Water Tank Levels by WiFi on Your Phone

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When I moved to a rural property in Australia I was faced with the fact my water supply was at the mercy of the Gods; rain from the sky to fill the tanks.
I had a capacity of around 30,000 litres across 2 concrete tanks and checking the levels meant climbing up a ladder, lifting a very heavy concrete cover and peering down into the damp darkness to estimate the levels.
Not much fun, inaccurate and time consuming, there must be an easier way.
Using Blynk and my WLAN was the answer, I could see at a glance the levels on my phone.”

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