@adrien_tobeca more recent firmware reports the raw angle:
M591 D0 Duet3D Roto magnetic filament monitor, enabled always, 25.20mm/rev, allow 10% to 190%, check printing moves every 2.0mm, agc 45, raw angle 354, no calibration dataAlso you can use the "S" parameter in M591 to monitor movement all the time if you prefer:
Sn 0 = disable filament monitoring (default), 1 = enable filament monitoring when printing from SD card, 2 = enable filament monitoring all the time (S2 is supported RRF 3.5.0 and later ). Filament monitors accumulate calibration data (where applicable) even when filament monitoring is disabled
https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m591-configure-filament-sensing