Here his video regarding tat topic: https://www.youtube.com/watch?v=xTgnJ6OWxfQ

There is a nice one too regarding pico pi: https://github.com/kevinmcaleer/PicoCat

That's great, thank you for sharing!

Impressive work, congrats!

Hey, nice 1. April post :-) Let's give us a try!

How loveley :)

Have you tried another cable?

Thank you, Li! Where comes the 57, 0, 0, 1, <- 4th entry from?

I wouldn't have as much patience as Li. :-)

Wow, I am impressed of this discussion, can't wait to dive into it! Thanks for sharing!

5200mAh, 80 C Lipo -> +- 30 Minutes

Still needs some calibration, but works :) WhatsApp Video 2020 06 17 at 17 07 45

Same Type but the 9685 from different manufacturer. But was not the problem. It turned out that the SBEC that brings the voltage to 5 V is not a stable source. Although the SBEC is supposed to deliver 20 A (JVSISM YPG 20A HV), the voltage seems to fluctuate with the known consequences. The SBEC only supplies the electronics (+servo signal), the servos (+,-) I operate directly on the Lipo. I have built in a Supercap 5.5V, 0.47F to buffer the voltage. Since then Big Bela behaves well. I will now test and train, then I will show you what she can do. Thanks for your tireless support, Li. Xie Xie!

Well, using a 5200mAh, 80 C Lipo and twisted the servo wires: replaced the Arduino pro mini -> behaves even worse, behave strangely after connecting 8, 9 and 12. Replaced the PCA9685 -> works much better until I I connect the shoulder servos 6 and 7 (4 and 5 still left not connected) behaves strange again. Next I will replace the MPU6050, I know it's doable!!!

Ok, thanks for the hint,I will give a try. Using a different (but weaker) lipo worked until now, but I did not test it much yet. And yes, its the sport micro body I choosed because its very stable and robust.

Thank you for your reply! I supply the servos directly from the battery, the signal goes via the PCA9685 to the servos. I supply the Arduino Pro Mini and the other parts with a JVSISM YPG 20A HV SBEC with 5V. I have not measured the current it draws when misbehaving. Was max. 1 Ampere when walking (kwk) for each leg (3 servos / leg). Must be much more when stalled but the lipo should can handle even that.

Well done! Wanna see her walking, where is the video? ;) I usually have to reset up the direction of rotation when using different servos: int8_t rotationDirections[] = { 1, -1, 1, 1, -1, 1, 1, 1, 1, 1, 1, -1, 1, -1, 1, -1 }; At the moment I am building a big one using JX PDI-HV5523 HV servos and spot micro body.

The question of the question. What servos do you use?

Bela felt in love with him!!!!

Try to set in bus.py: port = '/dev/ttyS0' If it still does not work try: pip uninstall serial pip install pyserial