Yngmar
Well-known member
I've made a thing. It's a very low cost barometric sensor that outputs NMEA 0183 barometric pressure (and temperature) sentences on a USB-serial interface (should be trivial to modify with an actual serial output, if you need that). Plug it into a computer with OpenCPN and you get a barograph (barometric pressure over time). Components should cost under £10 and you only need to solder together 4 wires and do a simple firmware upload. Maybe stick it in a plastic box.
If you're interested, I've written about it here and made the source code and instructions available for free.
If you're interested, I've written about it here and made the source code and instructions available for free.