Melvin MupondoriNotes on software, infrastructure, hardware experiments, mistakes and the process of figuring out how systems work.https://mups.co.zw/en-gbListening to an Abandoned BMW E87 with an ESP32 and MCP2551https://mups.co.zw/blog/esp32-can-bus-bmw/https://mups.co.zw/blog/esp32-can-bus-bmw/Listening at the OBD-II port, finding K-CAN behind the radio, picking the wrong bit rate, and finally getting 400 frames a second out of a car that's been sitting for who knows how long.Tue, 16 Jun 2026 00:00:00 GMTReading a MUST PV1900 solar inverter over RS485 with an ESP32https://mups.co.zw/blog/esp32-rs485-solar-inverter/https://mups.co.zw/blog/esp32-rs485-solar-inverter/Wiring an ESP32 into a MUST PV1900 over RS485, and what a warning buried in someone else's source code taught me about respecting undocumented hardware.Sun, 14 Dec 2025 00:00:00 GMTThe port collision that changed how ZenHost routes appshttps://mups.co.zw/blog/zenhost-network-namespaces/https://mups.co.zw/blog/zenhost-network-namespaces/How a port collision exposed the wrong hosting abstraction and led ZenHost to isolate apps with Linux network namespaces and Caddy.Wed, 18 Jun 2025 00:00:00 GMT