Datasheet

Remove the while (!Serial); line if you are not tethering to a computer, as it will cause the Arduino to halt until a USB

connection is made!

Initializing Radio

The library gets initialized with a call to init(). Once initialized, you can set the frequency. You can also configure the

output power level, the number ranges from 5 to 23. Start with the highest power level (23) and then scale down as

necessary

Transmission Code

If you are using the transmitter, this code will wait 1 second, then transmit a packet with "Hello World #" and an

incrementing packet number

void setup()

{

pinMode(LED, OUTPUT);

pinMode(RFM95_RST, OUTPUT);

digitalWrite(RFM95_RST, HIGH);

while (!Serial); // wait until serial console is open, remove if not tethered to computer

Serial.begin(9600);

delay(100);

Serial.println("Arduino LoRa RX Test!");

// manual reset

digitalWrite(RFM95_RST, LOW);

delay(10);

digitalWrite(RFM95_RST, HIGH);

delay(10);

while (!rf95.init()) {

Serial.println("LoRa radio init failed");

while (1);

}

Serial.println("LoRa radio init OK!");

// Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM

if (!rf95.setFrequency(RF95_FREQ)) {

Serial.println("setFrequency failed");

while (1);

}

Serial.print("Set Freq to: "); Serial.println(RF95_FREQ);

// Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on

// The default transmitter power is 13dBm, using PA_BOOST.

// If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then

// you can set transmitter powers from 5 to 23 dBm:

rf95.setTxPower(23, false);

https://learn.adafruit.com/adafruit-rfm69hcw-and-rfm96-rfm95-rfm98-lora-packet-padio-

breakouts

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