AT Command Set Comparison

[中文]

This document lists the differences between the AT commands supported by the old NONOS-AT version and those by the new ESP-AT version that you should pay attention to before migrating from the old to new.

  • NONOS-AT: Not recommended version for ESP8266 series of chips since its base SDK, ESP8266_NONOS_SDK, is no longer updated.
  • ESP-AT: Recommended version. It supports all series of chips and a richer set of commands compared with NONOS-AT, such as Bluetooth commands, Bluetooth Low Energy commands, Ethernet commands, driver commands, and so on. For more details about ESP-AT, please refer to What is ESP-AT and AT Binary Lists.

Note

The table below covers all the commands supported by the NONOS-AT, but not all by ESP-AT. See Section AT Command Set for a full list of commands supported by ESP-AT.

The links in the first column of the table point to ESP-AT commands.

AT Command Set Comparison
Command Function NONOS-AT ESP-AT
AT Test AT startup
AT+RST Restart a module
AT+GMR Check version information
AT+GSLP Enter Deep-sleep mode
ATE AT commands echoing
AT+RESTORE Restore factory default settings
AT+UART_CUR Current UART configuration, not saved in flash
AT+UART_DEF Default UART configuration, saved in flash
AT+SLEEP Set the sleep mode
1: light sleep
2: modem sleep
ESP8266 ✅
ESP32 ✅
ESP32-S2 ❌
Note [1]
AT+WAKEUPGPIO Wakeup from light sleep on GPIO interrupt
[3] Similar command: AT+SLEEPWKCFG
AT+RFPOWER Set RF TX Power
Range: [0,82]
Unit: 0.25 dBm
[2]
AT+RFVDD Set RF TX power according to VDD33
AT+SYSRAM Query the remaining space of RAM ✅ Added the parameter of minimum heap size
AT+SYSADC Read ADC value
AT+SYSIOSETCFG Set IO working mode
AT+SYSIOGETCFG Query IO working mode
AT+SYSGPIODIR Set GPIO direction
AT+SYSGPIOWRITE Set GPIO output level
AT+SYSGPIOREAD Read GPIO input level
AT+SYSMSG Set system prompt info
AT+SYSMSG_CUR Set system prompt info, not saved in flash
[3] Similar command: AT+SYSMSG
AT+SYSMSG_DEF Set default system prompt info, saved in flash
[3] Similar command: AT+SYSMSG
AT+CWMODE Set Wi-Fi mode ✅ Added automatic connection after mode switching
AT+CWMODE_CUR Set current Wi-Fi mode, not saved in flash
[3] Similar command: AT+CWMODE
AT+CWMODE_DEF Set default Wi-Fi mode, saved in flash
[3] Similar command: AT+CWMODE
AT+CWJAP Connect to an AP ✅ Added more functionality
AT+CWJAP_CUR Connect to an AP, not saved in flash
[3] Similar command: AT+CWJAP
AT+CWJAP_DEF Connect to an AP, saved in flash
[3] Similar command: AT+CWJAP
AT+CWLAPOPT Set configuration for AT+CWLAP ✅ Added more functionality
AT+CWLAP List available APs ✅ Response is different
AT+CWQAP Disconnect from an AP
AT+CWSAP Set softAP parameters
AT+CWSAP_CUR Set softAP parameters, not saved in flash
[3] Similar command: AT+CWSAP
AT+CWSAP_DEF Set softAP parameters, saved in flash
[3] Similar command: AT+CWSAP
AT+CWLIF Query info of the station that connects to a softAP
AT+CWDHCP Set DHCP
AT+CWDHCP_CUR Set DHCP, not saved in flash
[3] Similar command: AT+CWDHCP
AT+CWDHCP_DEF Set DHCP, saved in flash
[3] Similar command: AT+CWDHCP
AT+CWDHCPS Set the IP addresses allocated by an ESP softAP DHCP server
AT+CWDHCPS_CUR Same as above, but not saved in flash
[3] Similar command: AT+CWDHCPS
AT+CWDHCPS_DEF Same as above, but saved in flash
[3] Similar command: AT+CWDHCPS
AT+CWAUTOCONN Connect to an AP automatically when powered on
AT+CIPSTAMAC Set the MAC address of an ESP station
AT+CIPSTAMAC_CUR Same as above, but not saved in flash
[3] Similar command: AT+CIPSTAMAC
AT+CIPSTAMAC_DEF Same as above, but saved in flash
[3] Similar command: AT+CIPSTAMAC
AT+CIPAPMAC Set the IP address of an ESP softAP
AT+CIPAPMAC_CUR Same as above, but not saved in flash
[3] Similar command: AT+CIPAPMAC
AT+CIPAPMAC_DEF Same as above, but saved in flash
[3] Similar command: AT+CIPAPMAC
AT+CIPSTA Set the IP address of an ESP station
AT+CIPSTA_CUR Same as above, but not saved in flash
[3] Similar command: AT+CIPSTA
AT+CIPSTA_DEF Same as above, but saved in flash
[3] Similar command: AT+CIPSTA
AT+CIPAP Set the IP address of an ESP softAP
AT+CIPAP_CUR Same as above, but not saved in flash
[3] Similar command: AT+CIPAP
AT+CIPAP_DEF Same as above, but saved in flash
[3] Similar command: AT+CIPAP
AT+CWSTARTSMART Start SmartConfig
AT+CWSTOPSMART Stop SmartConfig
AT+CWSTARTDISCOVER Enable the mode that an ESP device can be found by WeChat
AT+CWSTOPDISCOVER Disable the mode that an ESP device can be found by WeChat
AT+WPS Enable the WPS function
AT+MDNS Configure the mDNS function
AT+CWJEAP Connect to a WPA2 Enterprise AP
ESP8266 ❌
ESP32 ✅
ESP32-S2 ❌
AT+CWJEAP_CUR Same as above, but not saved in flash
AT+CWJEAP_DEF Same as above, but saved in flash
AT+CWHOSTNAME Set the host name of an ESP station
AT+CWCOUNTRY Set the Wi-Fi Country Code
AT+CWCOUNTRY_CUR Same as above, but not saved in flash
[3] Similar command: AT+CWCOUNTRY
AT+CWCOUNTRY_DEF Same as above, but saved in flash
[3] Similar command: AT+CWCOUNTRY
AT+CIPSTATUS Obtain the TCP/UDP/SSL connection status and info
AT+CIPDOMAIN Resolve a domain name
AT+CIPSTART Establish a TCP/UDP/SSL connection
AT+CIPSSLSIZE Set SSL buffer size
AT+CIPSSLCCONF Set SSL clients ✅ Parameters are different
AT+CIPSEND Send data
AT+CIPSENDEX Send data of specified length, or use \0 to trigger data transmission
AT+CIPSENDBUF Write data into the TCP-Send-Buffer [3]
AT+CIPBUFRESET Reset the segment ID count [3]
AT+CIPBUFSTATUS Query the status of the TCP-Send-Buffer [3]
AT+CIPCHECKSEQ Query if a specific segment was successfully sent [3]
AT+CIPCLOSEMODE Set the close mode of TCP connection [3]
AT+CIPCLOSE Close TCP/UDP/SSL connection
AT+CIFSR Obtain the local IP address
AT+CIPMUX Set multiple connections
AT+CIPSERVER Create a TCP/SSL server ✅ SSL server not supported ✅ SSL server supported for ESP32 and ESP32-S2, not for ESP8266
AT+CIPSERVERMAXCONN Set the maximum connections allowed by a server
AT+CIPMODE Set the transmission mode
AT+SAVETRANSLINK Set whether to enter Wi-Fi Passthrough Mode on power-up
AT+CIPSTO Set the local TCP server timeout
AT+PING Ping the remote host
AT+CIUPDATE Upgrade the firmware through Wi-Fi ✅ More parameters supported
AT+CIPDINFO Show the remote IP and port with +IPD
AT+CIPRECVMODE Set TCP Receive Mode
AT+CIPRECVDATA Get TCP data in passive receive mode ✅ Response is different
AT+CIPRECVLEN Get TCP data length in passive receive mode
AT+CIPSNTPCFG Set the time zone and SNTP server ✅ Added more functionality
AT+CIPSNTPTIME Query SNTP time
AT+CIPDNS Set DNS server information
AT+CIPDNS_CUR Same as above, but not saved in flash
[3] Similar command: AT+CIPDNS
AT+CIPDNS_DEF Same as above, but saved in flash
[3] Similar command: AT+CIPDNS
AT+SYSFLASH Set user partitions in flash

Tip: Click the footnote number to jump (back) to where it is marked in the table above.

[1]

AT+SLEEP in ESP-AT:

  • ESP8266 and ESP32 ✅
    • 1: modem sleep by DTIM
    • 2: light sleep
    • 3: modem sleep by listen interval
  • ESP32-S2 ❌
[2]

AT+RFPOWER in ESP-AT:

  • ESP8266 ✅. Range: [40,82]. Unit: 0.25 dBm
  • ESP32 ✅. Range: [40,78]. Unit: 0.25 dBm. Support Bluetooth LE.
  • ESP32-S2 ✅. Range: [40,78]. Unit: 0.25 dBm
[3](1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30) This command will not be added to the ESP-AT version.