so i accidently connected my esp32 gpio13 to GND and then on it refuse to upload any code
i vas driving a servo with it ,
it says "Serial port COM7:
Connecting.....................................
A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: Troubleshooting - ESP32 - — esptool latest documentation
.
the selected serial port .
does not exist or your board is not connected"
so about esp32 it is getting power , no heat, proper power on power pins ,tried pressing the EN button ,and IO0 pin but nothing worked .is my ESP32 fried?
How was the servo powered?
take the ESP32 out of the circuit and try to upload the code
if it works on the bare ESP32 board, add one peripheral at a time to figure out what causes the issue
It was powered from an external 5v
Yea i removed all of the connection just only the esp32
Which esp32 board are you using?
Was GPIO13 being used in your code?
It is ESP32 WROOM 32E nodemcu.Yes i was using it to drive a servo
If it was a momentary short to ground, like if you dropped a jumper wire and it touched ground, then it might not be damaged but if you had it conneced directly to ground then you probably damaged at least that pin or several pins or even the entire ESP
Ooh, I think i accidently connected the gpio 13 to gnd when i was soldering to it as the gnd pin was just beside it. So any hope?
So should i leave it
Most NodeMCU boards use a ESP8266 module, ones that have an ESP32 all say ESP32S, so I'm not sure what you have.
Can you show a picture?
I assume you are using windows and if the board does not show up in the device manager, then it probably is kaput.
Yes the board does show up but when i try to upload it shows "Connecting.....................................
A fatal error occurred: Failed to connect to ESP32: No serial data received". This error
Does it show up under Ports (COM LPT) ?
Something like Silicon labs CP2102 COM7 ?
Are you selecting the same port number in the IDE?
If you have the wrong port selected you will get that error.
Wait, I think your board uses the CH340 UART so you should see in device manager CH340 (COM7) or some other COM number.
Yes i cheked the device manager,i selected the port that showed up on connecting the esp
I assume that you have removed the connection to ground. Any possibility that you have shorted GPIO13 to the adjacent GPIO9? That would interfere with the onboard flash memory. Can you post a clear picture of your board showing where you were soldering?
Other than checking for more shorts as @david_2018 mentioned, I don't think there is any more debugging you can do. So seems like it is dead.
