Released Firmware

It is recommended to use the lastest version of firmware. Currently, Espressif releases AT firmware for the following ESP32-C2 series of modules.

Note

The released AT firmware only supports chip versions with a crystal oscillator frequency of 26 MHz. If your module uses a crystal oscillator frequency of 40 MHz, you can compile the ESP-AT project by following the steps in Compile ESP-AT Project Locally documentation. In the project configuration during the fifth step, make the following selections:
- Component config -> Hardware Settings -> Main XTAL Config -> Main XTAL frequency -> 40 MHz

If there is no released firmware for your module, you can either use the firmware for the module that has the same hardware configuration as yours (see ESP-AT Firmware Differences for which module has the same configuration), or if you need to modify the following configurations, you can generate a new firmware for your module by modifying the released firmware using the at.py Tool.

ESP32-C2 2MB Series