Hi, I'm Wuming.
Notes, projects and twenty years of writing. I'm a software engineer and tinkerer. I've been writing here since 2005: about life abroad, code, Raspberry Pi and Arduino projects, AI Harness, and the occasional poem. Most of the older posts are in Chinese.
Recent writing All 214 posts →
- 一台平板，一只 dongle，没有电脑也没有 root（七·完）
- VMware 偷走了我的 IPv4：一次纯靠 IPv6 完成的远程抢救
- 让 iPhone 拨打一张不在 iPhone 里的 SIM 卡（六）
- 同一只 dongle 插在 Mac 上：没有驱动的平台怎么办（五）
- 声音从哪来，到哪去：USB 话机、浏览器通话和一块 ESP32（四）
- 没有信号也能打电话：在树莓派上从零实现 VoWiFi（三）
- 把 SIM 卡变成一台服务器：树莓派上的短信与 eSIM 网关（二）
- 一只大疆 4G dongle，拆开发现里面跑着 Linux（一）
- Finally, I am back
- Recovering a 20-year blog from the Wayback Machine
Projects All projects →
ccnote — notes you save by CC'ing an email Every account gets an email address. CC or forward an email to it and it becomes a note. Lemon Call 檸檬通話 Turns an Android tablet or a Windows PC into a phone with a small USB LTE dongle. No root needed, and VoLTE works even with a roaming SIM. TokenPie Token派 A self-hosted gateway for all of a company's AI model traffic, with sign-in, budgets, rate limits, security checks and an audit trail.