Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add wedsamuel1230/arduino-skills --skill arduino-serial-monitorgit clone --depth 1 https://github.com/wedsamuel1230/arduino-skillsWrote 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.
[](https://agentmods.dev/skills/wedsamuel1230/arduino-skills/arduino-serial-monitor)<a href="https://agentmods.dev/skills/wedsamuel1230/arduino-skills/arduino-serial-monitor"><img src="https://agentmods.dev/badge/skills/wedsamuel1230/arduino-skills/arduino-serial-monitor/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.
<a href="https://agentmods.dev/skills/wedsamuel1230/arduino-skills/arduino-serial-monitor"><img src="https://agentmods.dev/badge/skills/wedsamuel1230/arduino-skills/arduino-serial-monitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00061 | $0.01542 |
| Opus 5 | $0.00030 | $0.00771 |
| Sonnet 5 | $0.00012 | $0.00308 |
| Haiku 4.5 | $0.00006 | $0.00154 |
Grade B, and why
arduino-serial-monitor scanned grade B with 1 finding 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 12d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo usermod -a -G dialout $USER How it starts
The opening of the file, as written. The whole thing — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Arduino Serial Monitor
This skill provides advanced tools for reading and analyzing serial monitor data from Arduino boards, enhancing the debugging experience beyond the basic Arduino IDE serial monitor.
Features
- Real-time Serial Monitoring: Connect to Arduino serial ports and display data in real-time
- Data Logging: Save serial output to files with timestamps for later analysis
- Filtering & Pattern Matching: Filter output by keywords, regex patterns, or data types
- Error Detection: Automatically highlight common error patterns and warnings
- Multiple Format Support: Handle different data formats (text, JSON, CSV, binary)
- Cross-platform: Works with Windows, macOS, and Linux serial ports
Structured Debugging Workflow
- Record the exact board/revision, firmware/image identifier, toolchain and versions, port, baud, reset cause if known, and timestamp source.
- Prefer one line per event with stable fields such as
t_ms=123 level=INFO event=sensor_read value=...; keep secrets and tokens out of output. - Capture the unfiltered log before filtering. Preserve the first boot lines, reset/brownout/watchdog messages, and the transition that reproduces the symptom.
- Label conclusions as build, upload, hardware, system, or deployment evidence. Report the result by proof stages. A clean serial stream is not proof that pins, power, or the full system are correct.
- Pair with
hardware-tddfor a test matrix andembedded-project-loopwhen the next observation must come from a user-operated board.
Recommended C++ Event Format
Serial.print("t_ms=");
Serial.print(millis());
Serial.print(" level=INFO event=ready board=");
Serial.println(BOARD_ID);
Use a fixed, bounded format appropriate to the board's memory budget. Do not log Wi-Fi passwords, API keys, certificates, tokens, or private data.
Usage
Basic Serial Monitoring
# Monitor serial port with default settings (9600 baud)
uv run --no-project scripts/monitor_serial.py --port COM3
# Specify baud rate and output file
uv run --no-project scripts/monitor_serial.py --port /dev/ttyACM0 --baud 115200 --output debug.log
# Filter for specific patterns
uv run --no-project scripts/monitor_serial.py --port COM3 --filter "ERROR|WARNING"
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 209 lines · 61 tokens per session scan B f9454f3239da
arduino-serial-monitor is a skill published in the GitHub repository wedsamuel1230/arduino-skills (21 stars, last pushed 23d ago), licensed MIT. It adds 61 tokens to every session and 1,542 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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