we are planning to provide wifi/ble connectivity to our 8bit MCU through an ESP32 with the esp-at firmware and we are looking for a way to update both the 8bit firmware and the (customized) esp-at firmware itself.
Thinking about the second step, it seems that this should be possible using AT+CIUPDATE:
AT+CIUPDATE=[,] Function: set FOTA mode and upgrade to a specific version.
0：normal FOTA
1：SSL FOTA
If using Espressif's AT BIN (/esp-idf/bin/at), AT+CIUPDATE will download a new AT BIN from the Espressif Cloud.
If using a user-compiled AT BIN, users need to make their own AT+CIUPDATE upgrade.
Espressif provides a demo as a reference for local upgrade (/esp-idf/example/at).
but we didn't find any example... and a quick try ends up with a "rom_version error!"
Is there anybody else experiencing this error ? is there an example somewhere ?
thanks for any hints,
Giampaolo