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  • NONOS-AT: Not recommended version for ESP8266 series of chips since its base SDK, ESP8266_NONOS_SDK, is no longer updated.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 ❌ 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

❌

✅

Note 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 ❌

Note 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

Note 3: This command will not be added to the ESP-AT version.

Provide feedback about this document