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I want to train Bittle in pybullet and then transfer it onto the robot.how should i do it?

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I trained a reinforcement learning model for my Bittle using Isaaclab. It can move around in a simulated physical world. I want to communicate with Bittle via my Mac, collect the angle of each joint as input to the trained policy model, obtain the joint angle at the next time step, and then send it to Bittle for execution. My question is, does Bittle provide this functionality (reading and writing joint angles)?

Hi everyone,

I’m trying to control Bittle using the sendCMD function. Originally this was done with the test8266Master example on an ESP8266, but since I don’t have an ESP8266 right now, I replaced it with an Arduino Mega 2560.

My idea is to connect both the MU camera and Bittle to the Mega. The Mega reads data from the camera, makes decisions, and then sends commands to Bittle. I’ve confirmed that the communication between the Mega and the MU camera works fine, and from the Mega side it looks like commands are being sent continuously.

However, Bittle doesn’t respond at all and doesn’t perform any actions. I’m not sure if replacing the ESP8266 with an Arduino Mega could cause any logical or communication issues, or if there’s something specific about how sendCMD needs to be sent (UART, baud rate, command format, timing, etc.) that I might be missing.

Has anyone…

My bittle is having trouble with backflips. He doesn't seem to jump high enough. This may be due to an old battery, but is there a way to fix this programmatically?

Hello!

I appreciate that the head connection for the Bittle has been designed so that the head pops off before damage occurs. This is great design but on both my Bittle X the head pops off almost every time the dog goes up side down and flips back to the standing position. For my workshops this is not ideal as every minute a kid comes running to ask me to fix the head. Do you have any good suggestion apart from super glueing the connection to make it less likely that the head comes off?

Thanks,

Michael

Hello, I am trying to connect a hacked 5V servo to the petoi bittle x. How can I achieve this? I've tried plugging it in to the 2 TX ports on the grove bord and adding servos in the src arduino folder, but it does not work. Does anyone have experience with this

I have rebuilt my opencat on an arduino Uno with I2C PWM, MPU and Eeprom. my former build had issues with wrong servos somehow. all the individual tests of modules are doing fine. but when I upload the main Opencat.ino. I have problems that the initialisation is stuck in a loop.

1. if I commect out MAIN_Sketch, after pressing Y for resetting the joints, it will jump to saving the skills, prompt Servo:25.00 and then a big bunch of lines stating only IMU, then the message: * Change model and board names in OpenCat.ino! and start from the beginning.

2. if I uncomment MAIN_Sketch, I get the prompt: Start , Nybble, N_250916 and again an bunch of lines with IMU and the loop back again to start,...ect.

Pretty sure this is some stupid small thing, but I please help.

thanks