You use the 32 Bit Version of Processing? The 64 Bit version doesn't support Serial communication.
Did you put in the correct COM port name?
My guess is that the com port is not correctly connected. Due to one of the reasons above.
You use the 32 Bit Version of Processing? The 64 Bit version doesn't support Serial communication.
Did you put in the correct COM port name?
My guess is that the com port is not correctly connected. Due to one of the reasons above.