Help. My Pidog is unable to move. It can play sounds and have video, but no servos turn at ALL. not a single twitch. the LED lights at the front isnt working either.
tell me if u need more photos. I ran the i2cdetect thing and it had like nothing on bus 1
If you connect an external power supply to the Raspberry Pi, the Pi can still boot up, play sounds, and capture video. However, the servos, LED strip, and other sensors require power from the Robot HAT to function.
Could you please check whether the power switch on the Robot HAT is turned to ON, and whether the power indicator LEDs are lit? If the LEDs are not on, you can try charging the Robot HAT by connecting an external Type-C power supply to it.
Additionally, if you press the ZERO button, all servos on the PiDog should go through a calibration cycle, and the PiDog should end up in a lying-down posture.
If the issue still persists after trying the above, please take a short video or a photo showing the Robot HAT’s power switch in the ON position and send it to us for further analysis.
If i press the zero button, every servo moves and locks
when does the mod come
When you were assembling the robot, did you perform the steps while the Robot HAT was powered on? In other words, did you strictly follow step 11 of the assembly manual, and then proceed with steps 20, 22, 25, 27, etc., without disconnecting the power?
You mentioned: “If I press the zero button, every servo moves and locks” — this actually sounds like normal behavior. If the servos are at the correct angle at that moment, then the PiDog should be ready to execute movement commands properly.
I’d like to check the posture of your robot dog after pressing the ZERO button while it’s powered on. Could you place it on a table and observe whether its legs are in the correct position? If the angles are off at this point, it may cause the robot to get stuck or move incorrectly.
i think i assembled the legs at the wrong angle since the zero button has some really lopsided legs, but i dont think it solves the main problem of the servos not moving. even if i run the calirbation script, it doesnt lock or move.
Regarding the incorrect initial angle of the servo during leg assembly, please follow the steps below to return the servo to zero and assemble it:
1.Power on the robot hat5.
2.Briefly press the zero button.
3.Connect the servo cable to the PWM pin. At this point, you will see the servo return to the zero position.
4.Do not unplug the servo that has been zeroed yet. First, follow the assembly steps to fix and assemble the servo, then disconnect the zeroed servo.
5.Repeat steps 3 and 4 to zero and assemble the remaining servos one by one.
The zeroing and assembly procedure is the same for all 12 servos. After completing the full assembly of PiDog, proceed to run the calibration example to calibrate the servos.
Regarding the issue of no servo movement when running the calibration script? (Neither locked nor moving)
After running the calibration code to calibrate a specific servo, do all servos fail to respond? Or is it just a particular servo? All servos moved and locked normally during zeroing, correct?
If the calibration script fails to trigger a servo response, it is likely due to a hardware fit issue caused by assembly deviation or an underlying connection/command issue when running the script.
Check whether the I2C port is enabled. Run the calibration script using the correct command:
sudo python3 0_calibration.py
If there is still no response, check each servo cable connection one by one for looseness.
