I have a Robot Hat for Raspberry Pi attached to an RPi v4 running latest RaspiOS. The hat functions correctly, including the speaker, except for continuous rotation servos. No matter what the setting that I use with the examples, I cannot send a command to get them to stop once they’ve started. I’ve read through the forums and nothing similar has been posted. The examples are all for fixed position.
From other forum posts for other servo Hats (like Adafruit), I know it’s possible but I’m not sure the Servo library for this hat has that function built in.
Thanks,
DJ
Please provide us with the problem video to service@sunfounder.com so that we can analyze and resolve the issue.
Our robot hat servo library does not have this functionality built-in. You need to run the example code to make the servo work.
We suggest reinstalling the Raspberry Pi system and then reinstalling the robot hat library. After that, check if the servo starts working automatically upon startup.
I think you answered the question by saying “Our robot hat servo library does not have this functionality built-in.” I’m curious though because even by sending a 1500 msec pulse should stop the continuous rotation servo. I’ve not been able to get the servo to stop moving no matter how much I adjust the nulling potentiometer on the servo. My example for two servos attached is:
from robot_hat import Servo
Create Servo object with PWM object
servo0 = Servo(“P0”)
servo1 = Servo(“P1”)
servo0.pulse_width_time(2500)
servo1.pulse_width_time(2500)
This is pulled from the example in: https://docs.sunfounder.com/projects/robot-hat-v4/en/latest/api_servo.html
Could there be a way possibly using the PWM class instead?
Thanks,
DJ
Do you have other Raspberry Pi board? If so, you can try replacing the current one with a different Raspberry Pi and see if the same issue occurs. If the problem persists, it’s possible that there might be an issue with the Robot HAT pins.