ADXL345

Connects over

I²C

Address

0x53 (or 0x1D)

Made by

Analog Devices

Datasheet

analog.com

Use it

hardware {
    device adxl345: ADXL345
}

every 1s {
    let value: float = adxl345.x()
    log("adxl345", "x={value}")
}

On its own, the declaration puts the ADXL345 on the first I²C bus (SDA 21, SCL 22 on the ESP32) at 0x53. To choose the pins or the address, declare the bus and attach the device: device adxl345: ADXL345 on i2c0 at 0x1D with i2c i2c0(sda: 21, scl: 22).

Methods

• adxl345.x() -> float

  X acceleration in g

• adxl345.y() -> float

  Y acceleration in g

• adxl345.z() -> float

  Z acceleration in g

• adxl345.magnitude() -> float

  Vector magnitude in g (1.0 at rest)

Wiring

Specifications

Voltage

3.3V (GY-85 has an onboard regulator, 3.3-5V ok)

Range

±2g (full resolution, 3.9 mg/LSB)

Sample rate

100 Hz

Tips

• On the GY-85 this shares the bus with ITG3205 (0x68) and HMC5883L (0x1E) — declare all three on the same bus.
• Address 0x1D if SDO is pulled high (bare chip); GY-85 fixes it at 0x53.

Alternatives worth knowing:

• MPU6050: Accel + gyro in one chip.