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.

Currently, ESP32-C2 AT released firmware does not support most of Bluetooth® Low Energy AT Commands (excluding BluFi commands). If you only need to use Basic AT Commands and Bluetooth® Low Energy AT Commands on ESP32-C2, follow the steps described in How_to_download_the_latest_temporary_version_of_AT_from_github to directly download the esp32c2-ble-2mb-at firmware, or compile this firmware by yourself following the steps in the How_to_clone_project_and_compile_it (Note: When setting up the environment in step three of the document, choose ESP32C2-BLE-2MB).
- This firmware currently does not support OTA function.
- AT firmware on GitHub will automatically expire after 90 days, so please save the downloaded AT firmware.

ESP32-C2 2MB Series