BFQ4004

Dual-band Wi-Fi Module

AT Command Reference

July 2020

Overview

BFQ4004 AT Firmware, officially launched by BeeFi Technologies (hereafter “BeeFi”), is available for download and can be used directly. Users may also find AT Project where BeeFi created example demo code for users to customize their AT firmware.

This document provides detailed information about the BF4004Q WiFi module AT commands. It also introduces how to download firmware images onto the flash on the module as well as some customization examples.

Note

• Please make sure that correct binary file (.bin) has been installed in BFQ4004 module before using the AT commands in this document.
  
• AT firmware uses priority levels and 1 of system_os_task, so only one task of priority 2 is allowed to be set up by user application.
  

Command Types and Formats

Each command set contains four types of AT commands.

Type	Command Format	Description
Test Command	AT+<X>=?	Queries the Set Commands’ internal parameters and their range of values.
Query Command	AT+<X>?	Returns the current value of parameters.
Set Command	AT+<X>=<…>	Sets the value of user-defined parameters in commands, and runs these commands.
Execute Command	AT+<X>	Runs commands with no user-defined parameter.

Note

• Not all AT commands support all four varioations mentioned above.
  
• Square brackets “[]” designate the default value. It is not always required or may not appear.
  
• String values need to be included in double quotation markets, for example: AT+CWSAP_CUR=”BFQ4004A”,”123456789”,1,4
  
• The default baud rate is 1152.
  
• AT commands have to be capitalized and must end with a new line (CR LF).
  

Basic AT Commands

Overview

Commands	Description
AT	Tests AT startup.
ATE	Configures echoing of AT commands.
AT+RST	Restarts the module.
AT+GMR	Checks AT commands version information.
AT+RESTORE	Restores the factory settings.
AT+UART_CUR	The current UART configuration.
AT+UART_DEF	The default UART configuration, saved in flash.
AT+SYSRAM	Checks the available RAM space.
AT+SLEEP	Configures the operating modes for power optimization
AT+GSLP	Enters suspend (deep-sleep) mode.
AT+RFPOWER	Sets the maximum RF TX power.

Command Descriptions

AT – Tests AT Startup

Execute Command	AT
Response	OK
Parameters	-

AT+ATE – Configures Echoing of AT Commands

Execute Command	ATE
Response	OK
Parameters	ATE=: switches echo off. ATE=1: switches echo on.
Notes	This command is used to configure command echoing. It means that entered commands are echoed back to the sender when ATE is set to 1. Two settings are possible. The command returns OK in normal case and ERROR when a parameter other than or 1 was specified.

AT+RST – Restarts the Module

Execute Command	AT+RST
Response	OK
Parameters	-

AT+GMR – Checks AT Commands Version Information

Execute Command	AT+GMR
Response	<AT version info> <SDK version info> <compile time> OK
Parameters	-

AT+RESTORE – Restores Factory Settings

Execute Command	AT+RESTORE
Response	OK
Notes	The execution of this command resets all parameters saved in flash, and restores the factory default settings of the module. The chip will be restarted when this command is executed.

AT+UART_CUR – Current UART Configuration in RAM

Command	Query: AT+UART_CUR?	Set: AT+UART_CUR=<baudrate>, <databit s>,<stopbits>,<parity>, <flow control>
Response	+UART_CUR:<baudrate>, <databit s>,<stopbits>,<parity>, | <flow control> OK	OK
Notes	Command AT+UART_CUR? will return the actual value of UART configuration parameters, which may have allowable errors compared with the set value because of the clock division. For example, if the UART baud rate is set as 1152, the baud rate returned by using command AT+UART_CUR? could be 115273.	-
Parameters	<baudrate>: UART baud rate <databits>: data bits 5: 5-bit data 6: 6-bit data 7: 7-bit data 8: 8-bit data <stopbits>: stop bits 1: 1-bit stop bit 2: 1.5-bit stop bit 3: 2-bit stop bit <parity>: parity bit : None 1: Odd 2: Even <flow control>: flow control : flow control is not enabled 1: enable RTS 2: enable CTS 3: enable both RTS and CTS
Notes	The configuration changes will NOT be saved in the flash. The use of flow control requires the support of hardware: GPIO9 is UART CTS GPIO8 is UART RTS There are 2 UART ports, only UART has flow control (4-wire) The range of baud rates supported: 110~115200*4.
Examples	AT+UART_CUR=1152,8,1,,3

AT+UART_DEF – Default UART Configuration from Flash

Command	Query: AT+UART_DEF?	Set: AT+UART_DEF=<baudrate>, <databit s>,<stopbits>,<parity>, <flow control>
Response	+UART_DEF:<baudrate>, <databit s>,<stopbits>,<parity>, | <flow control> OK	OK
Parameters	<baudrate>: UART baud rate <databits>: data bits 5: 5-bit data 6: 6-bit data 7: 7-bit data 8: 8-bit data <stopbits>: stop bits 1: 1-bit stop bit 2: 1.5-bit stop bit 3: 2-bit stop bit <parity>: parity bit : None 1: Odd 2: Even <flow control>: flow control : flow control is not enabled 1: enable RTS 2: enable CTS 3: enable both RTS and CTS
Notes	The configuration changes will be saved in the user parameter area in the flash and will still be valid when the chip is powered on again after shutdown. The use of flow control requires the support of hardware: GPIO9 is UART CTS GPIO8 is UART RTS There are 2 UART ports, only UART has flow control (4-wire) The range of baud rates supported: 110~115200*4.
Examples	AT+UART_DEF=1152,8,1, ,3

AT+SYSRAM – Checks the Remaining Space on RAM

Query Command	AT+SYSRAM?
Response	+SYSRAM:<remaining RAM size> OK
Notes	<remaining RAM size>: remaining space of RAM, in bytes.

AT+SLEEP – Configures the Operating Modes for Power Optimization

Command	Query: AT+SLEEP?	Set: AT+SLEEP=<sleep mode>
Response	+SLEEP:<sleep mode> OK	OK
Parameters	<sleep mode>: : Disable sleep mode (high-performance mode) 1: Sleep mode 2: Associated mode
Notes	This command can only be used in Station mode. Associated mode is the default mode. “Disable sleep” means chip host CPU and everything else are all powered on. This is the highest power-consumption mode and also the highest performance mode. “Sleep” means WLAN blocks are powered down and clocks are suspended, and BFQ4004 is disconnected from access point. “Associated” means BFQ4004 is duty cycling between sleep state and active WLAN TX, RX. It is used to allow BFQ4004 to periodically wake up and listen for beacon signals from access point (AP) to maintain the connection with the AP.
Examples	AT+SLEEP=0

AT+GSLP – Enters Suspend (Deep-sleep) Mode

Set Command	AT+GSLP=<time>
Response	<time> OK
Parameters	<time>: the milliseconds (ms) BFQ4004 stays in suspend mode.
Notes	In suspend mode only the wakeup manager and PMU are powered with everything else powered down. It is the lowest power consumption mode at the expense of a longer wakeup latency. BFQ4004 can exit suspend mode in 2 ways: The synchronous internal timer expired after <time> milliseconds; or An asynchronous event is detected on the WAKEUP pin.

AT+RFPOWER – Sets Maximum of RF TX Power

Set Command	AT+RFPOWER=<TX power>
Response	OK
Parameters	<TX power>: the maximum value of RF TX power, range: [0, 82] in 0.25dBm unit
Notes	This command sets the maximum value of BFQ4004 RF TX power. It is not precise. The actual value could be smaller than the set value.
Examples	AT+RFPOWER=50

Hardware-Related AT Commands

Overview

Commands	Description
AT+SYSIOSETCFG	Configures IO working mode.
AT+SYSIOGETCFG	Checks the working mode of IO pin.
AT+SYSGPIODIR	Configures the direction of GPIO.
AT+SYSGPIOWRITE	Configures the GPIO output level.
AT+SYSGPIOREAD	Configures the GPIO input level.
AT+WAKEUPGPIO	Configures a GPIO to wake BFQ4004 up from sleep mode.

Command Descriptions

AT+SYSIOSETCFG – Configures IO Working Mode

Set Command	AT+SYSIOSETCFG=<pin>,<mode>,<pull-up>
Response	OK
Parameters	<pin>: number of an IO pin <mode>: the working mode of the IO pin <pull-up> : disable the pull-up 1: enable the pull-up of the IO pin
Notes	Please refer to BFQ4004 Pin List for uses of AT+SYSGPIO-related commands.
Examples	AT+SYSIOSETCFG=12,3,1 //Set GPIO12 to work as a GPIO

AT+SYSIOGETCFG – Get IO Working Mode

Set Command	AT+SYSIOGETCFG=<pin>
Response	+SYSIOGETCFG:<pin>,<mode>,<pull-up> OK
Parameters	<pin>: number of an IO pin <mode>: the working mode of the IO pin <pull-up> : disable the pull-up 1: enable the pull-up of the IO pin
Notes	Please refer to BFQ4004 Pin List for uses of AT+SYSGPIO-related commands.

AT+SYSGPIODIR – Configures the Direction of GPIO

Set Command	AT+SYSGPIODIR=<pin>,<dir>
Response	If the configuration is successful, the command will return: OK If the IO pin is not in GPIO mode, the command will return: NOT GPIO MODE! ERROR
Parameters	<pin>: GPIO pin number <dir>: : sets the GPIO as an input 1: sets the GPIO as an output
Notes	Please refer to BFQ4004 Pin List for uses of AT+SYSGPIO-related commands.
Examples	AT+SYSIOSETCFG=12,3,1 //Set GPIO12 to work as a GPIO AT+SYSGPIODIR=12,0 //Set GPIO12 to work as an input

AT+SYSGPIOWRITE – Configures the Output Level of a GPIO

Set Command	AT+SYSGPIOWRITE=<pin>,<level>
Response	If the configuration is successful, the command will return: OK If the IO pin is not in output mode, the command will return: NOT OUTPUT! ERROR
Parameters	<pin>: GPIO pin number <level>: : low level 1: high level
Notes	Please refer to BFQ4004 Pin List for uses of AT+SYSGPIO-related commands.
Examples	AT+SYSIOSETCFG=12,3,1 //Set GPIO12 to work as a GPIO AT+SYSGPIODIR=12,1 //Set GPIO12 to work as an output AT+SYSGPIOWRITE=12,1 //Set GPIO12 to output high level

AT+SYSGPIOREAD – Reads the GPIO Level

Set Command	AT+SYSGPIOREAD=<pin>
Response	If the configuration is successful, the command will return: +SYSGPIOREAD:<pin>,<dir>,<level> OK If the IO pin is not in GPIO mode, the command will return: NOT GPIO MODE! ERROR
Parameters	<pin>: GPIO pin number <dir>: : the GPIO as an input 1: the GPIO as an output <level>: : low level 1: high level
Notes	Please refer to BFQ4004 Pin List for uses of AT+SYSGPIO-related commands.
Examples	AT+SYSIOSETCFG=12,3,1 //Set GPIO12 to work as a GPIO AT+SYSGPIODIR=12,0 //Set GPIO12 to work as an input AT+SYSGPIOREAD=12 //Read GPIO12 level

AT+WAKEUPGPIO – Configures a GPIO to Wake BFQ4004 up from Sleep Mode

Set Command	AT+WAK EUPGPIO=<enable>,<trigger_GPIO>,<trigger_level>[, <awake_GPIO>,<awake_level>]
Response	OK
Parameters	<enable>: : BFQ4004 can NOT be woken up from sleep by GPIO. 1: BFQ4004 can be woken up from sleep by GPIO. <trigger_GPIO>: sets the GPIO to wake BFQ4004 up; range of value:[0, 15]. <trigger_level>: : the GPIO wakes up BFQ4004 with low level. 1: the GPIO wakes up BFQ4004 with high level. [<awake_GPIO>]: optional parameter to set a GPIO as a flag to indicate that BFQ4004 was awoken from sleep; range of value: [0, 15]. [<awake_level>]: optional parameter; : the awake_GPIO is set to low level after the wakeup process. 1: the awake_GPIO is set to high level after the wakeup process.
Notes	Since the system needs some time to wake up from sleep, it is suggested that wait at least 5ms before sending next AT command. The values of <trigger_GPIO> and <awake_GPIO> should not be the same. After being woken up by <trigger_GPIO> from sleep, when BFQ4004 attempts to sleep again, it will check the status of the <trigger_GPIO>. if <trigger_GPIO> is still in the wakeup status, BFQ4004 will enter Associated mode instead. If <trigger_GPIO> is NOT in the wakeup status, BFQ4004 will enter sleep mode.
Examples	Set BFQ4004 to be woken from sleep, when GPIO0 is at low level: AT+WAKEUPGPIO=1,, Set BFQ4004 to be woken from sleep, when GPIO0 is at high level, and after wake-up, GPIO13 should be set to high level. AT+WAKEUPGPIO=1,,1,13,1 Disable BFQ4004 from being woken up from sleep by a GPIO. AT+WAKEUPGPIO=

Wi-Fi-Related AT Commands

Overview

Commands	Description
AT+CWMODE_CUR	Sets the Wi-Fi mode (Station/SoftAP/Station+SoftAP); configuration not saved in flash.
AT+CWMODE_DEF	Sets the default Wi-Fi mode (Station/SoftAP/Station+SoftAP); configuration saved in flash.
AT+CWJAP_CUR	Connects to an AP; configuration not saved in flash.
AT+CWJAP_DEF	Connects to an AP; configuration saved in flash.
AT+CWLAPOPT	Sets the configuration of command AT+CWLAP.
AT+CWLAP	Lists available APs.
AT+CWQAP	Disconnects from an AP.
AT+CWSAP_CUR	Sets the current configuration of BFQ4004 SoftAP; configuration not saved in flash.
AT+CWSAP_DEF	Sets the configuration of BFQ4004 SoftAP; configuration saved in flash.
AT+CWLIF	Gets the IP addresses of the Stations the BFQ4004 SoftAP is connected with.
AT+CWDHCP_CUR	Enables/Disables DHCP; configuration not saved in the flash.
AT+CWDHCP_DEF	Enable/Disable DHCP; configuration saved in flash.
AT+CWDHCPS_CUR	Sets the IP address range the SoftAP DHCP server can allocate; configuration not saved in flash.
AT+CWDHCPS_DEF	Sets the IP address range the SoftAP DHCP server can allocate; configuration saved in flash.
AT+CWAUTOCONN	Connects to an AP automatically on power-up or not.
AT+CIPSTA_CUR	Sets the IP address of BFQ4004 Station; configuration not saved in flash.
AT+CIPSTA_DEF	Sets the IP address of BFQ4004 Station; configuration saved in flash.
AT+CIPAP_CUR	Sets the IP address of BFQ4004 SoftAP; configuration not saved in flash.
AT+CIPAP_DEF	Sets the IP address of BFQ4004 SoftAP; configuration saved in flash.
AT+WPS	Enables the WPS function.
AT+CWHOSTNAME	Configures the name of BFQ4004 Station.
AT+CWCOUNTRY_CUR	Sets current WiFi country code, not saved in flash
AT+CWCOUNTRY_DEF	Sets default WiFi country code, saved in flash

Command Descriptions

AT+CWMODE_CUR – Sets Current WiFi Mode Configuration, Not Saved in Flash

Command	Test: A T+CWMODE_CUR=?	Query: AT+CWMODE_CUR? Function: check current WiFi mode	Set: AT+CWMODE_CUR= | <mode> Function: set current WiFi mode
Response	+CWMODE_CUR: <mode> OK	+CWMODE_CUR: <mode> OK	OK
Parameters	<mode>: 1: Station mode 2: SoftAP mode 3: Station+SoftAP mode
Notes	The configuration changes will NOT be saved in flash.
Examples	A T+CWMODE_CUR=1

AT+CWMODE_DEF- Sets Default WiFi Mode Configuration, Saved in Flash

Command	Test: A T+CWMODE_DEF=?	Query: AT+CWMODE_DEF? Function: check current WiFi mode	Set: AT+CWMODE_DEF= | <mode> Function: set current WiFi mode
Response	+CWMODE_DEF: <mode> OK	+CWMODE_DEF: <mode> OK	OK
Parameters	<mode>: 1: Station mode 2: SoftAP mode 3: Station+SoftAP mode
Notes	The configuration changes will be saved in flash.
Examples	A T+CWMODE_DEF=1

AT+CWJAP_CUR – Connects to AP, Configuration Not Saved in Flash

Command	Query: AT+CWJAP_CUR? Function: check parameters of the AP BFQ4004 Station is connected to.	Set: AT+ CWJAP_CUR=<ssid>,<pwd>, [<bssid>,<pci_en>] Function: specify parameters of the AP BFQ4004 wants to connect to.
Response	+CW JAP_CUR:<ssid>,<bssid>, <channel>,<rssi> OK	OK or +CWJAP_CUR:<error code> FAIL
Parameters	<ssid>: a string parameter showing the SSID of the AP BFQ4004 Station is connected to.	<ssid>: target AP SSID, max length: 32 bytes <pwd>: target AP password, max length: 64-byte ASCII [<bssid>]: optional, target AP’s MAC address, used when multiple APs have the same SSID [<pci_en>]: optional, disable the connection to WEP or OPEN AP, and can be used for PCI authentication. <error code>: for reference only 1: connection timeout 2: wrong password 3: cannot find the target AP 4: connection failed This command requires Station mode to work. Escape character syntax is needed if SSID or password contains special characters, such as , or “ or \
Notes	The configuration changes will NOT be saved in flash
Examples	AT+CWJA P_CUR=”abc”,”123456789” For example, if the target AP’s SSID is “ab,c” and the password is “123456789”“, the command is as follows: AT+CWJAP_CUR=”a b\,c”,”123456789”" If multiple APs have the same SSID as “abc”, the target AP can be found by BSSID: AT+C WJAP_CUR=”abc”,”1234567 89”,”ca:d7:19:d8:a6:44”

AT+CWJAP_DEF – Connects to AP, Configuration Saved in Flash

Command	Query: AT+CWJAP_DEF? Function: check parameters of the AP BFQ4004 Station is connected to.	Set: AT+ CWJAP_DEF=<ssid>,<pwd>, [<bssid>,<pci_en>] Function: specify parameters of the AP BFQ4004 wants to connect to.
Response	+CW JAP_DEF:<ssid>,<bssid>, <channel>,<rssi> OK	OK or +CWJAP_DEF:<error code> FAIL
Parameters	<ssid>: a string parameter showing the SSID of the AP BFQ4004 Station is connected to.	<ssid>: target AP SSID, max length: 32 bytes <pwd>: target AP password, max length: 64-byte ASCII [<bssid>]: optional, target AP’s MAC address, used when multiple APs have the same SSID [<pci_en>]: optional, disable the connection to WEP or OPEN AP, and can be used for PCI authentication. <error code>: for reference only 1: connection timeout 2: wrong password 3: cannot find the target AP 4: connection failed This command requires Station mode to work. Escape character syntax is needed if SSID or password contains special characters, such as , or “ or \
Notes	The configuration changes will be saved in the system parameters area in the flash
Examples	AT+CWJA P_DEF=”abc”,”123456789” For example, if the target AP’s SSID is “ab,c” and the password is “123456789”“, the command is as follows: AT+CWJAP_DEF=”a b\,c”,”123456789”" If multiple APs have the same SSID as “abc”, the target AP can be found by BSSID: AT+C WJAP_DEF=”abc”,”1234567 89”,”ca:d7:19:d8:a6:44”

AT+CWLAPOPT – Sets the Configuration for the Command AT+CWLAP

Set Command	AT+CWLAPOPT=<sort_enable>,<mask>
Response	OK or ERROR
Parameters	<sort_enable>: determines whether the result of the command AT+CWLAP will be listed in order according to RSSI: : the result is not ordered according to RSSI. 1: the result is ordered according to RSSI. <mask>: determines the parameters shown in the result of AT+CWLAP; means not showing the parameter corresponding to the bit, and 1 means showing it. bit : determines whether <ecn> will be shown in the result of AT+CWLAP. bit 1: determines whether <ssid> will be shown in the result of AT+CWLAP. bit 2: determines whether <rssi> will be shown in the result of AT+CWLAP. bit 3: determines whether <mac> will be shown in the result of AT+CWLAP. bit 4: determines whether <ch> will be shown in the result of AT+CWLAP. bit 5: determines whether <freq offset> will be shown in the result of AT+CWLAP. bit 6: determines whether <freq calibration> will be shown in the result of AT+CWLAP. bit 7: determines whether <pairwise_cipher> will be shown in the result of AT+CWLAP. bit 8: determines whether <group_cipher> will be shown in the result of AT+CWLAP. bit 9: determines whether <bgn> will be shown in the result of AT+CWLAP. bit 1: determines whether <wps> will be shown in the result of AT+CWLAP.
Examples	AT+CWLAPOPT=1,247 The first parameter is 1, meaning that the result of the command AT+CWLAP will be ordered according to RSSI; The second parameter is 247, namely x7FF, meaning that the corresponding bits of <mask> are all set to 1 and all parameters will be shown in the result of AT+CWLAP.

AT+CWLAP – Lists Available APs

Command	Set: AT+CWLAP[=<ssid>,<mac>, <channel>,<scan_type>, <scan_time_min>, <scan_time_max>] Function: to query the APs with specific SSID and MAC on a specific channel.	Execute: AT+CWLAP Function: to list all available APs.
Response	+CWL AP:<ecn>,<ssid>,<rssi>, <mac>,< channel>,<freq_offset>, <freq_c ali>,<pairwise_cipher>, <gr oup_cipher>,<bgn>,<wps> OK	+CWL AP:<ecn>,<ssid>,<rssi>, <mac>,< channel>,<freq_offset>, <freq_c ali>,<pairwise_cipher>, <gr oup_cipher>,<bgn>,<wps> OK
Parameters	[<scan_type>]: optional parameter : active scan 1: passive scan [<scan_time_min>] : optional parameter, unit: ms, range: [,15] For active scan mode, <scan_time_min> is the minimum scan time for each channel, default is . For passive scan mode, <scan_time_min> is meaningless and can be omitted. [<scan_time_max>] : optional parameter, unit: ms, range: [,15] For active scan mode, <scan_time_max> is the maximum scan time for each channel. If it is set to be , the default value of 12 ms will be used. For passive scan mode, <scan_time_max> is the scan time for each channel, the default is 36 ms. <ecn>: encryption method. : OPEN 1: WEP 2: WPA_PSK 3: WPA2_PSK 4: WPA_WPA2_PSK 5: WPA2_Enterprise (AT can NOT connect to WPA2_Enterprise AP for now.) <ssid>: string parameter indicating the SSID of the AP. <rssi>: received signal strength from the AP. <mac>: string parameter indicating the MAC address of the AP. <channel>: WiFi channel number. <freq_offset>: frequency offset of the AP; unit: KHz. The value of ppm is <freq_offset>/2.4. <freq_cali>: calibration for frequency offset. <pairwise_cipher>: ：CIPHER_NONE | 1：CIPHER_WEP40 | 2：CIPHER_WEP104 | 3：CIPHER_TKIP | 4：CIPHER_CCMP | 5：CIPHER_TKIP_CCMP | 6：CIPHER_UNKNOWN | <group_cipher>: the definitions of cipher types are the same as <pairwise_cipher> <bgn>: Bit is for 802.11b mode; bit1 is for 802.11g mode; bit2 is for 802.11n mode; if the value of the bit is 1, the corresponding 802.11 mode is enabled; if the bit value is 0, the mode is disabled. <wps>：:WPS is | disabled; 1:WPS is enabled
Examples	AT+CWLAP=”Wi-Fi “,”ca:d7:19:d8:a6:44”,6 or search for APs with a designated SSID: AT+CWLAP=”Wi-Fi” or enable passive scan: AT+CWLAP=,,,1,,

AT+CWQAP – Disconnects from the AP

Execute Command	AT+CWQAP
Response	OK
Parameters	-

AT+CWSAP_CUR – Configures the BFQ4004 SoftAP, Configuration Not Saved to Flash

Command	Query: AT+CWSAP_CUR? Function: to obtain the configuration parameters of the BFQ4004 SoftAP.	Set: AT+ CWSAP_CUR=<ssid>,<pwd>, <chl>,<ecn>[,<max conn>] [,<ssid hidden>] Function: to configure the BFQ4004 SoftAP.
Response	CWSAP_CUR:<ssid>,<pwd>, < chl>,<ecn>,[<max_conn>, <ssid_hidden>]	OK or ERROR
Parameters	<ssid>: string parameter, the SSID of the AP. <pwd>: string parameter, length of password: 8 ~ 64 bytes ASCII. <chl>: channel ID. <ecn>: encryption method : OPEN 1: WEP 2: WPA_PSK 3: WPA2_PSK 4: WPA_WPA2_PSK [<max_conn>] (optional): maximum number of Stations to which BFQ4004 SoftAP can be connected to, range of [1, 8]. [<ssid_hidden>] (optional): : SSID is broadcasted. (the default setting) 1: SSID is not broadcasted.
Notes	The configuration will NOT be saved to the flash. This command is available only when BFQ4004 is in softAP mode. See AT+CWDHCP_CUR.
Examples	AT+CWSAP_CUR=”BFQ 4004AP”,”123456789”,5,3

AT+CWSAP_DEF - Configures the BFQ4004 SoftAP, Configuration Saved to Flash

Command	Query: AT+CWSAP_DEF? Function: to obtain the configuration parameters of the BFQ4004 SoftAP.	Set: AT+ CWSAP_DEF=<ssid>,<pwd>, <chl>,<ecn>[,<max conn>] [,<ssid hidden>] Function: to configure the BFQ4004 SoftAP.
Response	CWSAP_DEF:<ssid>,<pwd>, < chl>,<ecn>,[<max_conn>, <ssid_hidden>]	OK or ERROR
Parameters	<ssid>: string parameter, the SSID of the AP. <pwd>: string parameter, length of password: 8 ~ 64 bytes ASCII. <chl>: channel ID. <ecn>: encryption method : OPEN 1: WEP 2: WPA_PSK 3: WPA2_PSK 4: WPA_WPA2_PSK [<max_conn>] (optional): maximum number of Stations to which BFQ4004 SoftAP can be connected to, range of [1, 8]. [<ssid_hidden>] (optional): : SSID is broadcasted. (the default setting) 1: SSID is not broadcasted.
Notes	The configuration will be saved to the flash. This command is available only when BFQ4004 is in softAP mode. See AT+CWDHCP_DEF.
Examples	AT+CWSAP_DEF=”BFQ 4004AP”,”123456789”,5,3

AT+CWLIF – Gets the IP Addresses of the Stations the BFQ4004 SoftAP Is Connected With

Execute Command	AT+CWLIF
Response	<ip_addr>,<mac> OK
Parameters	<ip_addr>: IP addresses of Stations to which BFQ4004 SoftAP is connected. <mac>: MAC address of Stations to which BFQ4004 SoftAP is connected.
Notes	This command cannot get a static IP. It only works when both DHCPs of the BFQ4004 SoftAP, and of the Station to which BFQ4004 SoftAP is connected, are enabled.

AT+CWDHCP_CUR - Enables/Disables DHCP, Configuration Not Saved to Flash

Command	Query: AT+CWDHCP_CUR? Function: to obtain the status of DHCP.	Set: AT +CWDHCP_CUR=<mode>,<en> Function: to configure.DHCP.
Response	+CWSAP_CUR: <station_dhcp_status>, <softap_dhcp_status>	OK
Parameters	- <station_dhcp_status>: : Station DHCP is disabled. 1: Station DHCP is enabled. <softap_dhcp_status>: : SoftAP DHCP is disabled. 1: SoftAP DHCP is enabled.	<mode>: : Sets BFQ4004 SoftAP 1: Sets BFQ4004 Station 2: Sets both SoftAP and Station <en>: : Disables DHCP 1: Enables DHCP
Notes	The configuration changes will not be saved in flash. The Set Command interacts with static-IP-related AT commands (AT+CIPSTA-related and AT+CIPA-related commands): If DHCP is enabled, static IP will be disabled; If static IP is enabled, DHCP will be disabled; Whether it is DHCP or static IP that is enabled depends on the last configuration.
Examples	AT+CWDHCP_CUR=,1

AT+CWDHCP_DEF - Enables/Disables DHCP, Configuration Saved to Flash

Command	Query: AT+CWDHCP_DEF? Function: to obtain the status of DHCP.	Set: AT +CWDHCP_DEF=<mode>,<en> Function: to configure.DHCP.
Response	+CWSAP_DEF: <station_dhcp_status>, <softap_dhcp_status>	OK
Parameters	- <station_dhcp_status>: : Station DHCP is disabled. 1: Station DHCP is enabled. <softap_dhcp_status>: : SoftAP DHCP is disabled. 1: SoftAP DHCP is enabled.	<mode>: : Sets BFQ4004 SoftAP 1: Sets BFQ4004 Station 2: Sets both SoftAP and Station <en>: : Disables DHCP 1: Enables DHCP
Notes	The configuration changes will not be saved in flash. The Set Command interacts with static-IP-related AT commands (AT+CIPSTA-related and AT+CIPA-related commands): If DHCP is enabled, static IP will be disabled; If static IP is enabled, DHCP will be disabled; Whether it is DHCP or static IP that is enabled depends on the last configuration.
Examples	AT+CWDHCP_DEF=,1

AT+CWDHCPS_CUR - Sets the IP address Range the SoftAP DHCP Server Can Allocate, Configuration Not Saved to Flash

Command	Query: AT+CWDHCPS_CUR? Function: to obtain the IP address range of the SoftAP DHCP.	Set: A T+CWDHCPS_CUR=<enable>, <lease_ti me>,<start_IP>,<end_IP> Function: to set the IP address range of the BFQ4004 SoftAP DHCP server.
Response	+CW DHCPS_CUR=<lease_time>, <start_IP>,<end_IP>	OK
Parameters	<enable>: : Disable the settings and use the default IP range. 1: Enable setting the IP range, and the parameters below have to be set. <lease_time>: lease time; unit: minute; range [1, 288]. <star_ IP>: start IP address of the IP range that can be obtained from BFQ4004 SoftAP DHCP server. <end_IP>: end IP address of the IP range that can be obtained from BFQ4004 SoftAP DHCP server.
Notes	The configuration will NOT be saved to the flash. This AT command is enabled when BFQ4004 is configured as SoftAP, with DHCP enabled. The IP address should be in the same network segment as the IP address of BFQ4004 SoftAP.
Examples	A T+CWDHCPS_CUR=1,3,”192. 168.4.1”,”192.168.4.15” or AT+CWDHCPS_CUR= //Disable the settings and use the default IP range.

AT+CWDHCPS_DEF - Sets the IP address Range the SoftAP DHCP Server Can Allocate, Configuration Saved to Flash

Command	Query: AT+CWDHCPS_DEF? Function: to obtain the IP address range of the SoftAP DHCP.	Set: A T+CWDHCPS_DEF=<enable>, <lease_ti me>,<start_IP>,<end_IP> Function: to set the IP address range of the BFQ4004 SoftAP DHCP server.
Response	+CW DHCPS_DEF=<lease_time>, <start_IP>,<end_IP>	OK
Parameters	<enable>: : Disable the settings and use the default IP range. 1: Enable setting the IP range, and the parameters below have to be set. <lease_time>: lease time; unit: minute; range [1, 288]. <star_ IP>: start IP address of the IP range that can be obtained from BFQ4004 SoftAP DHCP server. <end_IP>: end IP address of the IP range that can be obtained from BFQ4004 SoftAP DHCP server.
Notes	The configuration will NOT be saved to the flash. This AT command is enabled when BFQ4004 is configured as SoftAP, with DHCP enabled. The IP address should be in the same network segment as the IP address of BFQ4004 SoftAP.
Examples	A T+CWDHCPS_DEF=1,3,”192. 168.4.1”,”192.168.4.15” or AT+CWDHCPS_DEF= //Disable the settings and use the default IP range.

AT+CWAUTOCONN – Automatically Connects to the AP on Power-up or Not

Set Command	AT+CWAUTOCONN=<enable>
Response	OK
Parameters	<enable>: : does NOT auto-connect to AP on power-up. 1: connects to AP automatically on power-up (default).
Notes	The configuration changes will be saved in the system parameter area in the flash.
Examples	AT+CWAUTOCONN=

AT+CIPSTA_CUR – Sets the Current IP Address of the BFQ4004 Station, Configuration Not Saved in Flash

Command	Query: AT+CIPSTA_CUR? Function: to obtain the IP address of the BFQ4004 Station.	Set: AT+CIPS TA_CUR=<ip>,[<gateway>, <netmask>] Function: to set the current IP address of the BFQ4004 Station.
Response	+CIPSTA_CUR:<ip> +CIPSTA_CUR:<gateway> +CIPSTA_CUR:<netmask> OK	OK
Parameters	<ip>: string parameter, the IP address of the BFQ4004 Station. [<gateway>]: gateway. [<netmask>]: netmask.
Notes	️ Warning: Only when the BFQ4004 Station is connected to an AP can its IP address be queried. The configuration will NOT be saved to the flash. The Set Command interacts with DHCP-related AT commands (AT+CWDHCP-related commands): If static IP is enabled, DHCP will be disabled; If DHCP is enabled, static IP will be disabled; Whether it is DHCP or static IP that is enabled depends on the last configuration.
Examples	AT+CIPSTA_ CUR=”192.168.6.1”,”192. 168.6.1”,”255.255.255.”

AT+CIPSTA_DEF - Sets the Default IP Address of the BFQ4004 Station, Configuration Saved in Flash

Command	Query: AT+CIPSTA_DEF? Function: to obtain the IP address of the BFQ4004 Station.	Set: AT+CIPS TA_DEF=<ip>,[<gateway>, <netmask>] Function: to set the current IP address of the BFQ4004 Station.
Response	+CIPSTA_DEF:<ip> +CIPSTA_DEF:<gateway> +CIPSTA_DEF:<netmask> OK	OK
Parameters	<ip>: string parameter, the IP address of the BFQ4004 Station. [<gateway>]: gateway. [<netmask>]: netmask.
Notes	️ Warning: Only when the BFQ4004 Station is connected to an AP can its IP address be queried. The configuration will be saved to the flash. The Set Command interacts with DHCP-related AT commands (AT+CWDHCP-related commands): If static IP is enabled, DHCP will be disabled; If DHCP is enabled, static IP will be disabled; Whether it is DHCP or static IP that is enabled depends on the last configuration.
Examples	AT+CIPSTA_ DEF=”192.168.6.1”,”192. 168.6.1”,”255.255.255.”

AT+CIPAP_CUR – Sets the Current IP Address of the BFQ4004 SoftAP, Configuration Not Saved in Flash

Command	Query: AT+CIPAP_CUR? Function: to obtain the IP address of the BFQ4004 SoftAP.	Set: AT+CIP AP_CUR=<ip>,[<gateway>, <netmask>] Function: to set the current IP address of the BFQ4004 SoftAP.
Response	+CIPAP_CUR:<ip> +CIPAP_CUR:<gateway> +CIPAP_CUR:<netmask> OK	OK
Parameters	<ip>: string parameter, the IP address of the BFQ4004 SoftAP. [<gateway>]: gateway. [<netmask>]: netmask.
Notes	The configuration will NOT be saved to the flash. Currently, only supports class C IP addresses. The Set Command interacts with DHCP-related AT commands (AT+CWDHCP-related commands): If static IP is enabled, DHCP will be disabled; If DHCP is enabled, static IP will be disabled; Whether it is DHCP or static IP that is enabled depends on the last configuration.
Examples	AT+CIPAP_ CUR=”192.168.5.1”,”192. 168.5.1”,”255.255.255.”

AT+CIPAP_DEF - Sets the Default IP Address of the BFQ4004 SoftAP, Configuration Saved in Flash

Command	Query: AT+CIPAP_DEF? Function: to obtain the IP address of the BFQ4004 SoftAP.	Set: AT+CIP AP_DEF=<ip>,[<gateway>, <netmask>] Function: to set the current IP address of the BFQ4004 SoftAP.
Response	+CIPAP_DEF:<ip> +CIPAP_DEF:<gateway> +CIPAP_DEF:<netmask> OK	OK
Parameters	<ip>: string parameter, the IP address of the BFQ4004 SoftAP. [<gateway>]: gateway. [<netmask>]: netmask.
Notes	The configuration will be saved to the flash. Currently, only supports class C IP addresses. The Set Command interacts with DHCP-related AT commands (AT+CWDHCP-related commands): If static IP is enabled, DHCP will be disabled; If DHCP is enabled, static IP will be disabled; Whether it is DHCP or static IP that is enabled depends on the last configuration.
Examples	AT+CIPAP_ DEF=”192.168.5.1”,”192. 168.5.1”,”255.255.255.”

AT+WPS – Enables the WPS Function

Set Command	AT+WPS=<enable>
Response	OK
Parameters	<enable>: : disables WPS. 1: enables WPS (Wi-Fi Protected Setup)
Notes	WPS must be used when the BFQ4004 Station is enabled. WPS does not support WEP (Wired-Equivalent Privacy) encryption.
Examples	AT+CWMODE=1 AT+WPS=1

AT+CWHOSTNAME – Configures the Name of BFQ4004 Station

Command	Query: AT+CWHOSTNAME? Function: to check the name of the BFQ4004 Station.	Set: AT+ CWHOSTNAME =<hostname> Function: to set the name of the BFQ4004 Station.
Response	+CWHOSTNAME:<hostname> OK If the Station mode is not enabled, the command will return: +CWHOSTNAME:<null> OK	OK If the Station mode is not enabled, the command will return: ERROR
Parameters	<hostname>: the host name of the BFQ4004 Station, the maximum length is 32 bytes.
Notes	The configuration changes are NOT saved in the flash. The default host name of the BFQ4004 Station is BFQ4004_XXXXXX; XXXXXX is the lower 3 bytes of the MAC address, for example, +CWHOS TNAME:<BFQ4004_A378DA>.
Examples	AT+CWMODE=1 AT+CWHOSTNAME=”my_test”

AT+CWCOUNTRY_CUR – Sets the Current Wi-Fi Country Code, Configuration Not Saved in Flash

Command	Query: AT+CWCOUNTRY_CUR? Function: to check the current WiFi country code of BQ4004	Set: AT+ CWCPUNTRY_CUR= <country_ policy>,<country_code>, <start_channel>, <total_channel_count> Function: to set the current WiFi country code of BFA4004.
Response	+CWCOUNTRY_CUR: <country_policy>, <country_code>, <start_channel>, <total_channel_count> OK AT+CWCOUNTRY_CUR? returns the actual value of WiFi country code, which may be changed to the same as the AP it connected to.	OK
Parameters	<country_policy>: : will change the county code to be the same as the AP that BFQ4004 is connected to 1: the country code will not change, always be the one set by command. <country_code>: country code, the length can be 3 characters at most; but the third character is a special character which will not be shown when querying by command AT+CWCOUNTRY_CUR? <start_channel> : the channel number to start at. <total_channel_count> : channel count.
Notes	The configuration changes are NOT saved in the flash.
Examples	AT+CWMODE=1 AT+CW COUNTRY_CUR=1,”US”,1,13

AT+CWCOUNTRY_DEF – Sets the Default Wi-Fi Country Code, Configuration Save in Flash

Command	Query: AT+CWCOUNTRY_DEF? Function: to check the default WiFi country code of BQ4004	Set: AT+ CWCPUNTRY_DEF= <country_ policy>,<country_code>, <start_channel>, <total_channel_count> Function: to set the default WiFi country code of BFA4004.
Response	+CWCOUNTRY_DEF: <country_policy>, <country_code>, <start_channel>, <total_channel_count> OK AT+CWCOUNTRY_DEF? returns the default value of WiFi country code stored in the flash.	OK
Parameters	<country_policy>: : will change the county code to be the same as the AP that BFQ4004 is connected to 1: the country code will not change, always be the one set by command. <country_code>: country code, the length can be 3 characters at most; but the third character is a special character which will not be shown when querying by command AT+CWCOUNTRY_DEF? <start_channel> : the channel number to start at. <total_channel_count> : channel count.
Notes	The configuration changes are saved in the user parameter area of the flash.
Examples	AT+CWMODE=1 AT+CW COUNTRY_DEF=1,”US”,1,13

TCP/IP-Related AT Commands

Overview

Commands	Description
AT+CIPSTATUS	Gets the connection status
AT+CIPDOMAIN	DNS function
AT+CIPSTART	Establishes TCP connection, UDP transmission or SSL connection
AT+CIPSSLSIZE	Sets the size of SSL buffer
AT+CIPSSLCCONF	Configures the SSL client
AT+CIPSEND	Sends Data
AT+CIPSENDEX	Sends data when length of data is <length>, or when \ appears in the data
AT+CIPSENDBUF	Writes data into TCP-send-buffer
AT+CIPBUFRESET	Resets the segment ID count
AT+CIPBUFSTATUS	Checks the status of TCP-send-buffer
AT+CIPCHECKSEQ	Checks if a specific segment is sent or not
AT+CIPCLOSE	Closes TCP/UDP/SSL connection
AT+CIFSR	Gets the local IP address
AT+CIPMUX	Configures the multiple connections mode
AT+CIPSERVER	Creates or deletes TCP server
AT+CIPSERVERMAXCONN	Set the maximum connections that server allows
AT+CIPMODE	Configures the transmission mode
AT+CIPSTO	Sets timeout when BFQ4004 runs as TCP server
AT+PING	Ping packets
AT+CIUPDATE	Upgrades the software through network
AT+CIPDINFO	Shows remote IP and remote port with +IPD
+IPD	BFQ4004 receives network data
AT+CIPRECVMODE	Set TCP Receive Mode
AT+CIPRECVDATA	Get TCP Data in Passive Receive Mode
AT+CIPRECVLEN	Get TCP Data Length in Passive Receive Mode
AT+CIPSNTPCFG	Configures the time domain and SNTP server.
AT+CIPSNTPTIME	Queries the SNTP time.
AT+CIPDNS_CUR	Sets user-defined DNS servers; configuration not saved in flash
AT+CIPDNS_DEF	Sets user-defined DNS servers; configuration saved in flash

Command Descriptions

AT+CIPSTATUS – Gets the Connection Status

Execute Command	AT+CIPSTATUS
Response	STATUS:<status> +CIPSTATUS:<li nk_ID>,<conn_type>,<remote_IP>,<remote_port>, | <local_port>,<tetype>
Parameters	<status>: status of the BFQ4004 Station interface. 2: The BFQ4004 Station is connected to an AP and a remote IP is obtained (connected to remote IP). 3: The BFQ4004 Station has established a TCP connection or is transmitting in UDP (communication established). 4: The TCP or UDP is disconnected and remote IP is lost, but BFQ4004 is still connected to an AP (not connected to remote IP but is still connected to an AP). 5: The BFQ4004 Station is not connect to an AP (lost AP). <link_ID>: ID of the connection (0~4), used for multiple connections. <conn_type>: string parameter, “TCP” or “UDP”. <remote _IP>: string parameter indicating the remote IP address. <remote_port>: the remote port number. <local_port>: BFQ4004 local port number. <tetype>: : BFQ4004 runs as a client. 1: BFQ4004 runs as a server.

AT+CIPDOMAIN – DNS Function

Execute Command	AT+CIPDOMAIN=<domain_name>
Response	+CIPDOMAIN:<IP_address> OK or DNS Fail ERROR
Parameters	<domain_name>: the domain name. Max length is 64 bytes. <IP_address>: the IP address corresponding to the domain name.
Examples	AT+CWMODE=1 // set Station mode AT+CWJAP=”SSID”,”password” // access to the internet AT+CIPDOMAIN=”www.beefi.io” // DNS function

AT+CIPSTART – Establishes TCP Connection, UDP Transmission or SSL Connection

Establish TCP Connection

Set Command	Single connection (AT+CIPMUX=): AT +CIPSTART=<conn_type>, | <r emote_IP/domain_name>, | <remote_port> | [,<TCP_keep_alive>]	Multiple Connections (AT+CIPMUX=1): AT+CIPSTART=<link_ID>, | <conn_type>, | <r emote_IP/domain_name>, | <remote_po rt>[,<TCP_keep_alive>]
Response	OK or ERROR If the TCP connection is already established, the response is: ALREADY CONNECTED
Parameters	<link_ID>: ID of network connection (0~4), used for multiple connections. <conn_type>: string parameter indicating the connection type: “TCP”, “UDP” or “SSL”. <r emote_IP/domain_name>: string parameter indicating the remote IP address or domain name to connect to. <remote_port>: the remote port number. [<TCP_keep_alive>]: optional; detection time interval when TCP is kept alive. : disable TCP keep-alive (default) 1 ~ 72: detection time interval; unit: second (s).
Notes	The configuration changes are saved in the user parameter area of the flash.
Examples	AT+CIPSTART= “TCP”,”www.beefi.io”,8 AT+CIPSTART=” TCP”,”192.168.11.11”,1 For more information please see: BFQ4004 AT Command Examples.

Establish UDP Transmission

Set Command	Single connection (AT+CIPMUX=): AT +CIPSTART=<conn_type>, | <r emote_IP/domain_name>, | <remote_port> | [,<l ocal_port>,<UDP_mode>]	Multiple Connections (AT+CIPMUX=1): AT+CIPSTART=<link_ID>, | <conn_type>, | <r emote_IP/domain_name>, | <remote_port> | [,<l ocal_port>,<UDP_mode>]
Response	OK or ERROR If the UDP transmission is already established, the response is: ALREADY CONNECTED
Parameters	<link_ID>: ID of network connection (0~4), used for multiple connections. <conn_type>: string parameter indicating the connection type: “TCP”, “UDP” or “SSL”. <r emote_IP/domain_name>: string parameter indicating the remote IP address or domain name to connect to. <remote_port>: the remote port number. [<local_port>]: optional; UDP port of BFQ4004. [<UDP_mode>]: optional; In the UDP transparent transmission, the value of this parameter has to be . : the destination peer entity of UDP will not change (default). 1: the destination peer entity of UDP can change once. 2: the destination peer entity of UDP is allowed to change. ️ Warning: To use <UDP_mode>, <local_port> must be set first.
Examples	AT+CIPSTART=”UDP”, “192.168.11.11”,1,12,2 For more information please see: BFQ4004 AT Command Examples.

Establish SSL Connection

Set Command	AT+CIPSTART= [<link_ID>,]<conn_type>,<remote_IP>,<remote_port> [,<TCP keep alive>]
Response	OK or ERROR If the TCP connection is already established, the response is: ALREADY CONNECTED
Parameters	<link_ID>: ID of network connection (0~4), used for multiple connections. <conn_type>: string parameter indicating the connection type: “TCP”, “UDP” or “SSL”. <remote_IP/domain_name>: string parameter indicating the remote IP address or domain name to connect to. <remote_port>: the remote port number. [<TCP_keep_alive>]: optional; detection time interval when TCP is kept alive. : disable TCP keep-alive (default) 1 ~ 72: detection time interval; unit: second (s).
Notes	BFQ4004 can only set one SSL connection at most. SSL connection does not support UART-Wi-Fi passthrough mode (transparent transmission). (HOW ABOUT MUTUAL SSL? ADD HERE?) ️ Warning: SSL connection needs a large amount of memory. Please use the command AT+CIPSSLSIZE=<size> as neede to enlarge the SSL buffer size. Insufficient buffer size may cause system to reboot. #
Examples	AT+CIPSTART=”SSL”,”www.beefi.io”,8443

AT+CIPSSLSIZE – Sets the Size of the SSL Buffer

Set Command	AT+CIPSSLSIZE=<size>
Response	OK
Parameters	<size>: the size of the SSL buffer; range of value: [248, 496].
Examples	AT+CIPSSLSIZE=496

AT+CIPSSLCCONF – Configures the SSL Client

Command	Query: AT+CIPSSLCCONF? Function: gets the configuration of the BFQ4004 SSL client.	Set: AT+CIPSSLCCONF=<SSL mode> Function: sets the configuration of the BFQ4004 SSL client.
Response	+CIPSSLCCONF:<SSL mode> OK	OK
Parameters	<SSL mode>: a value from -3 representing 2 bits used to configure the SSL as described below: Bit：if set to 1, | certificate and private key will be enabled, so SSL server can verify BFQ4004; if 0, then certificate and private key will not be enable. bit1：if set to 1, | CA will be enabled, so BFQ4004 can verify SSL server; if 0, CA will not be enabled. (Looks like ESP8266 can also do mutual SSL according to the above 2-bit settings? What should be added to cover mutual SSL feature BFQ4004 provides?)
Notes	If certificates need to be enabled, please call this command before SSL connection is established. If certificates need to be enabled, please refer to the BFQ4004 SSL User Guide to generate certificates. esp_ca_cert.bin downloads to 0xFB000 by default e sp_cert_private_key.bin downloads to 0xFC000 by default Users can revise the SYSTEM_PARTI TION_SSL_CLIENT_CA_ADDR and SYSTEM_PARTITION_SSL_C LIENT_CERT_PRIVKEY_ADDR in user_main.c to change the downloading addresses. This configuration will be saved in the user parameter area of the flash.
Examples	AT+CWMODE=1 // enable sta mode AT+ CWJAP=”SSID”,”PASSWORD” // connect to an AP AT+CIPSNTPCFG=1,8 // set SNTP time zone AT+CIPSNTPTIME? // get SNTP time AT+CIPSSLCCONF=2 AT+CIPSTART=”S SL”,”192.168.3.38”,8443

AT+CIPSEND – Sends Data

Command	Set Command: Single connection: (+CIPMUX=) AT+CIPSEND=<length> Multiple connections: (+CIPMUX=1) AT+CIP SEND=<link_ID>,<length> Remote IP and ports can be optionally set in UDP transmission: AT+CIPSEND=[<link_ID>,] | <length> [,<remote_IP>, <remote_port>] Function: to configure the data length in normal transmission mode.	Execute Command: AT+CIPSEND Function: to start sending data in transparent transmission mode.
Response	Send data of designated length. Wrap return > after the Set Command. Begin receiving serial data. When data length defined by <length> is met, the transmission of data starts. If the connection cannot be established or gets disrupted during data transmission, the system returns: ERROR If data is transmitted successfully, the system returns: SEND OK If it failed, the system returns: SEND FAIL	Wrap return > after executing this command. Enter transparent transmission, with a 20-ms interval between each packet, and a maximum of 248 bytes per packet. When a single packet containing +++ is received, BFQ4004 returns to normal command mode. Please wait for at least one second before sending the next AT command. This command can only be used in transparent transmission mode which requires single connection. For UDP transparent transmission, the value of<UDP_mode> has to be when using AT+CIPSTART.
Parameters	<link_ID>: ID of the connection (~4), for multiple connections. <length>: data length, MAX: 248 bytes. [<remote_IP>]: optional; remote IP address that can be set for UDP transmission. [<remote_port>]: optional; remote port that can be set for UDP transmission.	-
Examples	AT+CIPSEND=124 // +CIPMUX= AT+CIPSEND=2,124 // +CIPMUX=1

AT+CIPSENDEX – Sends Data

Set Command	Single connection: (+CIPMUX=) AT+CIPSENDEX=<length> Multiple connections: (+CIPMUX=1) AT+CIPSENDEX=<link_ID>,<length> Remote IP and ports can be set in UDP transmission: AT+CIPSENDEX =[<link_ID>,]<length>[,<remote_IP>,<remote_port>] Function: to configure the data length in normal transmission mode.
Response	Send data of designated length. Wrap return > after the Set Command. Begin receiving serial data. When the requirement of data length, determined by <length>, is met, or when \ appears in the data, the transmission starts. If connection cannot be established or gets disconnected during transmission, the system returns: ERROR If data are successfully transmitted, the system returns: SEND OK If it failed, the system returns: SEND FAIL
Parameters	<link_ID>: ID of the connection (~4), for multiple connections. <length>: data length, MAX: 248 bytes. When the requirement of data length, determined by <length>, is met, or when \ appears, the transmission of data starts. Go back to the normal command mode and wait for the next AT command. When sending \, please send it as .

AT+CIPSENDBUF – Writes Data Into the TCP-Send-Buffer

Set Command	Single connection: (+CIPMUX=) AT+CIPSENDBUF=<length> Multiple connections: (+CIPMUX=1) AT+CIPSENDBUF=<link_ID>,<length>
Response	<current segment_ID>,<segment_ID of which sent successfully> OK > Wrap return > begins receiving serial data; when the length of data defined by the parameter <length> is met, the data is sent; if the data length over the value of <length>, the data will be discarded, and the command returns busy. If the connection cannot be established, or if it is not a TCP connection, or if the buffer is full, or some other error occurs, the command returns ERROR If data is transmitted successfully, for single connection, the response is: <segment_ID>,SEND OK for multiple connections, the response is: <link_ID>,<segment_ID>,SEND OK If it failed, the system returns: SEND FAIL
Parameters	<link_ID>: ID of the connection (~4), for multiple connections. <segment_ID>: uint32; the ID assigned to each data packet, starting from 1; the ID number increases by 1 every time a data packet is written into the buffer. <length>: data length, MAX: 248 bytes.
Notes	This command only writes data into the TCP-send-buffer, so it can be called continually, and the user need not wait for SEND OK; if a TCP segment is sent successfully, it will return <segment ID>,SEND OK. Before data length reaches the value defined by <length>, input +++ can switch back from data mode to command mode, and discard the data received before. This command can NOT be used for SSL connections.

AT+BUFRESET – Resets the Segment ID Count

Set Command	Single connection: (+CIPMUX=) AT+CIPBUFRESET Multiple connections: (+CIPMUX=1) AT+CIPBUFRESET=<link_ID>
Response	OK If the connection is not established or there is still TCP data waiting to be sent, the response will be: ERROR
Parameters	<link_ID>: ID of the connection (~4), for multiple connections.
Notes	This command can only be used when AT+CIPSENDBUF is used.

AT+CIPBUFSTATUS – Checks the Status of the TCP-Send-Buffer

Set Command	Single connection: (+CIPMUX=) AT+CIPBUFSTATUS Multiple connections: (+CIPMUX=1) AT+CIPBUFSTATUS=<link_ID>
Response	<next segment_ID>,<segment_ID sent >,<segment_ID successfully sent>,<remain_buffer_size>,<queue_number> OK
Parameters	<next segment_ID>: the next segment ID obtained by AT+CIPSENDBUF; <segment_ID sent>: the ID of the TCP segment last sent; Only when <next segment_ID> - <segment_ID sent> = 1, can AT+CIPBUFRESET be called to reset the count. <segment_ID successfully sent>: the ID of the last successfully sent TCP segment; <remain_buffer_size>: the remaining size of the TCP-send-buffer in bytes; <queue_number>: available TCP queue number; it’s not reliable and should be used as a reference only.
Notes	This command can NOT be used for SSL connection.
Examples	For example, in single connection, the command AT+CIPBUFSTATUS returns: 2,15,1,2,7 Description: 2: means that the latest segment ID is 19; so when calling AT+CIPSENDBUF the next time, the segment ID returned is 20; 15: means that the TCP segment with the ID 15 is the last segment sent, but the segment may not be successfully sent; 1: means that the TCP segment with the ID 1 was sent successfully; 2: means that the remaining size of the TCP-send-buffer is 2 bytes; 7: the available TCP queue number; it is not reliable and should be used as a reference only; when the queue number is , no TCP data can be sent.

AT+CIPCHECKSEQ – Checks If a Specific Segment Was Successfully Sent

Set Command	Single connection: (+CIPMUX=) AT+CIPCHECKSEQ=<segment_ID> Multiple connections: (+CIPMUX=1) AT+CIPCHECKSEQ=<link_ID>,<segment_ID>
Response	[<link ID>,]<segment_ID>,<status> OK
Parameters	The command can only be used to check the status of the last 32 segments sent. [<link_ID>]: ID of the connection (~4), for multiple connection; <segment_ID>: the segment ID obtained by calling AT+CIPSENDBUF; <status>: FALSE: the segment sending failed; TRUE: the segment was sent successfully.
Notes	This command can only be used when AT+CIPSENDBUF is used.

AT+CIPCLOSE – Closes the TCP/UDP/SSL Connection

Command	Set Command: (used in multiple connections) AT+CIPCLOSE=<link_ID> Function: to close the particular link_ID TCP/UDP connection.	Execute Command: (used in multiple connections) AT+CIPCLOSE Function: to close all TCP/UDP connections.
Response	OK
Parameters	<link_ID>: ID of the connection to be closed. When ID is 5, all connections will be closed. In server mode, ID=5 has no effect.	-
Examples	AT+CIPSEND=124 // +CIPMUX= AT+CIPSEND=2,124 // +CIPMUX=1

AT+CIFSR – Gets the Local IP Address

Execute Command	AT+CIFSR
Response	+CIFSR:APIP,<SoftAP_IP> +CIFSR:APMAC,<SoftAP_MAC> +CIFSR:STAIP,<Station_IP> +CIFSR:STAMAC,<Station_MAC> OK
Parameters	<SoftAP_IP>: IP address of the BFQ4004 SoftAP. <Station_IP>: IP address of the BFQ4004 Station. <SoftAP_MAC>: MAC address of the BFQ4004 SoftAP. <Station_MAC>: MAC address of the BFQ4004 Station.
Notes	Only when the BFQ4004 Station is connected to an AP can its Station IP can be queried.

AT+CIPMUX – Enables or Disables Multiple Connections

Command	Query Command: AT+CIPMUX? Function: checks the connection mode.	Set Command: AT+CIPMUX=< mode> Function: sets the connection mode.
Response	+CIPMUX:< mode> OK	OK
Parameters	<mode>: ：single connection. | 1：multiple | connections.
Notes	The default mode is single connection. Multiple connections can only be set when transparent transmission is disabled (AT+CIPMODE=). This mode can only be changed after all connections are disconnected. If the TCP server is running, it must be deleted (AT+CIPSERVER=) before the single connection mode is activated.
Examples	AT+CIPMUX=1

AT+CIPSERVER – Creates or Deletes TCP Server

Set Command	AT+CIPSERVER=<mode>[,<port>]
Response	OK
Parameters	<mode>: : deletes server. 1: creates server. <port>: port number; 333 by default.
Notes	A TCP server can only be created when multiple connections are activated (AT+CIPMUX=1). A server monitor will automatically be created when the TCP server is created. When a client is connected to the server, it will take up one connection and be assigned an ID.
Examples	AT+CIPMUX=1 AT+CIPSERVER=1,11

AT+CIPSERVERMAXCONN – Sets the Maximum Connections Allowed by Server

Command	Query Command: AT+CIPSERVERMAXCONN? Function: obtains the maximum number of clients allowed to connect to the TCP or SSL server.	Set Command: AT+CIPSERVERMAXCONN=< num> Function: sets the maximum number of clients allowed to connect to the TCP or SSL server.
Response	+CIPSERVERMAXCONN:< num> OK	OK
Parameters	<num>: the maximum number of clients allowed to connect to the TCP or SSL server, range:[1~5].
Notes	AT +CIPSERVERMAXCONN=<num> should be used to set up the correct configuration before creating a server.
Examples	AT+CIPMUX=1 AT+CIPSERVERMAXCONN=2 AT+CIPSERVER=1,8

AT+CIPMODE – Sets Transmission Mode

Command	Query Command: AT+CIPMODE? Function: checks the transmission mode.	Set Command: AT+CIPMODE=< mode> Function: sets the transmission mode.
Response	+CIPMODE:< mode> OK	OK
Parameters	<mode>: : normal transmission mode. 1: UART-Wi-Fi passthrough mode (transparent transmission), which can only be enabled in TCP single connection mode or in UDP mode when the remote IP and port do not change.
Notes	The configuration changes will NOT be saved in flash. During the UART-Wi-Fi passthrough transmission, if the TCP connection breaks, BFQ4004 will keep trying to reconnect until +++ is inputted to exit the transmission. If it is a normal TCP transmission and the TCP connection breaks, BFQ4004 will give a prompt and will not attempt to reconnect.
Examples	AT+CIPMODE=1

AT+CIPSTO – Sets the TCP Server Timeout

Command	Query Command: AT+CIPSTO? Function: checks the TCP server timeout setting.	Set Command: AT+CIPSTO=< time> Function: sets the TCP server timeout.
Response	+CIPSTO:< time> OK	OK
Parameters	<time>: TCP server timeout duration, range: ~72 seconds (s).
Notes	BFQ4004 configured as a TCP server will disconnect from the TCP client that has not communicated with it for a duration equal to the <time> set. If AT+CIPSTO=, the connection will never time out. This configuration is not recommended.
Examples	AT+CIPMUX=1 AT+CIPSERVER=1,11 AT+CIPSTO=1

AT+PING – Pings Packets

Set Command	AT+PING=<IP> Function: ping packets.
Response	+<time> OK or +timeout ERROR
Parameters	<IP>: string representing host IP address or domain name. <time>: the response time of ping.
Examples	AT+PING=”192.168.1.1” AT+PING=”www.beefi.io”

AT+CIUPDATE – Updates the Software Through Wi-Fi

Execute Command	AT+CIUPDATE Function: updates software.
Response	+CIUPDATE:<action> OK
Parameters	<action>: 1: find the server. 2: connect to server. 3: get the software version. 4: start updating.
Notes	The speed of the upgrade depends on the connection quality of the network. ERROR will be returned if the upgrade fails due to unfavorable network conditions. Please wait for some time before retrying. If using BeeFi’s AT BIN (/BFQ4004/bin/at), AT+CIUPDATE will download a new AT BIN from the BeeFi Cloud. If using a user-compiled AT BIN, users need to make their own AT+CIUPDATE upgrade. BeeFi provides a demo as a reference for local upgrade (see: /BFQ4004/example/at). It is suggested that users call AT+RESTORE to restore the factory default AT settings after upgrading the AT firmware.

AT+CIPDINFO – Shows the Remote IP and Port with +IPD

Set Command	AT+CIPDINFO=<mode> Function: sets whether to show remote IP and port with +IPD.
Response	OK
Parameters	<mode>: : does not show the remote IP and port with +IPD. 1: shows the remote IP and port with +IPD.
Examples	AT+CIPDINFO=1

+IPD – Receives Network Data

Command	Single connection: (+CIPMUX=)+IPD,<len> [,<rem ote_IP>,<remote_port>]: <data>	Multiple connection: (+CIPMU X=)+IPD,<link_ID>,<len> [,<rem ote_IP>,<remote_port>]: <data>
Parameters	The command is valid in normal command mode. When the module receives network data, it will send the data through the serial port using the +IPD command. [<remote_IP>]: remote IP, enabled by command AT+CIPDINFO=1. [<remote_port>]: remote port, enabled by command AT+CIPDINFO=1. <link_ID>: ID number of connection. <len>: data length. <data>: data received.

AT+CIPRECVMODE – Sets TCP Receive Mode

Command	Query Command: AT+CIPRECVMODE? Function: checks the receive mode of TCP data.	Set Command: AT+CIPRECVMODE=<mode> Function: sets the receive mode of TCP data.
Response	+CIPRECVMODE:<mode> OK	OK
Parameters	<mode>: the receive mode of TCP data. : active mode (default) – BFQ4004 will send all the received TCP data instantly to host MCU through UART with header “+IPD”. 1: passive mode – BFQ4004 will keep the received TCP data in an internal buffer (default is 292 bytes), and wait for host MCU to read the data. If the buffer is full, the TCP transmission will be blocked.
Notes	The configuration is for normal TCP transmission only, and cannot be used on SSL, UDP or WiFi- UART passthrough modes. If the passive mode is enabled, when BFQ4004 receives TCP data, it will prompt the following message in different scenarios: For multiple connection mode (AT+CIPMUX=1), the message is: +IPD,<link_ID>,<len> For single connection mode (AT+CIPMUX=), the message is: +IPD,<len> <len> is the total length of TCP data in buffer
Examples	AT+CIPRECVMODE=1

AT+CIPRECVDATA – Gets TCP Data In Passive Receive Mode

Set Command	Single connection mode (AT+CIPMUX=): AT+CIPRECVDATA=<len>	Multiple connections mode (AT+CIPMUX=1): AT+CIPRE CVDATA=<link_ID>,<len>
Response	+CIPRECVDAT A:<actual_leng>,<data> OK
Parameters	<link_ID>: connection ID in multiple connection mode. <len>: data length requested, max is 248 bytes for each request. <actual_len>: length of the data actually received <data>: the data received
Notes	In case of disconnection, the buffered TCP data will still be there and can be read by MCU until a new connection is established. If the newly established connection happens to use the same link ID, the previously buffered data in the last connection will be lost.
Examples	AT+CIPRECVMODE=1 // For example, if host MCU got a message of receiving 1 bytes data in connection with connection , the message will be as following: +IPD,,1 // then you can read those 100 bytes by using the command below AT+CIPRECVDATA=,1

AT+CIPREVLEN – Gets TCP Data Length in Passive Received Mode

Query Command	AT+CIPRECVLEN?
Response	+CIPRECVLEN:<data length of link0>,<data length of link1>,<data length of link2>,<data length of link3>,<data length of link4> OK
Parameters	<data length of link#>: length of the data currently buffered for the particular link number.
Examples	AT+CIPRECVLEN? +CIPRECVLEN:1,,,, OK

AT+CIPSNTPCFG – Sets the Configuration of SNTP

Command	Query Command: AT+CIPSNTPCFG? Function: checks the SNTP configuration.	Set Command: AT+CIPSNTPCFG=<enable> [,<tim ezone>][,<SNTP_server>, <SNTP_s erver1>,<SNTP_server2>] Function: sets the SNTP configuration.
Response	+CIPSNTPCFG:<enable>, < timezone>,<SNTP_server> [,<SNTP_server1>, <SNTP_server2>] OK	OK
Parameters	<enable>: : SNTP is disabled; 1: SNTP is enabled. <timezone>: time zone; range: [-11,13]; if SNTP is enabled, the <timezone> must be set; <SNTP server>: optional parameter indicating the first SNTP server; <SNTP server1>: optional parameter indicating the second SNTP server; <SNTP server2>: optional parameter indicating the third SNTP server.
Notes	If the <SNTP server> parameters are not set, servers “cn.ntp.org .cn”,”ntp.sjtu.edu.cn”, and “us.pool.ntp.org” (change to “0.pool.ntp.org”, “1.pool.ntp.org” and “2.pool.ntp.org”?) will be used by default.
Examples	AT+CIPSNTPCFG=1,8,”0.p ool.ntp.org”,”1.pool.nt p.org”,”2.pool.ntp.org”

AT+CIPSNTPTIME – Checks the SNTP Time

Query Command	AT+CIPSNTPTIME?
Response	+CIPSNTPTIME:<time> OK
Parameters	<time>: SNTP time OK
Examples	AT+CWMODE=1 //set as station mode AT+CWJAP=”DemoAP”,”password” //connect to router, access the internet AT+CIPSNTPCFG=1,8 //set time zone AT+CIPSNTPTIME? //get time For example: +CIPSNTPTIME:Thu Aug 04 14:48:05 2019 OK

AT+CIPDNS_CUR – Sets User-defined DNS Servers, Configuration Not Saved to Flash

Command	Query Command: AT+CIPDNS_CUR? Function: gets the current DNS server.	Set Command: AT+CIPDNS_CUR=<enable> [,<DNS_server>, <DNS_server1>] Function: sets user-defined DNS servers.
Response	[+CIPDNS_CUR:<DNS server0>] [+CIPDNS_CUR:<DNS server1>] OK	OK
Parameters	<enable>: : disables user-defined DNS servers; 1: enables user-defined DNS servers. <DNS server>: optional parameter indicating the first DNS server; <DNS server1>: optional parameter indicating the second DNS server;
Notes	For command: AT+CIPDNS_CUR= (disable user-defined DNS servers), “28.67.222.222” will be used as DNS server by default. And the DNS server may change according to the configuration of the router the BFQ4004 is connected to. For command: AT+CIPDNS_CUR=1 (enable user-defined DNS servers, but the <DNS server> parameters are not set), servers “28.67.222.222” will be used as DNS server by default. <DNS server> and <DNS server1> cannot be set to the same server.
Examples	AT+CIP DNS_CUR=1,”28.67.22.22”

AT+CIPDNS_DEF – Sets User-defined DNS Servers, Configuration Saved to Flash

Command	Query Command: AT+CIPDNS_DEF? Function: gets the current DNS server.	Set Command: AT+CIPDNS_DEF=<enable> [,<DNS_server>, <DNS_server1>] Function: sets user-defined DNS servers.
Response	[+CIPDNS_DEF:<DNS server0>] [+CIPDNS_DEF:<DNS server1>] OK	OK
Parameters	<enable>: : disables user-defined DNS servers; 1: enables user-defined DNS servers. <DNS server>: optional parameter indicating the first DNS server; <DNS server1>: optional parameter indicating the second DNS server;
Notes	For command: AT+CIPDNS_DEF= (disable user-defined DNS servers), “28.67.222.222” will be used as DNS server by default. And the DNS server may change according to the configuration of the router the BFQ4004 is connected to. For command: AT+CIPDNS_DEF=1 (enable user-defined DNS servers, but the <DNS server> parameters are not set), servers “28.67.222.222” will be used as DNS server by default. <DNS server> and <DNS server1> cannot be set to the same server.
Examples	AT+CIP DNS_DEF=1,”28.67.22.22”

HTTP-Related AT Commands

Overview

Commands	Description
AT+CHTTPURL	Set HTTP server port and address.
AT+CHTTPPH	Set path of POST/GET.
AT+CHTTPTP	Set command type of HTTP (GET or POST).
AT+CHTTPDT	Set name and value pair of data in HTTP.
AT+CHTTPTR	Send HTTP package and return received data.

Command Descriptions

AT+CHTTPURL – Sets HTTP Server Port and Address

Command	Query Command: AT+CHTTPURL? Function: gets the current port and IP address of the HTTP server.	Set Command: AT+CHTTPURL=<port>, <IP_address> Function: sets port and IP address of the target HTTP server.
Response	+CHTTP URL=<port>,<IP_address> OK	OK or <error_code>
Parameters	<port>: a number representing the port of the HTTP server. <IP_address>: a string representing the IP address or domain name of the HTTP server. <error_code>: a hex number in the form of “x7+Standard HTTP error code”.
Notes	If resource is not found, standard HTTP error code = 404, the set command would return the following error code: x7194 Because hex(x7+44)=0x7194 For a complete list of standard HTTP/1.1 error codes please refer to: RFC 2616: https://tool s.ietf.org/html/rfc2616
Examples	AT+C HTTPURL=8,”192.168..18”

AT+CHTTPPH – Sets Path of POST/GET

Command	Query Command: AT+CHTTPPH? Function: gets paths of POST/GET.	Set Command: AT+CHTTPPH=<path> Function: sets path of POST/GET.
Response	+CHTTPPH=<path> OK	OK
Parameters	<path>: a string representing the path of POST/GET.
Examples	AT+CHTTPPH=”/userLogin”

AT+CHTTPCTP – Sets Command Type of HTTP (GET or POST)

Set Command	AT+CHTTPCTP=<type> Function: sets command type of either POST or GET.
Response	OK
Parameters	<type>: a number representing GET or POST command. : GET (default); 1: POST.
Examples	AT+CHTTPCTP=1

AT+CHTTPCDT – Sets Name and Value Pair of Data in HTTP

Set Command	AT+CHTTPCDT=<name>,<value> Function: sets name and value pair of data in HTTP.
Response	OK
Parameters	<name>: a string representing the name of the data; <value>: a string representing the value corresponding to the name.
Examples	AT+CHTTPCTP=”username”,”admin”

AT+CHTTPTR – Sends HTTP Package and Return Received Data

Execute Command	AT+CHTTPTR Function: sends HTTP package and return received data.
Response	<reply_data> OK or <error_code>
Parameters	<reply_data>: data received from HTTP server. <error_code>: a hex number in the form of “x7+Standard HTTP error code”.
Notes	If resource is not found, standard HTTP error code = 404, the set command would return the following error code: x7194 Because hex(x7+44)=0x7194 For a complete list of standard HTTP/1.1 error codes please refer to: RFC 2616: https://tools.ietf.org/html/rfc2616
Examples	AT+CHTTPTR

Example operation: (is this correct?)

GET:

AT+CHTTPURL=8,”192.168..18”

AT+CHTTPPH=”/usr/local/http”

AT+CHTTPTP=0

AT+CHTTPTR

<reply_data> // GET data

POST:

AT+CHTTPURL=8,”192.168..18”

AT+CHTTPPH=”/usr/local/http”

AT+CHTTPTP=1

AT+CHTTPCDT=”field1”,”value1” // only 1 name-value pair at a time

AT+CHTTPTR

AT+CHTTPCDT=”field2”,”value2”

AT+CHTTPTR

…

Espressif’s HTTP commands:

AT+HTTPCLIENT=<opt>,<content-type>,[<url>],[<host>],[<path>],<transport_type>,[<data>][,”http_req_header”][,”http_req_header”][…]

AT+HTTPGETSIZE

AT+HTTPGETSIZE=<url>

Should we follow their commands?

Internet-of-Things (IoT)-Related AT Commands

MQTT Commands Overview

Commands	Description
AT+CMQNEW
AT+CMQCON
AT+CMQDISCON
AT+CMQSUB
AT+CMQUNSUB
AT+CMQPUB
AT+CMQTTSNEW
AT+CMQTTSNEWEXT

CoAP Commands Overview

Commands	Description
AT+CCOAPNEW
AT+CCOAPSEND
AT+CCOAPCSEND
AT+CCOAPDEL

TLS Commands Overview

Commands	Description
AT+CTLSCFG
AT+CTLSCONN
AT+CTLSCLOSE
AT+CTLSSEND
AT+CTLSRECV
AT+CSETCA

AWS IoT Core AT Commands

Customizing AT Firmware

Compiling AT project

If users want to customize AT source code, or add customized AT commands, please copy the folder “at” in the examples to the root directory of the corresponding BFQ4004 SDK , and then enter BFQ4004_SDK/at folder to develop and compile the custom AT project. For details, please refer to BFQ4004 Getting Started Guide.

Customize AT Functions

• OTA：

The official AT firmware launched by BeeFi supports the command AT+CIUPDATE by default, which helps update AT firmware to the latest version from BeeFi Cloud.

For the customized AT firmware, users have to implement this function by themselves to update the firmware from their own cloud. Please refer to the OTA example detailed inat_upgrade.c.

• [STRIKEOUT:SmartConfig：]

[STRIKEOUT:The official AT firmware launched by Espressif supports the commands AT+CWSTARTSMART and AT+CWSTOPSMART.]

[STRIKEOUT:If users don’t need SmartConfig, you can compile AT Project and disable CONFIG_AT_SMARTCONFIG_COMMAND_ENABLE in user_config.h for smaller bin size and more memory.]

Add User-defined AT Commands

TBD

Revision History

Revision	Description	Date
V0.1.0	Initial internal review version	2020-07-26

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