We are attempting to set up our PiCar-V. Everything else seems to be working so far, but:
When using the PiCar’s IP address remote control, the car goes forward as it should. However, when attempting to reverse, the left wheel continues to rotate forward instead of backward. The right wheel rotates backwards as it should. Our wiring is as instructed, and if we test flip the A1/A2 and B1/B2 pins the other way around the faulty turning direction simply moves to the other wheel.
We haven’t modified any files from the GitHub downloads, so everything is as it “should” be. We had an issue with the Motor Driver Module not getting any power from the Motor Hat, but we re-soldered the HAT pins and then the MDM got power. Haven’t done any other modifications or changes to code. I don’t know if this is relevant, but we also had the issue with the front wheel test not completing. There were no weird outputs, the test simply stopped midway through.
Does anyone have any suggestions what to do? Could the fault still be in the initially faulty Motor Hat, or in the code?
Please follow the tutorial to align the front and rear wheels. https://docs.sunfounder.com/projects/picar-v/en/latest/remote_control.html
Click on Full Screen to return to the title bar, then click on the Settings button in the upper right corner of the page to enter the calibration page:
Calibration is divided into three parts: camera calibration, front wheel calibration and rear wheel calibration.
When you enter this page, the car will move forward; if not, please click the “Left/Right” button in the rear wheel calibration to adjust the angle of the wheel.
We also suggest you to provide us a video of your problem, so that we can help you to analyze and solve the problem.
Suggest adjusting the motor reverse by modifying the config file in the SunFounder_PiCar/picar directory. Let’s see if that solves the problem.
cd ~ #jump to the pi directory
cd SunFounder_PiCar/picar #Jump to the folder where the config file is located.
sudo nano config #Modify the command
The contents of the file are as follows:
File based database
turning_offset = 0
foruard_A = 0
Foruard_B = 0
Explanation: 1. forward_A and forward_B each represent a rear wheel, and their values can be assigned to 0 or 1.
0 and 1 each represents a direction
Hi! We have already tried this. It seems to have no effect at all on the car. We are sure we saved the file correctly, etc. We have also tried manually changing the reverse function in rear_wheels to spin the left wheel the other way around, and that did nothing as well. The left wheel seems completely immune to instruction.
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