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Drivers Manual

AOSI EZ-COMPASS-3 (Heading) - 05


Driver for ADVANCED ORIENTATION SYSTEMS INC. EZ-Compass-3 solid state MRU/Compass.
Driver can decode the proprietary $P message from the unit.
Driver to be used to decode roll-pitch (no heave) observations and/or heading.
Note that the same driver executable is used as for Octans MRU.

The EZ-Compass-3 also outputs temperature and detected magnetic field values but these are not decoded.

The system should be set up to output the proprietary $R message.

Driver Information

Driver AOSI EZ-COMPASS-3 (Heading)  Interface Type Serial  Driver Class Type Terminated 
UTC Driver (question) No Input / Output Input  Executable DrvPhotoneticsOctans.exe 
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Decoding Notes

By default the driver will check if the checksum of the received message is correct, if checksum fails then nothing is decoded.
This can be overruled by setting the "NOCS" option (see tab Additional Info).

Only Pitch/Poll/Heading is decoded, Magnetic fields and temperature fields are not decoded.

Database Setup

To decode also the pitch, roll and heave, add a "System" of type "Pitch, Roll and Heave Sensor", select the driver, and define the driver parameters.
To decode all four observations (pitch, roll, heave and heading), add both these system types to the Qinsy database and make sure to select the same gyro driver as for the MRU driver (regarding the heave convention) and the same I/O parameters for both systems.

Drivers IO Notes

Command line parameter  "NOCS" instructs the driver to ignore the checksum of the arrived string and to decode the fields even though the checksum is invalid.