What firmware is in my ESP-12F?

[davidhigton]

I bought an ESP-12F some years ago. I remember typing lots of AT commands to it. I stopped using it, but picked it up again yesterday because I'd like to use it in a new project. I've got it hooked up to 3.3V and a serial terminal. It signs on like this:

Ai-Thinker Technology Co. Ltd.

ready

but everything that I've typed to it just gets the response "ERROR". Even just a <CR>, or AT.

It might sound like a silly question, but can anyone think what firmware I might have in there?

Is the "ready" a clue?

I don't remember reflashing it, but it's years ago, my memory is bad and getting worse, and I've cluttered my brain up with loads more stuff since then.

[Her Mary]

Maybe you can download a new version AT to have a try. https://github.com/espressif/esp-at/rel ... c1_esp8266