MetaWear modules

• Module interface
• Accelerometer module
• Gyroscope module
• Magnetometer module
• Barometer module
• LED module
• Ambient light module
• Settings module
• Haptic module
• Switch module
• Temperature module
• Sensor Fusion module

There are two major modalities for obtaining data from sensors: subscribing to data from it or logging the data to the MetaWear board for subsequent download.

Streaming data

Streaming the data is a method of data extraction that is preferable if you have a need of the data in real-time, e.g. for IMU navigation. It sends a epoch time tagged dictionary to a callback function specified by you, to process as you see fit.

Streaming is also the only option that allows for access to high frequency (>400 Hz) data for accelerometer and gyroscope.

Modules supporting continuous data streaming:

• accelerometer
• gyroscope
• magnetometer
• barometer
• switch
• ambientlight
• sensor_fusion

Modules supporting notification protocol, but notifications are received by manually triggering them:

• temperature
• settings (battery)

Logging data

If you are not dependent on having data delivered continuously but rather just need it saved for analysis later on, then logging it to the board is a better choice. It reduces the potential for BLE disconnections during data recording, making it a more stable means of ensuring that data is actually collected.

Modules supporting logging data (at least with PyMetaWear implementation):

• accelerometer
• gyroscope
• magnetometer
• sensor_fusion