Hello, It seems ports clash between SoftwareSerial and PinChaneInt libraries that I met. Following the reference on https://code.google.com/p/arduino-pinchangeint/issues/detail?id=7 , I delete some ISR information in each .cpp file and just remain PCINT2 for SoftwareSerial (for GPS) and #if define…

Pin or Port Clash (PCINT clash between GPS and eHealth pulse sensor)?

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