Recently, I try to use an external compass (GY-271 and GY-273)
I found the GY-271 or GY-273 use hmc5883L.
So I tried to use it like that.
hmc5883 -C -T -X start
and the result is like that.
How can I use an external mag? Is it possible to use GY-271 or GY-273?