GeoLink Configuration
Contents
1 GeoLink Support
GeoLink is supported from firmware version 2.5. In order to utilize all the functions it is necessary to enable the support in the Spirit Settings - General tab.
2 Compass Calibration
All GeoLink modules were fully tested and calibrated. The only thing pilot might need is to re-calibrate Compass. Compass is crucial for determining heading of the model for a proper navigation through space. Compass is sensing Earth's magnetic field (Geomagnetic field) and in this way it can determine heading at any time. Unfortunately Geomagnetic field is different everywhere. Thus if you live outside Czech Republic country where module was calibrated initially, it is recommended to perform new calibration. [TODO: need to perform testing with a pilots]
2.1 How to check
To verify that GeoLink is calibrated correctly for your area, please launch the Spirit Settings and open GeoLink settings window. At Info tab you can see current Heading value.
Please place the model or just GeoLink to the North as close as you can, so that flight direction of the model is front of the arrow. ideally compare to an analogue compass.
When heading to North, you should see approximately 90° +/- 4°. Measured value should not be far from this.
2.2 Odd behavior
If Compass calibration is wrong you will notice that features such as Geo-fence, Return to Home, Position Hold are not working precisely. For example when Return to Home is engaged and model reached its Home position, the model could move in a circle manner around that spot. The bigger is circle, the bigger is Compass heading error. If you can observe this behavior always, then it is clear sign that you need to re-calibrate the Compass.
2.3 Calibration process
In order to perform the calibration it is necessary to enter the Spirit Settings/Module and click the Calibration request button. After confirmation you will have to disconnect power from the module. When powering the model with GeoLink again you will immediately notice 3 series of rapid flashing. Wait until the LED flashing will pass while not moving with GeoLink at all.
Immediately then the Status LED will be indicating progress of the calibration.
Start moving with the model in all possible directions at all angles that long, until you will not see any fast LED flashing. Any LED flash indicate that a new calibration data were acquired.
If done, put the model at the bench and wait for 5 seconds. After this period you will see whethet the calibration was successfull or you will have to continue.
Successfull calibration is indicated by 6 longer LED flashes. Then the LED will turn off you are calibration is done.
If you will notice periodic LED flashing instead, you have missed some inclination. Move with the module again and try to find the missing point. Then place the GeoLink for another 5 seconds to check the calibration condition.
Calibration will not finish until it is fully done. If power is turned off while calibration is not finished, the calibration process will start from the beginning on next power up.
