github espressif/esp-at v2.1.0.0-rc2_esp32

latest releases: v3.0.0.0, v2.4.2.0, v2.4.1.0...
pre-release3 years ago

#ESP32-AT Relase v2.1.0.0-rc2
Documentation for Relase v2.1.0.0 is available at
You can download the firmwares to try them, which support OTA from espressif‘s server.

ESP32-AT v2.1.0.0-rc2 is a major update for ESP32-AT v2.0.0.0.

This is the list of changes since ESP32-AT Relase v2.0.0.0.

SDK Update and Known issue

  • Wakeup fail from light sleep


  • esp-idf version update to release v4.0(e7ac221b)

1.1 WiFi

  • AT+CWCOUNTRY: configurate and query the WiFi country code
  • AT+CWSTAPROTO: set and query the 802.11 b/g/n protocol standard of station mode
  • AT+CWAPPROTO: set and query the 802.11 b/g/n protocol standard of SoftAP mode
  • Support automatically connect to AP in the command AT+CWMODE after changed to station mode
  • Support scan mode configuration in the command AT+CWJAP

1.2 TCP/IP

  • AT+CIPTCPOPT: configurate and query the TCP socket options, include SO_LINGER, TCP_NODELAY, SO_SNDTIMEO options
  • Support multicast address in the command AT+CIPSTART

1.3 TLS

  • AT+CIPSSLCCN: configurate and query SSL client common name(CN)
  • AT+CIPSSLCSNI: configurate and query SSL client server name indication(SNI)
  • AT+CIPSSLCALPN: configurate and query SSL client application layer protocol negotiation(ALPN)
  • AT+CIPSSLCPSK: configurate and query SSL client pre-shared key(PSK)

1.4 BT & BLE

  • Enable BLE HID commands by default
  • AT+BTCOD: Configure class of BT device
  • AT+BLUFI: start and stop BLUFI function(configure Wi-Fi information by ble)
  • AT+BLEADVDATAEX: set BLE advertising data automatically
  • Add AT+BTSCANMODE query command: query BT scan mode
  • Add AT+BLEGATTSSRVCRE multiple services
  • Support scan filter in the command AT+BLESCAN
  • Support discoverable but not connectable mode in the command AT+BTSCANMODE
  • Support retransmission for BT SPP
  • Support some BT and BLE parameters store to flash
  • Support BLE connection callback for user to customize it

1.5 MQTT

  • Enable MQTT commands by default
  • AT+MQTTCLIENTID: set and query MQTT client ID
  • AT+MQTTUSERNMAE: set and query MQTT username
  • AT+MQTTPASSWORD: set and query MQTT password
  • Add AT+MQTTUSERCFG query command
  • Add AT+MQTTCONNCFG query command
  • Add AT+MQTTUSERNAME query command
  • Add AT+MQTTCLIENDID query command
  • Add AT+MQTTPASSWORD query command
  • Add MQTT authentication method configuration in menuconfig

1.6 HTTP

  • Enable HTTP commands by default
  • AT+HTTPGETSIZE: get HTTP resource size
  • Support custom request headers in the command AT+HTTPCLIENT

1.7 System

  • AT+SLEEPWKCFG: configurate the light-sleep wakeup source and awake GPIO
  • AT+SYSSTORE: control if store parameter into flash
  • Separate WPS, PING, SmartConfig and MDNS commands in menuconfig
  • Support cmake to compile esp-at project
  • OTA use esp-tls instead of openSSL
  • Add uart port configuration in the factory parameter binary
  • change factory parameter version to v2

1.8 Example

  • Add STM32 example for SDIO SPI AT
  • Add STM32 SDIO host example

2. Bugfix

2.1 WiFi

  • Fix AT+RFPOWER set failed when disable WiFi command
  • Fix AT+CWLAP scan fail when WiFi is connecting
  • Fix missing WiFi status information if AT+CIPMODE=1
  • Fix WiFi state is error after AT+CWJAP failed
  • Fix AT+CIPRECONNINTV set range [1, 36000]

2.3 UART

  • Fix UART parity configuration error

2.4 BT & BLE

  • Fix crash if the notification value of ble is too long
  • Fix BLE service discovery works bad in multiple connections status
  • Fix crash when re-create BLE services
  • Fix re-enter BLE SPP fail
  • Fix AT+BLESCAN=2 return OK
  • Fix hid init fail
  • Fix the data is lost when in BLE SPP
  • Fix exit from bluetooth throughput mode failed
  • Fix gatt server re-enter spp mode fail
  • Fix write characteristic value fail
  • Fix exit automatically reconnect status fail after terminating BLE spp mode
  • Fix establish a new connection fail after ble connection timeout
  • Fix BT default device name is empty
  • Fix BT scan result is out of order
  • Fix BT SPP exit throughput mode fail after disconnection
  • Fix some MAC address informations is missing quotes

2.5 MQTT

  • Fix crash when running AT+MQTTCONN?
  • Fix crash when running AT+MQTTPUB if the data is too long
  • Fix block when running AT+MQTTPUB
  • Fix crash when MQTT is disconnected
  • Fix MQTT can not automatically reconnect
  • Fix crash when running AT+MQTTPUBRAW if the topic length is too long
  • Fix the length of the topic is error if the received MQTT data is too large
  • Fix AT+MQTTPUB failed when WiFi is reconnected
  • Fix the length of the data for AT+MQTTPUBRAW is limited
  • Fix the state responded by AT+MQTTCONN? is error when WiFi is reconnected
  • Fix AT+MQTTCONN fails when MQTT close and re-build the link
  • Fix crash when running AT+MQTTCONNCFG if mqtt is disconnected
  • Fix crash when mqtt is established if Wi-Fi is reconnected

2.6 HTTP

  • Fix print the data downloaded by HTTP error
  • Fix check if http transport type is valid in the command AT+HTTPCLIENT
  • Fix crash if some URL is special in the command AT+HTTPCLIENT

2.7 System

  • Fix busy sometimes after AT+CIPSEND returned OK
  • Fix incorrect information in the factory_parameter.log if module name not defined
  • Fix AT command end with CR responses OK
  • Fix missing "+QUIT" when quit transmission mode if AT+SYSMSG=1
  • Fix AT+CIPSTATUS state unmatched when WiFi disconnected
  • Fix AT+SYSMSG parameter check

2.8 DNS

  • Fix the last DNS configuration is error when running AT+CIPDNS

2.9 PING

  • Fix it returns ERROR when running AT+PING


  • Optimize sockets process workflow
  • Optimize AT+CIPSTATUS command process
  • Optimize transmit terminal process
  • check the default max tx power validity

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