Re: Nodemcu communication doesn't work no more (AT commads)
Posted: Wed Dec 20, 2017 2:45 amI did the same thing last night. Uploaded the blink sketch and lost AT Commands. after 4hrs of trying to get them back It finally worked. Set the ESP8266 to flash mode by wiring GPIO0 to ground and followed the steps on this page....
https://www.allaboutcircuits.com/projects/flashing-the-ESP-01-firmware-to-SDK-v2.0.0-is-easier-now/
Incase you have issues I should say I did not follow the page from the start. I made several other attempts. And after some initial progress ended up flashing the ESP with the instructions on the page above. My exact steps were as follows.
1. Download Nodemcu-flasher from https://github.com/nodemcu/nodemcu-flasher
2. Place ESP in flash mode by wiring GPIO0 to ground. (it would not work at first when I tried to use a pull down button I had in place on my breadboard)
3. Set the Nodemcu-flasher settings to the one attached in the picture (Note that my board is and ESP-01. your setting may be different)
4. Nodemcu-flasher worked to remove the blink sketch, but was stuck in a restart loop.
5. repeated Step 2 again.
6. Now flashed the ESP-01 using the files and setting from the above webpage (same as the attached picture)
ESP8266 ESP-01 acting like new again. AT+ Commands working and able to connect to my local wifi.
.
Hope this helps if you're still having trouble.
https://www.allaboutcircuits.com/projects/flashing-the-ESP-01-firmware-to-SDK-v2.0.0-is-easier-now/
Incase you have issues I should say I did not follow the page from the start. I made several other attempts. And after some initial progress ended up flashing the ESP with the instructions on the page above. My exact steps were as follows.
1. Download Nodemcu-flasher from https://github.com/nodemcu/nodemcu-flasher
2. Place ESP in flash mode by wiring GPIO0 to ground. (it would not work at first when I tried to use a pull down button I had in place on my breadboard)
3. Set the Nodemcu-flasher settings to the one attached in the picture (Note that my board is and ESP-01. your setting may be different)
4. Nodemcu-flasher worked to remove the blink sketch, but was stuck in a restart loop.
5. repeated Step 2 again.
6. Now flashed the ESP-01 using the files and setting from the above webpage (same as the attached picture)
ESP8266 ESP-01 acting like new again. AT+ Commands working and able to connect to my local wifi.
.Hope this helps if you're still having trouble.