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I am trying to use an arduino uno to check to see if an esp8266-015 wifi module is working using AT commands. Connections ESP8266 Arduino Rx-Rx Tx-Tx GND-GND EN-3.3v VDD-3.3

I selected arduino uno in my board manager and the correct port this code is just a setup and loop

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

But when I type AT into the serial monitor, nothing happens, All I see is the serial monitor spitting this. image

I have looked through several tutorials and I keep getting this error, it just keeps printing the gray question marks. This is my first time using an esp8266 wifi module.

Killerbee
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1 Answers1

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You need to start the serial monitor first in your code, otherwise it won't be readable. Putting:

Serial.begin(115200);

Within the setup loop should allow this to be readable, but you can also add extra processing as shown at this link: https://www.instructables.com/Get-Started-With-ESP8266-Using-AT-Commands-Via-Ard/

Tyler2P
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Breadcrumbbz
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