emontx shield

i have built up my second shield however the LED is not turn on once it is connected to the arduino board before the first shield was working fine, is the problem caused by soldering the RFM12B?


donturner's picture

Re: emontx shield

The LED is connected to digital pin 9, so you can at least verify that the LED is working with the following script: 

const int LEDpin = 9;

void setup(){
  pinMode(LEDpin, OUTPUT);
  digitalWrite(LEDpin, HIGH);
void loop(){


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