I just finished my build of the Caterpillar bulldozer D11 (set 42131) and I'm NOT able to operate it with the Control+ app on my iPhone.
First the calibrate process begins:
Step 1 in that is to move the scoop up and down, but in stead the plough moves.
Step 2 is supposed to change the angle of the scoop, but nothing happens at all. The Control+ app just keeps playing that engine noise and absolutely nothing happens for minutes until I kill the app.
That is all. Without getting through calibration the model can't be operated.
Obviously I could have wired the 4 motors to the wrong sockets on the control box, but I'm absolutely certain I followed the instructions in the book correctly.
I double and triple checked at that point in the build as I found the pictures in the book not very clear at first. I'm VERY certain I got that right.
Even if I did got the motors mixed up I still expect to see some movement when trying to calibrate. But movement on the wrong parts.
Is there a known issue with the Control+ app for this set? (It works fine, using the same iPhone, with the 42100 Liebherr 9800 excavator set.)
Or do I really have to take the entire thing apart again to get at the wiring? It is really buried deep inside the model so that would be a real pain.