Become a sponsor to José M. Requena Plens

Firmware and software engineer in Valencia, Spain, with a research background in acoustics — metamaterials, simulation and measurement. These days I design embedded systems and the software around them: bare-metal MCUs, C, industrial communications and on-hardware testing.

The acoustics did not go anywhere. phonometry, the Python library I keep growing, is that half of the work made reusable: the metrology I used to write once per project, packaged so it can be checked against the standards it claims to implement.

Everything I build in the open, I also run in the open.

What your sponsorship supports

Most of my projects are libraries you install once and forget about. A few of them are services I host myself, on my own hardware, at home:

• mcp.jmrp.io — my Model Context Protocol servers, publicly callable. The Library Genesis one needs no account and no credentials; the GitLab one takes a per-request token and never stores it.
• The homelab around them, which also carries a Mastodon instance, a Matrix homeserver, an AT Protocol PDS, and Tor relays and bridges.

There is no hosting invoice behind any of that — there is hardware that wears out and electricity that does not stop. Sponsorship goes there, and towards the hours that never show up in a release note: reviewing dependency updates, answering issues, keeping the CI honest.

What I maintain

My papers, theses and software releases are archived with DOIs on Zenodo.

What I am building now

A hardware password manager for ESP32-S3, talking BLE to the device you are typing on. Most of my time goes there at the moment, and the posts I have been writing on device-bound key derivation and encrypt-then-MAC vaults are its engineering notes.

Where to find me

I write about what I build at jmrp.io — embedded cryptography, nginx hardening, MikroTik networking. On the fediverse I am @jmrplens@mstdn.jmrp.io, and my repositories mirror to GitLab.

Sponsoring is welcome but never expected: every one of these projects is MIT-licensed and will stay free whether or not anyone funds it.