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A microcontroller board based on the ATmega2560 or 1280 chip. Use this tag for questions specifically regarding the Mega, and not just general Arduino usage.

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Turning LED On/Off by using SIM808 with Arduino Mega

I am trying to turn an LED on/off by using GSM 808 module. Here #a0 = LED off and #a1 = LED on. I have used lcdShow function to display characters in LCD display. But nothing appears on display. What …