Gfrör.li is a project that allows people to see local water temperatures in real-time. We use self-built sensors, that measure the local temperature every 15 minutes and send them to our back-end using the The Things Network. From there we request the aggregated data to present them to the user.
If you have some feedback and/or requests, including sponsoring or placing your own sensor, please contact us by Email or via Mastodon @coredump_ch or @makram_95!