Do you use the original akku of the Denna mower the 24Vdc
You can use the Denna pack or ardumower one , with the PCB1.3 without other electronik.
In my case it's the Denna one rebuild with new SAMSUNG ICR18650-22F inside (not really easy to rebuild but OK since 3 Years).
On the PCB1.3 you have 2 input (left and right bumper) and they can use the Denna original contact .
For the Bumper Duino ,you need to check but i think it use the 2 inputs.
Be carrefull with the IMU, if you want to use my code with By Lane mowing a GY88 IMU is mandatory the GY87 or GY801 don't work.
Also the STEP for the screen in grabcad for the screen XPT2046 is not OK on the fixation (maybe old design).
By