I have tried: while(!(Serial.available())){} but the code seems to be rolling right over that. There shouldn't be anything in the serial buffer at that point in the code. On a sort of related note: Serial.read(); should empty a byte from the buffer shouldn't it?

Waiting for a byte to received in the Serial buffer before moving on

Funky_Gibbon August 6, 2012, 7:00pm 9

my program sends 2 bytes, 1st is pin number, the 2nd byte is state, a 3rd could be sent with a checksum which the RX will then send back to TX to confirm

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Waiting for a byte to received in the Serial buffer before moving on

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