Our humble beginnings started in our backyard. One day, the pool water level was low and needed refilling. The rainwater tank had some water in it but was it enough? It was a frequent question that was only answered by guesses. Upon deciding that there was a need for a water tank sensor, an online search ensued, only to be disappointed with the one Bluetooth water tank sensor available. It was difficult to install and was not as efficient as it claimed to be. It was frustrating indeed.