ESP8266 Community Forum

- Tue May 30, 2017 12:02 pm #66520 Hi!
I've got a problem with my ESP 01. This is the first time I'm using ESP module...

At first time I powered up ESP everything was ok, there was a wifi signal. There was only a problem with AT commands, because not always I was able to connect with ESP. The power circuit was ok, GPIO0 to the GND etc.

Then when I fixed this I tried to upload an arduino program for comm LED blinking. The program was uploaded correctly but didn't work. Then everything crashed.

There was no wifi signal (new program uploaded is a reason, I think), I wasn't able to use AT commands. The only thing I was able to do was uploading new programs. So I tried to upload the WiFi AP program. Program was uploaded correctly and nothing happend. Then I tried a program which sends a serial message every second. Still the same.

I tried to upload frimware again (I used NODEMCU), AT commands didn't work, I erased whole chip with blank.bin, and then uploaded firmware, still the same.

I don't know what to do, maybe someone could give some advise how to get out from here?

- Tue May 30, 2017 2:41 pm #66531 When uploading Arduino sketch, or any other firmware, the original AT firmware is gone/erased ...

- Tue May 30, 2017 4:02 pm #66537

When uploading Arduino sketch, or any other firmware, the original AT firmware is gone/erased ...

Ok I know that, it's normal... But when I try to upload firmware again, the upload is complete with succes, but esp doesn't work as it should.

- Tue May 30, 2017 4:07 pm #66540 If you want the AT command firmware back, read https://www.allaboutcircuits.com/projects/flashing-the-ESP-01-firmware-to-SDK-v2.0.0-is-easier-now/