Released Firmware

It is recommended to use the lastest version of firmware.

Espressif has not released a separate version for the 1 MB ESP8285/8266 series of chips, but you can refer to How to Download the Latest Temporary Version of AT Firmware from GitHub and choose to download the 1 MB firmware on the CI (Continuous Integration) of GitHub (Please switch to release/v2.2.0.0_esp8266 branch and download esp8285-1MB-at under the Artifacts page).

ESP-WROOM-02 Series