# MrAgui

> Hardware tinkering, firmware and side projects: home Bitcoin miners, solar, electronics, DIY and coding with AI. Write-ups meant to save you a few evenings.

MrAgui (mragui.dev) is a personal blog of hands-on write-ups: open firmware for home Bitcoin miners (NerdQAxe++, Bitaxe, ESP32), solar inverters and Home Assistant over Modbus, electronics tools on macOS, and other DIY projects. Posts are first-hand: exact steps, commands, register addresses and wiring for things I actually built and ran. Every page is also available as plain Markdown at the same URL with `index.md` appended.

## Posts

- [Growatt inverter turning on and off every morning? Check the startup voltage](https://mragui.dev/posts/growatt-mic-startup-voltage/index.md): My Growatt MIC 2000TL-X kept connecting and disconnecting at sunrise and sunset. The cause was a startup voltage setting the app doesn't show. Here's how to change it over Modbus or from Home Assistant, and what it can't fix. (2026-10-13)
- [Open firmware for the 3.5" NerdQAxe++ clones, with optional Ethernet](https://mragui.dev/posts/nerdqaxe-big-screen-ethernet-firmware/index.md): The 480×320 NerdQAxe++ clones ship with closed firmware. I made a clean, auditable build from the open NerdQAxe+ source, with full big-screen support and optional wired Ethernet through a W5500. (2026-10-02)
- [Building Fritzing 1.0.7 from source on macOS with one script](https://mragui.dev/posts/building-fritzing-on-macos/index.md): A single script that builds Fritzing 1.0.7 natively on macOS, using only official dependency sources and nothing from SourceForge. (2026-10-01)

## Pages

- [About](https://mragui.dev/about/index.md): About MrAgui: hobby write-ups on home Bitcoin miners, solar, electronics, DIY, coding with AI and local LLMs. Not related to my day job.
- [Projects](https://mragui.dev/projects/index.md): Things I've built or ported.

## Optional

- [All posts in one file](https://mragui.dev/llms-full.txt): full text of every post, for loading into context in one go
- [RSS feed](https://mragui.dev/index.xml)
- [GitHub: AguiMr](https://github.com/AguiMr): source for the firmware and tools the posts describe