Open source · free files
Koriobots
Other · Intermediate
- Score
- Buildability 98 out of 100
- Cost
- $972.06≈ €866
Photo and 3D model
Its license doesn't let Robotheca show its photos.
3D model loaded from the original files on GitHub at 4a2cfc2, under CC-BY-NC-4.0. View the original files from GitHub (23.6 MB) (opens in a new tab)
Non-commercial license
GrowBot
Other
An AI creature that lives in a phone and grows up from its own experiences, sensing, moving and remembering the world around it on a small robot body.
Project information
- Buildability
- 63/100Buildable with some effort
- Estimated cost
- Not stated
- Level
- Beginner
- Parts
- 6 lines
- Tools
- 3D printer
- Hardware license
- CC-BY-NC-4.0 (opens in a new tab)
- Software license
- PolyForm-Noncommercial-1.0.0 (opens in a new tab)
- Commercial use
- Not allowed
- Works with
- micropython
A non-commercial license (CC-BY-NC) does not allow selling kits or parts.
Some folders have their own license: agent-harness/ (CC-BY-NC-4.0).
This repository contains executable files that Robotheca doesn't check. Only run them if you trust the creator.
Which files (1 firmware image)
Suggested by Robotheca, created by @britcruise9 (opens in a new tab), from github.com/britcruise9/GrowBot (opens in a new tab), pinned to commit 4a2cfc2 (opens in a new tab). You buy the parts yourself; Robotheca doesn't sell robots.
What to buy
6 lines, read from BOM.md at 4a2cfc2
6 of 6 parts shown
| Item | Part | Qty | Unit price | Amount | Source |
|---|---|---|---|---|---|
| Parts | |||||
| 01 | Raspberry Pi Pico 2 W | 1 | – | – | – |
| 02 | MG90S micro servo | 2 | – | – | – |
| 03 | Waveshare Pico Servo Driver | 1 | – | – | – |
| 04 | AA batteries | 4 | – | – | – |
| 05 | 4×AA battery holder | 1 | – | – | – |
| 06 | Double-sided foam tape | 1 | – | – | – |
- Parts
- 1Raspberry Pi Pico 2 W––
- 2MG90S micro servo––
- 1Waveshare Pico Servo Driver––
- 4AA batteries––
- 14×AA battery holder––
- 1Double-sided foam tape––
6 of 6 needed parts have no price in the source, so there is no parts total.
Why it scores 63
It measures the published files, not the robot · How we score
63/100
Buildable with some effort
How complete the published files are for rebuilding this robot, measured by Robotheca at commit 4a2cfc2. It isn't a rating of the robot. Counted out of 80 points and scaled to 100: the parts that don't apply to this robot are left out.
- 13D and CAD files3 printable parts (STL, 3MF).Add the CAD source (STEP, or the CAD program's own files) so people can change the design.10/20
- –Robot descriptionNo URDF. Not counted: the score is made of the parts that apply.Optional: add a URDF, and the robot can be seen in 3D and tried in the browser.Not counted
- 2Parts list6 lines: 0 with a price, 0 with a shop link.Most points to gain: Add prices to 6 lines. Add shop links to 6 lines.5/20
- 3SoftwareCode in this repository, instructions to install or run it, built on micropython.15/15
- 4DocumentationREADME of 2,518 characters with 0 pictures; 4 build steps.Show the robot and its assembly in pictures in the README.10/15
- –SimulationNo simulation files. Not counted: the score is made of the parts that apply.Optional: add a simulation model (MuJoCo, Gazebo, Webots or Isaac).Not counted
- 5LicensesHardware: CC-BY-NC-4.0; software: PolyForm-Noncommercial-1.0.0.10/10
Build it
The creator's 4 steps, each linked to its instructions
- Build the robot body using the guide at growbot.dev/build
- Install the chip software with the USB installer
- Open growbot.dev on the phone that rides the robot
- Pair the phone with the robot in the last step of the build guide
The guide appears here as you scroll.
Guide by @britcruise9 (README.md). Its license (CC-BY-NC-4.0 (hardware) and PolyForm-Noncommercial-1.0.0 (software)) doesn't let everyone reuse it. To reuse it, ask the creator on GitHub (opens in a new tab). Creators can ask Robotheca to remove it at contact@robotheca.org.
More guides
Wiring and electronics
Notes written by Robotheca from the project's documents, not by its creator
Main parts: Robotheca's summary
- Two MG90S micro servos, one per leg, mounted on servo horns.
- Waveshare Pico Servo Driver board, or a Kitronik or generic PCA9685 servo carrier board.
- Phone running the GrowBot app, providing camera, IMU and the AI brain.
- AA batteries in a 4×AA battery holder to power the body.
Connections: Robotheca's summary
- Servos connect to the servo driver board; port 1 is the left leg and port 3 is the right leg.
- On a bare Pico without a carrier board, the servo signals are driven directly from GP0 and GP1.
- The Pico joins Wi-Fi in the 2.4 GHz band and connects to the GrowBot relay.
- The phone supplies the IMU data to the walk policy; the body receives leg poses from the phone over the relay.
What it can do: Robotheca's summary
Written by Robotheca from the project's documents, not by its creator
- Walks on two servo-driven legs using a small neural-network walk policy that turns IMU readings into leg swing commands.
- Can spin in place using a trained spin policy, per the app's stock leg spin.
- Phone acts as the AI brain and sensor hub, streaming leg poses to the robot body over a relay.
- Remembers images shown to it and can recall or compare them, with saved views kept in the phone browser.
- Can be driven by a user's own AI agent through an agent harness, with a safety layer between agent and robot.
- Can also be ported to other machines, such as a robot lawnmower, using the same brain-to-body contract.
- Chip-side software holds a link to the relay with heartbeat and re-dial, and can open a setup network for new Wi-Fi.
Works with AI
Found by Robotheca in the project's files at commit 4a2cfc2, its robot.yaml and Robotheca's notes on its documents. Never guessed; Robotheca doesn't run the code.
“Phone acts as the AI brain and sensor hub, streaming leg poses to the robot body over a relay.”
Robotheca's summary: What it can do“Can be driven by a user's own AI agent through an agent harness, with a safety layer between agent and robot.”
Robotheca's summary: What it can do“For the agent harness, run node reference-loop.mjs with Node 18 or later, optionally with an OpenRouter key or a local OpenAI-compatible server.”
Robotheca's summary: How to run it
Software
- Framework
- micropython
- Languages
- JavaScript, Python
- License
- PolyForm-Noncommercial-1.0.0
Robotheca doesn't review code. Read it before running it.
How to run it: Robotheca's summary
Written by Robotheca from the project's documents, not by its creator.
- 1Build the body following the growbot.dev build guide, which installs the chip software over USB and saves Wi-Fi settings.
- 2Or install by hand: flash micropython-pico2w.uf2 by dragging it onto the RP2350 drive in BOOTSEL mode.
- 3Copy secrets.example.py to secrets.py and fill in Wi-Fi details, then copy PicoRobotics.py, act_engine.py, secrets.py and relay_chip.py (as main.py) to the Pico with mpremote.
- 4Run mpremote reset, then note the PAIRING CODE the chip prints and pair it with the app.
- 5Optionally run hello_legs.py as main.py first to check the servos without Wi-Fi.
- 6For the agent harness, run node reference-loop.mjs with Node 18 or later, optionally with an OpenRouter key or a local OpenAI-compatible server.
Software that runs on this robot
No software from Robotheca's catalogue found in this robot's files yet. Links come from its robot.yaml, its dependency files read as text, or Robotheca's editors.
The code
Free files
Every file of the project, at commit 4a2cfc2.
Community
- Issues on GitHub (opens in a new tab)
- Pull requests on GitHub (opens in a new tab)
- Are you the creator? Manage this robot
- Report outdated info
- Report this robot
Questions and improvements go to the creator's repository.
Add a badge to your README
For the creator: two badges that link back here. The second always shows this page's current label and score.
Markdown (one click selects it)
[](https://robotheca.org/robots/growbot) [](https://robotheca.org/robots/growbot)
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〈第2.1世代〉ころボ / KOROBO (2.1 Gen)
Other · Intermediate
- Score
- Buildability 88 out of 100
- Cost
- Not stated
≈ € values are approximate, converted at the ECB euro reference rate of 5 Nov 2026. The creator's original price always comes first.