MCP4725 12-bit DAC breakout with ESP32

Supply 3.3-5 V Bus I2C I2C address 0x60 / 0x61 / 0x62 / 0x63 / 0x64 / 0x65 / 0x66 / 0x67

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	3V3
GND	Ground	GND
SCL	I2C clock (SCL)	D22
SDA	I2C data (SDA)	D21
A0	Not wired to the ESP32	—	Address bit. Most boards answer at 0x60 or 0x62
OUT	Not wired to the ESP32	—	Output 0 V to VCC. To check it, wire it to an ADC1 pin

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

Starter code (Arduino)

#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);  // SDA = GPIO 21, SCL = GPIO 22
  Wire.beginTransmission(0x60);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "MCP4725 12-bit DAC breakout found at 0x60" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Sources

Microchip MCP4725 datasheet, Address 1100 A2 A1 A0: A2 A1 set at the factory, A0 by pin (0x60 to 0x67); supply 2.7 to 5.5 V
Adafruit MCP4725 breakout guide, Pinouts. Board order differs between sellers: check the silkscreen

Try it in 3D in BoardPilot

BoardPilot Part data (JSON)

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

MCP4725 12-bit DAC breakout with ESP32

Pins and ESP32 wiring

Starter code (Arduino)

Sources

Try it in 3D in BoardPilot

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