make tilt angle independent of the board orientation (#531)

universam1 · Oct 1, 2021 · 39f0751 · 39f0751
1 parent 73e406e
commit 39f0751
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pio/src/iSpindel.cpp b/pio/src/iSpindel.cpp
@@ -957,7 +957,7 @@ float calculateTilt()
   if (ax == 0 && ay == 0 && az == 0)
     return 0.f;
 
-  return acos(az / (sqrt(ax * ax + ay * ay + az * az))) * 180.0 / M_PI;
+  return acos(abs(az) / (sqrt(ax * ax + ay * ay + az * az))) * 180.0 / M_PI;
 }
 
 bool testAccel()