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nodemcu sent random values via serial communication
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nodemcu sent random values via serial communication

by Mohamed123 on Thu Aug 13, 2020 11:44 am

I have a small project on Adafruit which I use a keypad to set and change a variable that sends to the Nodemcu board and then sent to a sketch on the Arduino Mega board. The problem is when I didn't send any value via keypad there are random values sent to my Nodemcu board which make a big disturbance to my sketch procedure and its process. These random values being for while and then set to 255 automatically and after less than two minutes it changes randomly again.

Mohamed123
 
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Re: nodemcu sent random values via serial communication

by adafruit_support_mike on Sat Aug 22, 2020 12:22 am

One possible option is line noise. It could be caused by a marginal connection somewhere in the signal path, or by electrical noise generated somewhere in the operating environment.

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Please be positive and constructive with your questions and comments.