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Creator · PetoiCamp
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Prompt
What it is: OpenCat is an open-source Arduino + Raspberry Pi quadruped robotics framework maintained by Petoi. Founder Rongzhong Li began developing it in a Wake Forest University dorm room in 2016, with the goal of making agile quadruped robots accessible to researchers, educators, and hobbyists. It now powers two product lines: the Bittle robot dog and the Nybble robot cat. Hardware list and approximate cost: The core component is the ATmega328P-based NyBoard controller, which can coordinate up to 12 servos for walking, running, jumping, and even backflips. Optional additions include a sensor pack, camera module, or a Raspberry Pi/Jetson Nano as an AI coprocessor. The complete robot is typically purchased as a Bittle or Nybble kit. Refer to the current prices on Petoi’s official website for the actual purchase price; this repository’s README does not provide a single standard price for a complete robot. Build overview: 1. Clone the repository and remove the -main/branch-name suffix from the folder name 2. Open OpenCat.ino and select the robot model (BITTLE/NYBBLE) and board version (NyBoard_V1_0, etc.) 3. Comment out MAIN_SKETCH to enter configuration mode, then upload the firmware 4. Set the Serial Monitor to no line ending and 115200 baud, then follow the prompts to zero the joints and calibrate the IMU, with the body placed flat on a table 5. After calibration, uncomment MAIN_SKETCH, switch back to main program mode, and upload again 6. Control the robot using the infrared remote, Petoi App, Python, or serial commands Getting-started advice: This repository is for the older NyBoard hardware based on the ATmega328P. For the newer ESP32/BiBoard hardware, use the OpenCatESP32 repository. The code will not match if you buy the wrong board. Note: The cost tier is an editorial estimate; no official total price for the complete robot has been published.
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