Know how much water is left in the roof tank without climbing up. Choose wireless tank level meters with a Wi-Fi sensor or an indoor screen with RF sensor, a wall bracket and solar panel for the meter, plus smart irrigation: SONOFF Zigbee water valves, a smart valve controller, the SONOFF MS01 soil moisture sensor and a RainPoint automatic irrigation kit.

Tip: if roof Wi-Fi is weak, choose an RF model that sends readings to an indoor screen.