MicroPython MMA8452Q Library

mma8452q

MicroPython Driver for the NXP MMA8452Q Accelerometer

• Author(s): Jose D. Montoya

class micropython_mma8452q.mma8452q.MMA8452Q(i2c, address: int = 0x1C)

Driver for the MMA8452Q Sensor connected over I2C.

Parameters:

• i2c (I2C) – The I2C bus the MMA8452Q is connected to.

• address (int) – The I2C device address. Defaults to 0x1D

Raises:

RuntimeError – if the sensor is not found

Quickstart: Importing and using the device

Here is an example of using the MMA8452Q class. First you will need to import the libraries to use the sensor

from machine import Pin, I2C
from micropython_mma8452q import mma8452q

Once this is done you can define your machine.I2C object and define your sensor object

i2c = I2C(1, sda=Pin(2), scl=Pin(3))
mma8452q = mma8452q.MMA8452Q(i2c)

Now you have access to the attributes

magx, magy, magz = mma8452q.acceleration

property acceleration: Tuple[float, float, float]

Acceleration measured by the sensor in \(m/s^2\).

property data_rate: str

Sensor data_rate

Mode	Value
mma8451.DATARATE_800HZ	0b000
mma8451.DATARATE_400HZ	0b001
mma8451.DATARATE_200HZ	0b010
mma8451.DATARATE_100HZ	0b011
mma8451.DATARATE_50HZ	0b100
mma8451.DATARATE_12_5HZ	0b101
mma8451.DATARATE_6_25HZ	0b110
mma8451.DATARATE_1_56HZ	0b111

property high_pass_filter: str

Sensor high_pass_filter

Mode	Value
mma8451.HPF_DISABLED	0b0
mma8451.HPF_ENABLED	0b1

property high_pass_filter_cutoff: str

Sensor high_pass_filter_cutoff sets the high-pass filter cutoff frequency for removal of the offset and slower changing acceleration data. In order to filter the acceleration data high_pass_filter must be enabled.

Mode	Value
mma8451.CUTOFF_16HZ	0b00
mma8451.CUTOFF_8HZ	0b01
mma8451.CUTOFF_4HZ	0b10
mma8451.CUTOFF_2HZ	0b11

property operation_mode: str

Sensor operation_mode

Mode	Value
mma8451.STANDBY_MODE	0b0
mma8451.ACTIVE_MODE	0b1

property scale_range: str

Sensor scale_range

Mode	Value
mma8451.RANGE_2G	0b00
mma8451.RANGE_4G	0b01
mma8451.RANGE_8G	0b10