Hello, I have a problem that has been plaguing me for quite a time, and which also seems insoluble.
What I do is that I wire up an ESP8266 WiFi module to the Arduino Uno board using the RX and TX pins on the board (NOT SoftwareSerial). I will then upload a simple or even an empty sketch to the board, then open Serial Monitor in Arduino IDE and type in AT commands to make contact with the ESP module. However, when uploading, the progress bar that indicate the upload progress stops at the end of it, remains like that for 2 - 3 minutes, then returns an error message saying that the board was not responding
What is causing this issue? Is it something wrong with the board, the driver or the ESP module? I need a solution to this RIGHT NOW!
The RX and TX pins of your Uno are used for uploading sketches to the Uno. If you connect anything to those pins it can interfere with uploads, as you discovered. So there is nothing wrong with the board, the driver, or the ESP module. What's wrong is your circuit.
eirikh1996:
I need a solution to this RIGHT NOW!
That sounds pretty rude. Behavior like that will only make it less likely for you to get help here.
This is problem with impedance load on Arduino's serial port. Generally, only one device can be connected to serial port in time.
The "RIGHT NOW" solution is to disconnect the ESP while uploading a new sketch.