RFM95W LoRa breakout (SX1276, 868/915 MHz) with ESP32

Supply 3.3-5 V Bus SPI

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VIN	Power	3V3	On-board regulator: 3.3 to 6 V
GND	Ground	GND
EN	Not wired to the ESP32	—	Regulator enable, pulled up. Leave unconnected
G0	Interrupt	D35	DIO0: TX done / RX done interrupt
SCK	SPI clock	D18
MISO	SPI MISO	D19
MOSI	SPI MOSI	D23
CS	SPI chip select	D5	SPI chip select (NSS)
RST	Input (the ESP32 drives it)	D25	Reset, active LOW
G1	Interrupt	VP	DIO1, optional
G2	Not wired to the ESP32	—	DIO2, usually unused
G3	Not wired to the ESP32	—
G4	Not wired to the ESP32	—
G5	Not wired to the ESP32	—
ANT	Not wired to the ESP32	—	Antenna pad. Always connect an antenna before transmitting

Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.

void setup() { pinMode(25, OUTPUT); }  // RST

void loop() {
  digitalWrite(25, HIGH);
  delay(500);
  digitalWrite(25, LOW);
  delay(500);
}

Semtech SX1276/77/78/79 datasheet, SPI interface; DIO0 to DIO5 mapping; supply 1.8 to 3.7 V
Adafruit RFM69HCW and RFM9X LoRa Packet Radio Breakouts guide, Pinouts (VIN, GND, EN, G0 to G5, SCK, MISO, MOSI, CS, RST)

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.