GY-63 MS5611 barometric pressure with ESP32

Supply 3.3-5 V Bus I2C I2C address 0x77 / 0x76 Measures pressure, temperature

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
CSB	Not wired to the ESP32	—	Address select: LOW = 0x77, HIGH = 0x76
SDO	Not wired to the ESP32	—	SPI only. Leave unconnected for I2C

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(0x77);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "GY-63 MS5611 barometric pressure found at 0x77" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Sources

TE MS5611-01BA03 datasheet, I2C address 111011Cx, C = inverted CSB: CSB LOW = 0x77, CSB HIGH = 0x76
TE MS5611-01BA03 datasheet, Command-based interface (no ID register); PROM CRC checks the data

Try it in 3D in BoardPilot

BoardPilot Part data (JSON)

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

GY-63 MS5611 barometric pressure with ESP32

Pins and ESP32 wiring

Starter code (Arduino)

Sources

Try it in 3D in BoardPilot

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