ESP32-C2 AT Release v3.0.0.0

Documentation for Release v3.0.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v3.0.0.0/esp32c2/index.html

The firmwares:

ESP32-C2-4MB_AT_Bin_V3.0.0.0.zip
ESP32-C2-2MB_AT_Bin_V3.0.0.0.zip

ESP32-C2 AT v3.0.0.0 is the first released version of AT firmware for ESP32-C2.

Feature

Basic AT Commands

• AT: Test AT startup.
• AT+RST: Restart a module.
• AT+GMR: Check version information.
• AT+CMD: List all AT commands and types supported in current firmware.
• AT+GSLP: Enter Deep-sleep mode.
• ATE: Configure AT commands echoing.
• AT+RESTORE: Restore factory default settings of the module.
• 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.
• AT+SYSRAM: Query current remaining heap size and minimum heap size.
• AT+SYSMSG: Query/Set System Prompt Information.
• AT+SYSFLASH: Query/Set User Partitions in Flash.
• AT+RFPOWER: Query/Set RF TX Power.
• AT+SYSROLLBACK: Roll back to the previous firmware. (ESP32C2-4MB only)
• AT+SYSTIMESTAMP: Query/Set local time stamp.
• AT+SYSLOG: Enable or disable the AT error code prompt.
• AT+SLEEPWKCFG: Query/Set the light-sleep wakeup source and awake GPIO.
• AT+SYSSTORE: Query/Set parameter store mode.
• AT+SYSREG: Read/write the register.

Wi-Fi AT Commands

• AT+CWMODE: Set the Wi-Fi mode (Station/SoftAP/Station+SoftAP).
• AT+CWSTATE: Query the Wi-Fi state and Wi-Fi information.
• AT+CWJAP: Connect to an AP.
• AT+CWRECONNCFG: Query/Set the Wi-Fi reconnecting configuration.
• AT+CWLAPOPT: Set the configuration for the command AT+CWLAP.
• AT+CWLAP: List available APs.
• AT+CWQAP: Disconnect from an AP.
• AT+CWSAP: Query/Set the configuration of an ESP SoftAP.
• AT+CWLIF: Obtain IP address of the station that connects to an ESP SoftAP.
• AT+CWQIF: Disconnect stations from an ESP SoftAP.
• AT+CWDHCP: Enable/disable DHCP.
• AT+CWDHCPS: Query/Set the IP addresses allocated by an ESP SoftAP DHCP server.
• AT+CWAUTOCONN: Connect to an AP automatically when powered on.
• AT+CWAPPROTO: Query/Set the 802.11 b/g/n protocol standard of SoftAP mode.
• AT+CWSTAPROTO: Query/Set the 802.11 b/g/n protocol standard of station mode.
• AT+CIPSTAMAC: Query/Set the MAC address of an ESP station.
• AT+CIPAPMAC: Query/Set the MAC address of an ESP SoftAP.
• AT+CIPSTA: Query/Set the IP address of an ESP station.
• AT+CIPAP: Query/Set the IP address of an ESP SoftAP.
• AT+CWSTARTSMART: Start SmartConfig.
• AT+CWSTOPSMART: Stop SmartConfig.
• AT+WPS: Enable the WPS function.
• AT+MDNS: Configure the mDNS function.
• AT+CWHOSTNAME: Query/Set the host name of an ESP station.
• AT+CWCOUNTRY: Query/Set the Wi-Fi Country Code.

TCP/IP AT Commands

• AT+CIPV6: Enable/disable the network of Internet Protocol Version 6 (IPv6).
• AT+CIPSTATUS: Obtain the TCP/UDP/SSL connection status and information.
• AT+CIPDOMAIN: Resolve a Domain Name.
• AT+CIPSTART: Establish TCP connection, UDP transmission, or SSL connection.
• AT+CIPSTARTEX: Establish TCP connection, UDP transmission, or SSL connection with an automatically assigned ID.
• [Passthrough Mode Only] +++: Exit the passthrough mode.
• AT+CIPSEND: Send data in the normal transmission mode or Wi-Fi passthrough mode.
• AT+CIPSENDL: Send long data in paraller in the normal transmission mode.
• AT+CIPSENDLCFG: Set the configuration for the command AT+CIPSENDL.
• AT+CIPSENDEX: Send data in the normal transmission mode in expanded ways.
• AT+CIPCLOSE: Close TCP/UDP/SSL connection.
• AT+CIFSR: Obtain the local IP address and MAC address.
• AT+CIPMUX: Enable/disable the multiple connections mode.
• AT+CIPSERVER: Delete/create a TCP/SSL server.
• AT+CIPSERVERMAXCONN: Query/Set the maximum connections allowed by a server.
• AT+CIPMODE: Query/Set the transmission mode.
• AT+SAVETRANSLINK: Set whether to enter Wi-Fi passthrough mode on power-up.
• AT+CIPSTO: Query/Set the local TCP Server Timeout.
• AT+CIPSNTPCFG: Query/Set the time zone and SNTP server.
• AT+CIPSNTPTIME: Query the SNTP time.
• AT+CIPSNTPINTV: Query/Set the SNTP time synchronization interval.
• AT+CIPFWVER: Query the existing AT firmware version on the server.
• AT+CIUPDATE: Upgrade the firmware through Wi-Fi.
• AT+CIPDINFO: Set “+IPD” message mode.
• AT+CIPSSLCCONF: Query/Set SSL clients.
• AT+CIPSSLCCN: Query/Set the Common Name of the SSL client.
• AT+CIPSSLCSNI: Query/Set SSL client Server Name Indication (SNI).
• AT+CIPSSLCALPN: Query/Set SSL client Application Layer Protocol Negotiation (ALPN).
• AT+CIPSSLCPSK: Query/Set SSL client Pre-shared Key (PSK).
• AT+CIPRECONNINTV: Query/Set the TCP/UDP/SSL reconnection interval for the Wi-Fi passthrough mode.
• AT+CIPRECVMODE: Query/Set socket receiving mode.
• AT+CIPRECVDATA: Obtain socket data in passive receiving mode.
• AT+CIPRECVLEN: Obtain socket data length in passive receiving mode.
• AT+PING: Ping the remote host.
• AT+CIPDNS: Query/Set DNS server information.
• AT+CIPTCPOPT: Query/Set the socket options.

Bluetooth® Low Energy AT Commands (ESP32C2-4MB only)

• AT+BLUFI: Start or Stop BluFi.
• AT+BLUFINAME: Query/Set BluFi device name.
• AT+BLUFISEND: Send user-customized data over BluFi.

MQTT AT Commands

• AT+MQTTUSERCFG: Set MQTT user configuration
• AT+MQTTLONGCLIENTID: Set MQTT client ID
• AT+MQTTLONGUSERNAME: Set MQTT username
• AT+MQTTLONGPASSWORD: Set MQTT password
• AT+MQTTCONNCFG: Set configuration of MQTT connection
• AT+MQTTALPN: Set MQTT Application Layer Protocol Negotiation (ALPN)
• AT+MQTTCONN: Connect to MQTT Brokers
• AT+MQTTPUB: Publish MQTT Messages in string
• AT+MQTTPUBRAW: Publish MQTT messages in binary
• AT+MQTTSUB: Subscribe to MQTT topics
• AT+MQTTUNSUB: Unsubscribe from MQTT topics
• AT+MQTTCLEAN: Close MQTT connections

HTTP AT Commands (ESP32C2-4MB only)

• AT+HTTPCLIENT: Send HTTP Client Request
• AT+HTTPGETSIZE: Get HTTP Resource Size
• AT+HTTPCGET: Get HTTP Resource
• AT+HTTPCPOST: Post HTTP data of specified length
• AT+HTTPCPUT: Put HTTP data of specified length
• AT+HTTPURLCFG: Set/Get long HTTP URL

User AT Commands

• AT+USERRAM: Operate user’s free RAM.
• AT+USEROTA: Upgrade the firmware according to the specified URL.
• AT+USERWKMCUCFG: Configure how AT wakes up MCU.
• AT+USERMCUSLEEP: MCU indicates its sleep state.
• AT+USERDOCS: Query the ESP-AT user guide for current firmware.