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 you are unsure which AT firmware your module should use, please read the ESP-AT Firmware Differences document first. This document compares the differences among different ESP32-C2 AT firmwares in terms of supported command sets, hardware configurations, and module compatibility, helping you determine if there is a suitable firmware for your module’s hardware configuration.

If you need to modify the following configurations, you can generate a new firmware by modifying the AT firmware using the at.py Tool.

Disclaimer

Before using the AT firmware below, please read the Disclaimer carefully and comply with its terms and precautions.

The firmware below is only applicable to the ESP32-C2 ECO4 (Rev v2.0) series chips.

The firmware below is only applicable to the ESP32-C2 ECO4 (Rev v2.0) series chips.

The firmwares below are applicable to the ESP32-C2 ECO1 (Rev v1.0) and ECO2 (Rev v1.1) series chips.

The firmwares below are applicable to the ESP32-C2 ECO1 (Rev v1.0) and ECO2 (Rev v1.1) series chips.