For an easy to use measuring solution you will need only one or a few Ruuvi sensors and the Ruuvi mobile app. Ruuvi sensors send measurement data, which can be read with a smartphone, via Bluetooth. In the app, you may set alerts and customise the sensors to your liking.
This setup is up and running within a few minutes. No pairing is needed.
For Direct2water the interest in RUUVI is for completing the integration with the Victron CERBO GX to add environmental parameters capability.
Please have a look at : https://ruuvi.com/ideas/
and you can order on our site very soon.