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ESP_AT_Get_Started.md

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More supported modules, please referred to components/customized_partitions/raw_data/factory_param/factory_param_data.csv

ESP32 platform

Hardware Introduction

The WROOM32 Board sends AT commands through UART1 by default.

  • GPIO16 is RXD
  • GPIO17 is TXD
  • GPIO14 is RTS
  • GPIO15 is CTS

The debug log will output through UART0 by default, which TXD0 is GPIO1 and RXD0 is GPIO3, but user can change it in menuconfig if needed.

  • make menuconfig --> Component config --> ESP32-specific --> UART for console output

Notes: Please pay attention to conflict of the pin

  • If choose AT through HSPI, you can get the information of the hspi pin by make menuconfig --> Component config --> AT --> AT hspi settings
  • If enable AT ethernet support, you can get the information of the ethernet pin from ESP32_AT_Ethernet.md.

Compiling and flashing the project

Suppose you have completed the installation of the compiler environment for esp-idf, if not, you should completed it referring to https://docs.espressif.com/projects/esp-idf/en/v3.3/get-started/index.html#setup-toolchain, in order to compile esp-at project properly, please do the following additional steps:

step1:install python 2.7 or python 3.x 
step2:[install pip](https://pip.pypa.io/en/latest/installing/)  
step3:install the following python packages with pip: pip install pyyaml xlrd

Compiling the esp32-at is the same as compiling any other project based on the ESP-IDF:

  1. You can clone the project into an empty directory using command:
git clone --recursive https://github.com/espressif/esp-at.git
  1. rm sdkconfig to remove the old configuration and rm -rf esp-idf to remove the old esp-idf if you want to compile other esp platform AT.
  2. Set the latest default configuration by make defconfig.
  3. make menuconfig -> Serial flasher config to configure the serial port for downloading.
  4. make flash or make flash SILENCE=1 to compile the project and download it into the flash, and make flash SILENCE=1 will remove some logs to reduce firmware size.
  • Or you can call make to compile it, and follow the printed instructions to download the bin files into flash by yourself.
  • make print_flash_cmd can be used to print the addresses of downloading.
  • More details are in the esp-idf README.
  • If enable BT feature, the firmware size will be much larger, please make sure it does not exceed the ota partition size.
  1. make factory_bin to combine factory bin, by default, the factory bin is 4MB flash size, DIO flash mode and 40MHz flash speed. If you want use this command, you must fisrt run make print_flash_cmd | tail -n 1 > build/download.config to generate build/download.config.
  2. If the ESP32-AT bin fails to boot, and prints "ota data partition invalid", you should run make erase_flash to erase the entire flash.

ESP8266 platform

Hardware Introduction

The ESP8266 WROOM 02 Board sends AT commands through UART0 by default.

  • GPIO13 is RXD
  • GPIO15 is TXD
  • GPIO1 is RTS
  • GPIO3 is CTS

The debug log will output through UART1 by default, which TXD0 is GPIO2, but user can change it in menuconfig if needed.

  • make menuconfig --> Component config --> ESP8266-specific --> UART for console output

Compiling and flashing the project

Suppose you have completed the installation of the compiler environment for esp-idf, if not, you should completed it referring to https://docs.espressif.com/projects/esp8266-rtos-sdk/en/v3.2/get-started/index.html#setup-toolchain, in order to compile esp-at project properly, please do the following additional steps:

step1:install python 2.7 or python 3.x  
step2:[install pip](https://pip.pypa.io/en/latest/installing/)  
step3:install the following python packages with pip: pip install pyyaml xlrd

Compiling the ESP8266 AT is the same as compiling esp32-at:

  1. You can clone the project into an empty directory using command:
git clone --recursive https://github.com/espressif/esp-at.git
  1. Change the Makefile from
export ESP_AT_PROJECT_PLATFORM ?= PLATFORM_ESP32
export ESP_AT_MODULE_NAME ?= WROOM-32

to be

export ESP_AT_PROJECT_PLATFORM ?= PLATFORM_ESP8266 
export ESP_AT_MODULE_NAME ?= WROOM-02
  1. rm sdkconfig to remove the old configuration and rm -rf esp-idf to remove the old esp-idf if you want to compile other esp platform AT.
  2. Set the latest default configuration by make defconfig.
  3. make menuconfig -> Serial flasher config to configure the serial port for downloading.
  4. make flash or make flash SILENCE=1 to compile the project and download it into the flash, and make flash SILENCE=1 will remove some logs to reduce firmware size.
  • Or you can call make to compile it, and follow the printed instructions to download the bin files into flash by yourself.
  • make print_flash_cmd can be used to print the addresses of downloading.
  • More details are in the esp-idf README.
  1. make factory_bin to combine factory bin, by default, the factory bin is 4MB flash size, DIO flash mode and 40MHz flash speed. If you want use this command, you must fisrt run make print_flash_cmd | tail -n 1 > build/download.config to generate build/download.config.
  2. If the ESP32-AT bin fails to boot, and prints "ota data partition invalid", you should run make erase_flash to erase the entire flash.