Sensors data

Data from sensors are sent in the following TLV structure:

type	length [B]	value
0x0005	up to 23	active_sensors (1B), sensors_data (up to 22B)

This structure has different lengths. The length of it depends on activated sensors that want to send their data. Information about which sensors are active is encoded in the first byte of the structure.

The active sensors byte is encoded in the following way.

bit	sensor	Description
7	pushbutton	It is set to 1 in one blink after the pushbutton was pressed. No added payload.
6	reserved
5	reserved
4	reserved
3	barometer	It is set to 1 if the barometer is active. If active the 4 bytes of sensors data are added to the payload. Order of data: raw_temperature (1B), raw_pressure (3B)*
2	magnetometer	It is set to 1 if the magnetometer is active. If active the 6 bytes of sensors data are added to the payload. Order of the data: x_axis (2B), y_axis (2B), z_axis (2B)*
1	gyroscope	It is set to 1 if the gyroscope is active. If active the 6 bytes of sensors data are added to the payload. Order of the data: x_axis (2B), y_axis (2B), z_axis (2B)*
0	accelerometer	It is set to 1 if the accelerometer is active. If active the 6 bytes of sensors data are added to the payload. Order of the data: x_axis (2B), y_axis (2B), z_axis (2B)*

*all multibyte values are in little-endian order

If more than one sensors are active, the sensors data are ordered in the following order → Barometer (temperature, pressure), Magnetometer, Gyroscope, Accelerometer.

All sensors data are sent in the raw form - the following formulas must be used to get in base units:

Temperature

Atmospheric pressure

Acceleration

The formula depends on the configurable parameter - dynamic range of the accelerometer which can be found in the infoMsg.

Gyroscope

The formula depends on the configurable parameter - dynamic range of the gyroscope which can be found in the infoMsg.