Where is the official AT Firmware ?

[saif_iot]

Let's say we buy a new Espressif ESP32, and we download ESP-IDF SDK, and we flash the hello-world example.

- Is that mean we overwritten the official Espressif firmware?
- Is that mean our ESP32 no longer support AT command's because hello-world overwrite it ?
- Is possible to flash the hello-world example with keeping the official AT command's ?

- Where is the official code source of Espressif AT firmware?. this one seem just an "basic" example https://github.com/espressif/esp-at

Thank you,

[akarg96]

Google Translate.
Hi.
According to my research, at the time of purchase ESP32 has an interpreter for the SSC command written into it. This is the factory test firmware, so rewriting it should be fine.
If you want to use AT commands on the ESP32, you can write AT firmware to the "ESP32-WROOM-32 AT Bin V2.0". The writing method is the same as hello-world.
https://www.espressif.com/en/support/download/at
The third question is difficult to answer, but AT firmware can add its own AT commands.
For more information, please visit the AT Firmware Github and the following links
https://github.com/espressif/esp-at
https://blog.csdn.net/espressif/article ... /102777084.