Blog
Sign inNotes from the field: public transport, fare collection, hardware and software that has to work on the road.
2026
What happened after the second post about urMQTT: SQLite isolated outside the kernel, measurements against Mosquitto on the same VPS (including what did not go in our favour), the causes found for the slow single flow, configuration as data with a web ISO builder and an emulator in the browser, optional plain MQTT and what is still not proven.
Configure and download your own ISO →
What happened to the three promises from the first urMQTT post (a single ISO, a raw disk without a filesystem, provably secure) after the first four days of development, with measurements, tables and a list of what is still not done.
Configure and download your own ISO →
Development notes on urMQTT, a unikernel written in Rust that is itself an MQTT broker: a single ELF with its own TCP/IP, TLS 1.3, broker and SQLite, booted from a single ISO.
Configure and download your own ISO →
Why a company that builds terminals, apps and electronics for public transport is starting to write, and what you will read about here.