sparkfun RFM69HCW Hook-Up Manual page 17

if (radio.sendWithRetry(TONODEID, sendbuffer, sendleng
th))
Serial.println("ACK received!");
else
Serial.println("no ACK received");
}
// If you don't need acknowledgements, just use send():
else // don't use ACK
{
radio.send(TONODEID, sendbuffer, sendlength);
}
sendlength = 0; // reset the packet
Blink(LED,10);
}
}
// RECEIVING
// In this section, we'll check with the RFM69HCW to see
// if it has received any packets:
if (radio.receiveDone()) // Got one!
{
// Print out the information:
Serial.print("received from node ");
Serial.print(radio.SENDERID, DEC);
Serial.print(", message [");
// The actual message is contained in the DATA array,
// and is DATALEN bytes in size:
for (byte i = 0; i < radio.DATALEN; i++)
Serial.print((char)radio.DATA[i]);
// RSSI is the "Receive Signal Strength Indicator",
// smaller numbers mean higher power.
Serial.print("], RSSI ");
Serial.println(radio.RSSI);
// Send an ACK if requested.
// (You don't need this code if you're not using ACKs.)
if (radio.ACKRequested())
{
radio.sendACK();
Serial.println("ACK sent");
}
Blink(LED,10);
}
}
void Blink(byte PIN, int DELAY_MS)
// Blink an LED for a given number of ms
{
digitalWrite(PIN,HIGH);
delay(DELAY_MS);
digitalWrite(PIN,LOW);
}
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