AS5048A magnetic angle encoder (SPI) with ESP32

Supply 3.3 V Bus SPI Measures angle, rotation

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
3V3	Power	3V3	Use this pin with the ESP32. Pin order differs between adapter boards
5V	Not wired to the ESP32	—	Only for 5 V systems. Leave unconnected when you use 3V3
GND	Ground	GND
CSN	SPI chip select	D5
CLK	SPI clock	D18
MOSI	SPI MOSI	D23
MISO	SPI MISO	D19
PWM	Output (the part drives it)	D25	Angle as PWM duty cycle. Optional

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() {
  Serial.begin(115200);
  pinMode(25, INPUT);  // PWM
}

void loop() {
  Serial.println(digitalRead(25));
  delay(100);
}

ams AS5048A/AS5048B datasheet, SPI interface (mode 1), 14-bit angle register 0x3FFF
ams AS5048A/AS5048B datasheet, 3.3 V or 5 V supply modes

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