wmbusmeters, parse data from your utility meter - nice free software
There is a European standard for reading utility meters like water, gas, electricity or heat distribution meters. The Meter-Bus standard (EN 13757-2, EN 13757-3 and EN 13757–4) provide a cross vendor way to talk to and collect meter data. I ran into this standard when I wanted to monitor some heat distribution meters, and managed to find free software that could do the job. The meters in question broadcast encrypted messages with meter information via radio, and the hardest part was to track down the encryption keys from the vendor. With this in place I could set up a MQTT gateway to submit the meter data for graphing.