The IR sensor was from time to time blinded by sun...

I simply replaced it by a hall effect switch.

I choosed a 3.3V chip with the reference SS49E

To connect it to the PCB and replace the IR sensor, follow these guidelines

• short R3 with a copper wire
• unsolder R4
• connect the sensor as follows

Then replace the 3D printed "wheel" by the magnet holder. You will need to glue a "diametrical magnet 6mm diameter, 2mm width"

Note that the 4mm nut is hidden into the printed part (add a filament change on top of the nut)

When finished the hall sensor should fly 2 to 3mm above the magnet

The code of the project remains strictly the same and is still available on my github page