hi , i am trying to check the serial1 pins tx, rx are working fine or not bcoz i was having problem while serial communicating with a meter so i decided to check if their any problem with arduino so i found this output comes after 10 times correct it starts showing only h again and again. i am using…

arduino mega 2560 not working properly

johnwasser September 30, 2017, 3:27pm 2

What is Serial3 connected to?!?

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