Getting extreme readings about sparkfun_mag3110_breakout_board_arduino_library

[ejosh]

After digging slightly more into the solution for your issue submitted on this other repo, this should definitely use the signed int16_t, the sensor datasheet at one point refers to returning values from -30,000 to +30,000 for each axis. (Section 5.1.2, p.17)

[sanyi]

Here we can only cast x = (int) values[0]; if we are sure int has the same bite size as (in our specific case) 16. Obviously this is not the case so the sign bit is misinterpreted as 2^15. However being explicit x = (int16_t) values[0]; does the trick.

[DiscoMan18]

This library perfectly works on ESP32 devices. I checked it. Just change int to int16_t everywhere in the code.