What is cyton-dongle?

A hardware connection guide for receiving data from an OpenBCI Cyton or Cyton+Daisy brain-sensing board through its USB wireless dongle.

Use it to pair the devices, connect to the correct USB serial port, and read the board's 8- or 16-channel EEG data.

It explains the serial connection and the special radio-pairing step needed when a new dongle and board use different channels.

How plurigrid/asi configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to plurigrid/asi. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/plurigrid/asi/main/.claude/skills/cyton-dongle/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/plurigrid/asi

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/plurigrid/asi/cyton-dongle/github.svg)](https://agentmods.dev/skills/plurigrid/asi/cyton-dongle)

Your own site

<a href="https://agentmods.dev/skills/plurigrid/asi/cyton-dongle"><img src="https://agentmods.dev/badge/skills/plurigrid/asi/cyton-dongle/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/plurigrid/asi/cyton-dongle"><img src="https://agentmods.dev/badge/skills/plurigrid/asi/cyton-dongle.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,831 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00028	$0.02831
Opus 5.5	$0.00011	$0.01132
Sonnet 5.5	$0.00006	$0.00566
Haiku 4.5	$0.00003	$0.00283

Measured 2mo ago against content hash 4361c10a629a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cyton-dongle scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/cyton-dongle/SKILL.md · 260 lines

How it starts

The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cyton Dongle

USB wireless receiver (RFD22301/RFDuino) for OpenBCI Cyton 8/16-channel EEG board.

Hardware

Dongle: FTDI FT231X USB-UART → RFDuino 2.4 GHz radio
Serial: 115200 baud, 8N1
Device: /dev/cu.usbserial-* (macOS) or /dev/ttyUSB* (Linux)
Sample Rate: 250 Hz
Channels: 8 (Cyton) or 16 (Cyton + Daisy)
Packet: 33 bytes (0xA0 start, 24 bytes channel data, 6 bytes aux, 1 byte counter, 0xC0 stop)

First-Time Pairing (Critical)

A new dongle and board are typically on different radio channels. The standard 0xF0 0x01 channel-set command requires both sides to handshake — it fails when they're on different channels.

Use 0xF0 0x02 (CHANNEL_SET_OVERRIDE) to force the dongle to each channel without requiring board response, then check system status:

import serial, time

ser = serial.Serial('/dev/cu.usbserial-XXXXX', 115200, timeout=2)
time.sleep(2)

for chan in range(26):
    ser.reset_input_buffer()
    ser.write(bytes([0xF0, 0x02, chan]))  # override dongle (no handshake)
    time.sleep(0.5)
    ser.read(ser.in_waiting or 512)

    ser.reset_input_buffer()
    ser.write(bytes([0xF0, 0x07]))        # system status query
    time.sleep(0.5)
    resp = ser.read(ser.in_waiting or 512).decode('utf-8', errors='ignore')

    if 'System is Up' in resp:
        print(f'FOUND BOARD ON CHANNEL {chan}')
        break
    else:
        print(f'Ch {chan}: Down')

ser.close()

Radio Commands (0xF0 prefix)

Bytes	Command	Notes
`0xF0 0x00`	CHANNEL_GET	Returns current dongle channel
`0xF0 0x01 <ch>`	CHANNEL_SET	Coordinated change, requires board online
`0xF0 0x02 <ch>`	CHANNEL_OVERRIDE	Dongle-only, no handshake — use for pairing
`0xF0 0x03`	POLL_TIME_GET	Current poll time
`0xF0 0x04 <t>`	POLL_TIME_SET	Set poll time
`0xF0 0x05`	BAUD_DEFAULT	115200
`0xF0 0x06`	BAUD_FAST	230400
`0xF0 0x07`	SYS_STATUS	"System is Up" or "System is Down"
`0xF0 0x0A`	BAUD_HYPER	921600

Read the full file on GitHub · 260 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 260 lines · 28 tokens per session scan A 4361c10a629a

Subscribe to this mod's changes

cyton-dongle is a skill published in the GitHub repository plurigrid/asi (72 stars, last pushed 7d ago), licensed MIT. It adds 28 tokens to every session and 2,831 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

Hardware and IoT Scientific

cyton-dongle next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
cyton-dongleplurigrid/asi	Skill	72	7d ago	MIT	A	28	Claude Code
neuroskill-bciNousResearch/hermes-agent	Skill	261k	yesterday	MIT	A	18	Claude Code, Codex
ruview-applicationsruvnet/RuView	Skill	103k	yesterday	MIT	A	79	Claude Code
lab-hardware-cadK-Dense-AI/scientific-agent-skills	Skill	56k	4d ago	MIT	A	108	Claude Code
pylabrobotK-Dense-AI/scientific-agent-skills	Skill	56k	4d ago	MIT	A	49	Claude Code
pybammK-Dense-AI/scientific-agent-skills	Skill	56k	4d ago	MIT	A	70	Claude Code, Codex
calibrate-roomruvnet/RuView	Skill	103k	yesterday	MIT	A	41	Claude Code

asi: Skill for Claude Code