2018-06-21, 10:17 PM
It is probable the compass was not properly calibrated in my bench observation. Underway racing it's a bit harder for me to make a controlled observation, but the compass is often temporarily 5-10 degrees out of sync with the "real" compasses on the boat, (and the gps heading FWIW). Tied to the pier it is correct again. We had two, two hour or more sailing sessions since it was mounted so that one should be calibrated.
I have a BMP180 or a BME280 also on I2C (I have a portable openplotter for the race boat I crew on, and another setup a bit more fixed for my own boat.)
Thank you for your suggestions, I will remove the pressure sensor and check out those observations from terminal window this weekend.
I have a BMP180 or a BME280 also on I2C (I have a portable openplotter for the race boat I crew on, and another setup a bit more fixed for my own boat.)
Thank you for your suggestions, I will remove the pressure sensor and check out those observations from terminal window this weekend.