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 alexex1993/mcu-skills --skill esp32-wroom-30pingit clone --depth 1 https://github.com/alexex1993/mcu-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/alexex1993/mcu-skills/esp32-wroom-30pin)<a href="https://agentmods.dev/skills/alexex1993/mcu-skills/esp32-wroom-30pin"><img src="https://agentmods.dev/badge/skills/alexex1993/mcu-skills/esp32-wroom-30pin/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/alexex1993/mcu-skills/esp32-wroom-30pin"><img src="https://agentmods.dev/badge/skills/alexex1993/mcu-skills/esp32-wroom-30pin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium analysis-evasion · line 1 Suspicious Unicode normalization or mixed-script contentFix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
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 | $0.00000 | $0.03980 |
| Opus 5 | $0.00000 | $0.01990 |
| Sonnet 5 | $0.00000 | $0.00796 |
| Haiku 4.5 | $0.00000 | $0.00398 |
Grade A, and why
esp32-wroom-30pin 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 235 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ESP32-WROOM-32 devkit — 30-pin
The commodity ESP32 board: ESP-WROOM-32 module, USB-serial bridge, LDO, two buttons,
15 pins a side. It is the one that fits a breadboard with a row free, which is why it
outsells the 36- and 38-pin versions.
Nearly every failure on this board comes from a pin that has a second job. Read
reference/board-hardware.md before choosing pins rather than guessing from a tutorial —
a lot of ESP32 tutorials were written for a different board size.
reference/board-hardware.md— the board: header pin map with every pin's alternate functions, what is not broken out and why that helps, the USB bridge and auto-reset circuit, power tree, flash partitions — plus a development guide (§10 toolchain, §11 sdkconfig, §12 flashing and recovery, §13 peripheral cookbook, §14 symptom → cause → fix table).reference/esp32-soc.md— the silicon: pins that do not exist, strapping semantics and theGPIO_STRAP_REGbit order, ADC/DAC/touch maps and accuracy, IO_MUX vs GPIO Matrix and the SPI speed rule, power modes, memory map, deep-sleep wake pins.reference/esp32-family.md— the rest of the family, for "should this be a different ESP32?" questions: what does and does not port between chips, radio and USB capability per chip, the RMT generation table (WS2812 under Wi-Fi load), deep-sleep memory and ULP/LP-core availability, and a chip-selection table.reference/recipes.md— code that compiles:platformio.ini,sdkconfig.defaults, ADC1 with calibration, LEDC LED and servo, debounced input, the new I2C master driver, 80 MHz SPI, UART2, Wi-Fi scan and station connect, NVS, deep sleep, RMT WS2812.template/— a project that builds clean, in two variants, plus a scaffold script. Seetemplate/README.md.
Orientation
| Module | ESP32-WROOM-32 (ESP-WROOM-32), ESP32-D0WDQ6 or D0WD-V3, Xtensa LX6 dual-core @ 240 MHz |
| Memory | 4 MB in-package flash, 520 KB SRAM (~320 KB linkable), 8 KB RTC FAST + 8 KB RTC SLOW. No PSRAM |
| Header | 30 pins, 15 per side. 25 GPIOs, 2× GND, VIN, 3V3, EN |
| USB | No USB peripheral in the chip. A CH340G/CP2102 bridge on UART0 (GPIO1/GPIO3), with DTR/RTS auto-reset |
| Console | UART0 @ 115200 only. There is no USB-Serial-JTAG and no debug header |
| LED | one blue user LED on GPIO2, active high (a strapping pin) |
| Buttons | BOOT = GPIO0, pressed low, not on the header · EN/RST acts on CHIP_PU, not readable |
| Free pins | 4, 13, 14, 16, 17, 18, 19, 21, 22, 23, 25, 26, 27, 32, 33 |
| Input-only | 34, 35, 36 (VP), 39 (VN) — no output driver, no internal pulls |
| Strapping | 2, 5, 12 (MTDI), 15 (MTDO) — usable, with the caveats in rule 2 |
| Analog | ADC1 on 32–36, 39 · ADC2 on 0, 2, 4, 12–15, 25–27 · DAC on 25 and 26 |
| Radio | Wi-Fi b/g/n + Bluetooth 4.2 BR/EDR + BLE, PCB antenna on the module |
| Power | 3V3 out (~600 mA budget) · VIN 5–12 V in, 5 V out. No ORing diode |
| Toolchain | PlatformIO 6.1.19 + platform-espressif32 7.0.1 + ESP-IDF 6.0.1, board = esp32dev |
What ships with it
20 files 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.
- assets/IMAGE.md 453 B
- reference/board-hardware.md 18 KB
- reference/esp32-family.md 22 KB
- reference/esp32-soc.md 16 KB
- reference/recipes.md 20 KB
- template/.gitignore 139 B
- template/CMakeLists.txt 114 B
- template/include/app.h 696 B
- template/include/board.h 4.7 KB
- template/partitions.csv 217 B
- template/platformio.ini 613 B
- template/README.md 2.7 KB
- template/sdkconfig.defaults 454 B
- template/src/analog.c 2.5 KB
- template/src/board_report.c 5.4 KB
- template/src/CMakeLists.txt 289 B
- template/src/main.c 5.4 KB
- template/src/wifi_scan.c 2.4 KB
- template/variants/minimal/main.c 1.5 KB
- template/variants/new-project.sh 1.7 KB runs code
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.
- 8d ago Changed · +4 lines 1637e134f0ef
- 12d ago First seen · 231 lines · 0 tokens per session scan A 09624e54f74b
esp32-wroom-30pin is a skill published in the GitHub repository alexex1993/mcu-skills (17 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,980 tokens. 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 2026-08-30.
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