Pocket Admin Toolkit v2 turns the Elecrow 2.8-inch ESP32 CrowPanel into a compact touchscreen toolkit for Linux, networking, DevOps and everyday system administration. The first version proved that a small ESP32 display could provide fast answers without opening a laptop or searching through online documentation. Version 2 expands the project into eight practical tools: • CIDR and IPv4 subnet calculator • VLSM network planner • World clock and time-zone converter • Cron generator and parser • Storage and backup capacity planner • Visual Linux chmod calculator • Wi-Fi and BLE wireless scanner • HTTP status code and TCP/UDP port reference Most tools work completely offline. No cloud service, backend, account, API key or Wi-Fi password is required. Wi-Fi and BLE remain disabled until the Wireless Scanner is opened, and the toolkit scans nearby signals without connecting to a network. Fast answers, local calculations and useful admin tools — all running directly on a 320 × 240 ESP32 to

I turned an ESP32 Bitcoin miner into a practical Pocket Admin Toolkit. After running for more than 100 days, my original Bitcoin mining experiment became something much more useful: a fully offline touchscreen toolkit for Linux, networking, and system administration. Everything runs directly on the ESP32. No Wi-Fi. No cloud. No accounts. No API keys. Just fast, offline tools that are always available. Features • CIDR & subnet calculator • Visual Linux chmod calculator • HTTP status code reference • Common network ports reference This is only version 1, and I already have ideas for many more features.

The heart of the project is the CrowPanel Advance, a compact and versatile device with esp32 that serves as the assistant's user interface. It's connected via WiFi to a dedicated AI server that I set up on an old laptop, which runs the Ollama software. This is the magic part: Ollama allows me to run powerful large language models locally, so all the processing happens right there.

Turning the CrowPanel Touchscreen into a DIY Laptop Drawing Board In this project, I'm using the CrowPanel Advance 7" touchscreen display along with an ESP32 microcontroller to build a custom drawing tablet that communicates with my laptop. The idea is simple: when I touch the CrowPanel, the ESP32 reads the touch coordinates and sends them in real time to my computer. This allows the panel to work like a sketchboard or basic graphics tablet — perfect for quick drawings, annotations, or testing out touch-based interfaces.