RFM95W LoRa

// RFM95W LoRa on Arduino Uno: wiring and a free simulation at https://www.tinkered.ai/components/rfm95w-lora
// Adafruit RFM95W breakout on an Arduino Uno: CS D10, RST D9, G0 D2, SPI D11/D12/D13
// Flash one board with isSender = true and another with isSender = false.
#include <SPI.h>
#include <LoRa.h>

const long FREQUENCY = 915E6; // 868E6 in Europe, 915E6 in the Americas
const bool isSender = true;
unsigned long counter = 0;

void setup() {
  Serial.begin(115200);
  LoRa.setPins(10, 9, 2); // CS, RST, G0
  if (!LoRa.begin(FREQUENCY)) {
    Serial.println(F("RFM95W not found: check wiring and power"));
    while (true) {}
  }
  LoRa.setTxPower(17);        // dBm, on the PA_BOOST output the RFM95W uses
  LoRa.setSpreadingFactor(9);
  LoRa.setSyncWord(0x34);
  Serial.println(isSender ? F("RFM95W sender ready") : F("RFM95W receiver ready"));
}

void loop() {
  if (isSender) {
    LoRa.beginPacket();
    LoRa.print("ping ");
    LoRa.print(counter);
    LoRa.endPacket();
    Serial.print(F("Sent ping "));
    Serial.println(counter++);
    delay(5000);
  } else {
    if (LoRa.parsePacket() > 0) {
      Serial.print(F("Received '"));
      while (LoRa.available()) Serial.print((char)LoRa.read());
      Serial.print(F("' RSSI "));
      Serial.print(LoRa.packetRssi());
      Serial.print(F(" dBm, SNR "));
      Serial.println(LoRa.packetSnr());
    }
  }
}

// RFM95W LoRa on ESP32 DevKit V1: wiring and a free simulation at https://www.tinkered.ai/components/rfm95w-lora
// Adafruit RFM95W breakout on an ESP32 DevKit V1: CS GPIO5, RST GPIO27, G0 GPIO26, VSPI 18/19/23
// Flash one board with isSender = true and another with isSender = false.
#include <SPI.h>
#include <LoRa.h>

const long FREQUENCY = 915E6; // 868E6 in Europe, 915E6 in the Americas
const bool isSender = true;
unsigned long counter = 0;

void setup() {
  Serial.begin(115200);
  LoRa.setPins(5, 27, 26); // CS, RST, G0
  if (!LoRa.begin(FREQUENCY)) {
    Serial.println("RFM95W not found: check wiring and power");
    while (true) { delay(100); }
  }
  LoRa.setTxPower(17);
  LoRa.setSpreadingFactor(9);
  LoRa.setSyncWord(0x34);
  Serial.println(isSender ? "RFM95W sender ready" : "RFM95W receiver ready");
}

void loop() {
  if (isSender) {
    LoRa.beginPacket();
    LoRa.print("ping ");
    LoRa.print(counter);
    LoRa.endPacket();
    Serial.printf("Sent ping %lu\n", counter++);
    delay(5000);
  } else if (LoRa.parsePacket() > 0) {
    String text;
    while (LoRa.available()) text += (char)LoRa.read();
    Serial.printf("Received '%s' RSSI %d dBm, SNR %.1f dB\n", text.c_str(), LoRa.packetRssi(), LoRa.packetSnr());
  }
}

// RFM95W LoRa on Raspberry Pi Pico: wiring and a free simulation at https://www.tinkered.ai/components/rfm95w-lora
// Adafruit RFM95W breakout on a Raspberry Pi Pico (arduino-pico): CS GP17, RST GP20, G0 GP21, SPI0 GP16/18/19
// Flash one board with isSender = true and another with isSender = false.
#include <SPI.h>
#include <LoRa.h>

const long FREQUENCY = 915E6; // 868E6 in Europe, 915E6 in the Americas
const bool isSender = true;
unsigned long counter = 0;

void setup() {
  Serial.begin(115200);
  SPI.setRX(16);
  SPI.setSCK(18);
  SPI.setTX(19);
  LoRa.setPins(17, 20, 21); // CS, RST, G0
  if (!LoRa.begin(FREQUENCY)) {
    Serial.println("RFM95W not found: check wiring and power");
    while (true) { delay(100); }
  }
  LoRa.setTxPower(17);
  LoRa.setSpreadingFactor(9);
  LoRa.setSyncWord(0x34);
  Serial.println(isSender ? "RFM95W sender ready" : "RFM95W receiver ready");
}

void loop() {
  if (isSender) {
    LoRa.beginPacket();
    LoRa.print("ping ");
    LoRa.print(counter);
    LoRa.endPacket();
    Serial.print("Sent ping ");
    Serial.println(counter++);
    delay(5000);
  } else if (LoRa.parsePacket() > 0) {
    Serial.print("Received '");
    while (LoRa.available()) Serial.print((char)LoRa.read());
    Serial.print("' RSSI ");
    Serial.print(LoRa.packetRssi());
    Serial.print(" dBm, SNR ");
    Serial.println(LoRa.packetSnr());
  }
}