Datasheet

If you are using a board with 'native USB' make sure the while (!Serial) line is commented out if you are not tethering to
a computer, as it will cause the microcontroller to halt until a USB connection is made!
Initializing Radio
Once initialized, you can set up the frequency, transmission power, radio type and encryption key.
For the frequency, we set it already at the top of the sketch
For transmission power you can select from 14 to 20 dBi. Lower numbers use less power, but have less range. The
second argument to the function is whether it is an HCW type radio, with extra amplifier. This should always be set to
true!
Finally, if you are encrypting data transmission, set up the encryption key
void setup()
{
Serial.begin(115200);
//while (!Serial) { delay(1); } // wait until serial console is open, remove if not tethered to computer
pinMode(LED, OUTPUT);
pinMode(RFM69_RST, OUTPUT);
digitalWrite(RFM69_RST, LOW);
Serial.println("Feather RFM69 RX Test!");
Serial.println();
// manual reset
digitalWrite(RFM69_RST, HIGH);
delay(10);
digitalWrite(RFM69_RST, LOW);
delay(10);
if (!rf69.init()) {
Serial.println("RFM69 radio init failed");
while (1);
}
Serial.println("RFM69 radio init OK!");
// Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM (for low power module)
// No encryption
if (!rf69.setFrequency(RF69_FREQ)) {
Serial.println("setFrequency failed");
}
// If you are using a high power RF69 eg RFM69HW, you *must* set a Tx power with the
// ishighpowermodule flag set like this:
rf69.setTxPower(20, true); // range from 14-20 for power, 2nd arg must be true for 69HCW
// The encryption key has to be the same as the one in the server
uint8_t key[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
rf69.setEncryptionKey(key);
© Adafruit Industries
https://learn.adafruit.com/adafruit-rfm69hcw-and-rfm96-rfm95-rfm98-lora-packet-padio-
breakouts
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