Hello everyone,
I was making a rc car with 4 dc motors, all controlled via Bluetooth. They were working fine wirelessly, but when I set them up in the car, they suddenly stopped working. I am giving commands to the Bluetooth module, but the dc motors are not obeying the commands. Otherwise the motors work fine in a manual program. I don't think there is a power problem as I have given them two batteries(9V) and a power bank source of power. Please help me to find the problem!!
I expect the problem is in either the code you are using or your components or the way everything is connected up or powered. You haven't provided details of any of those.
Sounds like probably power to me but I can't even guess how you might have two 9V batteries and a power bank connected.
Steve