nRF24L01 socket adapter (5 V to 3.3 V) with ESP32

Supply 5 V Bus SPI

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	VIN	5 V in: the on-board AMS1117 makes 3.3 V for the radio
GND	Ground	GND
CE	Input (the ESP32 drives it)	D25	Chip enable
CSN	SPI chip select	D5	SPI chip select
SCK	SPI clock	D18
MO	SPI MOSI	D23	MOSI
MI	SPI MISO	D19	MISO
IRQ	Interrupt	D35	Interrupt, optional

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

This module is sold for 5 V. Its outputs may be 5 V: use a level shifter or a voltage divider on ESP32 inputs.

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

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

Advanced Monolithic Systems AMS1117 datasheet, 3.3 V fixed output, 1 A
Nordic nRF24L01+ product specification, Digital inputs are 5 V tolerant; supply 1.9 to 3.6 V

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