Zeroing the sensors

[JLJu]

A dedicated message should be added to the communication protocol to handle sensors zeroing and calibration data. That function should work at a raw sensor data level. Let be M the raw sensor reading; the new message should produce a new sensor output Y=a +bM. So the function will be able to change the zero and the span of the sensor measurements. To change the sensor span the user needs a reference instrument. New function should provide advanced users the possibility to incorporate calibration data/functions/tables(lookup table + interpolation). I will post in brief a possible message format.

[JLJu]

I will implement a new message (maybe more) that will allow four main functions.

• Trigger a zeroing procedure from attached devices
• Receive calibration data from attached devices and use it on the sensor measurements
• Transmission of current calibration data to the attached devices
• Storage and retrieval of calibration parameters from SD Card, for file transfers we will use the implemented SD dump.

$CCS, SENSOR NUMBER, COMMAND (EXECUTE LOCAL CALIBRATION/USE CALIBRATION DATA FROM THE MESSAGE/SEND OUT CALIBRATION SETUP, MODE (OFFSET/LINEAR), PARAM1, PARAM2