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Showing content from https://github.com/espressif/esp-at/releases/tag/v2.2.0.0_esp32 below:

Release v2.2.0.0_esp32 · espressif/esp-at · GitHub

Documentation for v2.2.0.0 is available at https://docs.espressif.com/projects/esp-at/en/release-v2.2.0.0_esp32/
You can download the firmwares to use them, which support OTA from espressif‘s server.

ESP32-WROOM_AT_V2.2.0.0.zip
ESP32-WROVER_AT_V2.2.0.0.zip
ESP32-SOLO_AT_V2.2.0.0.zip
ESP32-PICO-D4_AT_V2.2.0.0.zip
ESP32-MINI-1_AT_Bin_V2.2.0.0.zip

ESP32-AT v2.2.0.0 is a major update for ESP32-AT v2.1.0.0.

This is the list of changes since release v2.1.0.0:

• esp-idf version updated to release v4.2 (efa6eca)
• Compiler upgraded from v5.2.0 to v8.4.0
• AT+CIPDOMAIN: Double quotation marks are added to the string parameters in the response
• AT+BLESCAN: Double quotation marks are added to the mac address parameter in the response
• AT commands supports IPv6 network now

• Before start the softAP, AT+DHCP=0,2 command cannot disable DHCP (please disable DHCP after the softAP started)
• It may fail to create BT connection again after BT disconnect

• AT+CWRECONNCFG: Support to configure Wi-Fi reconnect interval and maximum retry times
• AT+CWLAPOPT: Support to filter the scanned result by rssi and authmode
• AT+CWJAP: Limit the range of listen interval to [1, 100]
• AT+WPS: Support authmode floor configuration
• AT+CWSMARTSTART: Support authmode floor configuration
• AT+CWLAP: Support the information of 802.11 b/g/n in the response
• AT+CWJAP: Support to configure timeout and pmf, and connect the last recorded AP
• AT+CWSTATE: New Command to query Wi-Fi state

• AT+SYSMSG: Extended BIT2 parameter for passthrough mode
• AT+CIUPDATE: Support to upgrade custom partitions and asynchronous OTA
• AT+PING: Added an error message TIMEOUT for incorrect DNS
• Modified tcp mss and wnd to improve compatibility
  • Modified tcp wnd, from 5744 to 5760
  • Modified tcp snd buf, from 5744 to 5760
• Disabled setting AT+CIPSSLCCN, AT+CIPSSLCSNI, AT+CIPSSLCALPN, AT+CIPSSLCPSK if the link is already connected
• AT+CIPSERVER: Added close_all_clients parameter to close all connections with the server created by AT+CIPSERVER
• The following AT commands supports IPv6 since v2.2.0.0
  • AT+CIPV6
  • AT+CIPSTATUS
  • AT+CIPDOMAIN
  • AT+CIPSTART
  • AT+CIPSTARTEX
  • AT+CIPSERVER
  • AT+SAVETRANSLINK
  • AT+PING
  • AT+CIPDNS
  • AT+CIPSTA
  • AT+CIPAP
  • AT+CIFSR

• AT+CIPSNTPCFG: Support to configure half timezone offset
• AT+MQTTCONNCFG, AT+MQTTPUB, AT+MQTTPUBRAW, AT+MQTTPUB, AT+MQTTUNSUB command supports 128 bytes topic
• AT+WEBSERVER: New command to support Wi-Fi provisioning via SoftAP and Captive Portal
• AT+HTTPCLIENT: Support chunked data
• AT+HTTPCLIENT: content-type parameter can be omitted now
• AT+HTTPCPOST: New command to support long data post
• Added qcloud support

• AT+CMD: New command to query the supported AT commands list
• AT+USERRAM: New command to alloc ram for host mcu to use it
• AT+SYSREG: New command to read and write registers
• AT+SYSRAM: Support to query the minimum heap size
• AT+GMR: Added chip platform information in the response
• Added ESP32-D2WD, ESP32-MINI-1 module support

Added the following new commands:

• AT+DRVADC: Read ADC channel value
• AT+DRVPWMINIT: Initialize PWM driver
• AT+DRVPWMDUTY: Set PWM duty
• AT+DRVPWMFADE: Set PWM fade
• AT+DRVI2CINIT: Initialize I2C master driver
• AT+DRVI2CRD: Read I2C data
• AT+DRVI2CWRDATA: Write I2C data
• AT+DRVI2CWRBYTES: Write no more than 4 bytes I2C data
• AT+DRVSPICONFGPIO: Configure SPI GPIO
• AT+DRVSPIINIT: Initialize SPI master driver
• AT+DRVSPIRD: Read SPI data
• AT+DRVSPIWR: Write SPI data

• AT+BTPOWER: Support to set BT tx power
• AT+BLUFI: Support authmode floor configuration
• AT+SYSMSG: Extended BIT2 parameter to support BLE and BT SPP messages
• GATT Server supports service discovery
• GATT client supports to create a local service
• BLE supports to send long length packets of notify and indicate

• Fixed AT+CWLAP issues
  • Fixed AT+CWLAP returned ERROR when total active scan time was more than 15 seconds
  • Fixed AT+CWLAP did not return ap in the response sometimes
  • Fixed AT+CWLAP blocked more the 10 seconds sometimes
  • Fixed AT+CWLAP rssi filter parameter could not work sometimes
  • Fixed AT+CWLAP could not scan valid ap by ssid and bssid
• Fixed the issue that AT+CWMODE=1,1 could not auto-connect to AP when Wi-Fi mode switched from WIFI_MODE_NULL
• Fixed the issue that AT+CWJAP may return the wrong error number
• Fixed AT+WPS failed on multiple ap credentials case
• Fixed AT+CIPSTA/AT+CIPAP could set the wrong IP address due to the lack of rigorous address check

• Fixed wrong state of AT+CIPSTATUS command
• Fixed data error in passthrough mode with 2Mbps baud rate
• Fixed AT+CIPRECONNINTV did not work immediately
• Fixed that the received data was incomplete if the data was too large in softAP mode
• Fixed AT+CIPSENDEX data was truncated in advance
• Fixed AT+CIPSEND returned ERROR sometimes
• Fixed crash when link id < 0
• Fixed AT+CIPMUX=0 set error when all connections closed
• Fixed SSL link may not disconnect when IP address changed
• Fixed potential blocking when hardware flow control enabled
• Fixed an issue of mistakenly printing "CLOSED" or "+LINK_CONN"
• Fixed tcp server could not work again if the link closed and opened repeatedly
• Fixed AT+SAVETRANSLINK could not work sometimes
• Fixed AT+CIPSERVER could set mode to 2
• Fixed AT+CIPSTART SSL connect failed if disabled ALPN by AT+CIPSSLCALPN=1,0
• Fixed tcp send data lost in passthrough mode
• Fixed AT+CIUPDATE failed over SSL if the version parameter was specified

• Fixed AT+MQTTCONN returned ERROR when checking common name
• Fixed AT+MQTTUSERCFG? crash after MQTT connected
• Fixed AT+CIPSSLCALPN query command caused to reboot due to memory coverage
• Fixed AT+MQTTCONN may cause wdt reset when input some special hostname
• Fixed the issue that AT+HTTPCLIENT url failed to be omitted

• Fixed compile error if disable BT and BLE
• Fixed compile error when only use BluFi
• Fixed AT+GSLP did not return OK sometimes
• Fixed AT+GSLP may return ERROR when setting a long deep sleep time
• Fixed AT+GSLP crash on PICO-D4 module
• Fixed wrong uart pins disabled before deep-sleep
• Fixed AT+SLEEPWKCFG did not check GPIO configuration issue
• Fixed the crash when sending command with one redundant character "" before "\r\n"
• Fixed AT+SLEEP=2 returned OK in softap mode
• Fixed AT+SLEEP=0 cause to crash
• Fixed silence firmware crash sometimes
• Fixed build fail when disable customized partition
• Fixed sdio read data error when length bigger than sdio list
• Fixed light sleep could not be woken up by GPIO due to DFS

• Fixed the failure to re-enter GATT server SPP mode
• Fixed the failure to write characteristic value
• Fixed that BLE connection timeout resulted in no new connection being created
• Fixed that BT default device name was empty
• Fixed that BT failed to output scan results sometimes
• Fixed the failure to exit the BT SPP mode even after disconnection
• Fixed that some MAC address information was missing quotes
• Fixed that BT device name overlength issue
• Fixed that BT & BLE deinit failed
• Fixed that classic BT could not discover some device names
• Fixed the failure to init BLE parameters: BLE device name, BLE advertising parameters, BLE scan parameters and response, and BLE connection parameters
• Fixed the incorrect message of AT+BTSTARTDISC
• Fixed the crash caused by deiniting A2DP profile
• Fixed the failure to detect incorrect BLE address type
• Added the message for A2DP connection failure
• Fixed the blufi name overlength issue
• Fixed the crash caused by multi-connection
• Fixed the crash caused by BLE connection failure
• Fixed the crash caused by disabling modem sleep
• Fixed the crash caused by deiniting BLE stack

• Added build.py script to simplify the compilation process and supported windows OS compilation
• Refactored application directory
• Removed deprecated GNU make
• Removed cmake warnings
• Supported spi & sdio example cmake
• Removed at_http_webserver example

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