ClaudSkills / Engineering / engineering-misc

Esp32s3 Rlcd42

Q: What is a Claude Code skill and how does the Esp32s3 Rlcd42 skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Esp32s3 Rlcd42 is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: engineering-misc · Last updated: 2026-10-25

Firmware development for the Waveshare ESP32-S3-RLCD-4.2 (SKU 33298 / 33507, and the -EN variant) — an ESP32-S3-WROOM-1-N16R8 AIoT board built around a 4.2" fully reflective 300x400 monochrome LCD on a Sitronix ST7305/ST7306, with no backlight, plus an ES8311 speaker codec, an ES7210 dual-microphone ADC, an SHTC3 temperature/humidity sensor, a PCF85063A RTC, a microSD/TF slot on SDMMC, an 18650 holder with battery sensing, BOOT/KEY/PWR buttons and a 2x8 2.54 mm expansion header. Use when working on this board: project setup, platformio.ini, the qio_opi PSRAM memory type, the pin map and which header pins are traps, U8g2 and the ST7305 constructor, a blank or shifted panel, ST7305 low-power mode HPM/LPM, the shared I2C bus and its four slaves, I2S audio directions and the speaker amplifier enable, mounting the TF card, battery voltage, USB CDC console with no UART bridge, flashing over Type-C, deep sleep, or debugging why something on the board does not work.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

A 4.2" reflective panel with no backlight, an audio front end, four I2C slaves and an 18650, on an N16R8 module — and four free GPIOs on the header when you are done.

What this skill does

Esp32s3 Rlcd42 is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/esp32s3-rlcd42/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when working on this board: project setup, platformio.ini, the qio_opi PSRAM memory type, the pin map and which header pins are traps, U8g2 and the ST7305 constructor, a blank or shifted panel, ST7305 low-power mode HPM/LPM, the shared I2C bus and its four slaves, I2S audio directions and the speaker amplifier enable, mounting the TF card, battery voltage, USB CDC console with no UART bridge, flashing over Type-C, deep sleep, or debugging why something on the board does not work.

Who uses this skill

The Esp32s3 Rlcd42 Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/esp32s3-rlcd42
curl -L https://claudskills.com/skills/esp32s3-rlcd42/SKILL.md \
  -o ~/.claude/skills/esp32s3-rlcd42/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/esp32s3-rlcd42/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/esp32s3-rlcd42/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\esp32s3-rlcd42\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Esp32s3 Rlcd42 Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/esp32s3-rlcd42/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Esp32s3 Rlcd42 skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Esp32s3 Rlcd42 skill?

Use Esp32s3 Rlcd42 when your Claude Code task falls under the Engineering category — specifically in the engineering misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Esp32s3 Rlcd42" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Esp32s3 Rlcd42 skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Esp32s3 Rlcd42 is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/alexex1993/mcu-skills/blob/HEAD/skills/esp32/esp32s3-rlcd42/SKILL.md
License: MIT
Author: alexex1993
Website: https://habr.com/ru/articles/1076082/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

alexex1993. (2026). Esp32s3 Rlcd42 [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/esp32s3-rlcd42/

BibTeX

@misc{esp32s3-rlcd42-2026,
  author    = {alexex1993},
  title     = {Esp32s3 Rlcd42 [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/esp32s3-rlcd42/}
}

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Badge

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Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/esp32s3-rlcd42/#security)

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Browse all Engineering skills → Top 100 skills

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