Ultrasonic water level meter to manage automatic irrigation systems with SONOFF and eWeLink

[morgan]

I have a similar solution. It monitors low water levels in the tank to shut off the water pump so it doesn’t run dry.

DIY Single-level single-function water sensor

A simple floating magnet and contactor($3.14) module connected via a two-wire 0.5mm cable to Sonoff DW2-RF (open version only). [w2] In DW2-RF, the contactor is desoldered… soldered wires, each wire in a separate thermoplastic sleeve with glue, the whole in an additional thermoplastic sleeve with glue. In DW2-RF, a hole is cut for the cable. [w1] The whole thing works on the principle that when the water level drops below a certain point, the sensor is opened and the DW2-RF sends a signal…

My second solution is based on two 05P units. One monitors low water levels to protect the pump, and the other monitors high water levels to prevent the tank from overflowing.

There are probably solutions on the market that measure water levels across the entire height of the tank, but nothing comes to mind right now, and they probably won’t be compatible with Sonoff/EweLink.

https://forum.ewelink.cc/t/sonoffs-alternative-to-autoaqua-smart-level-security/

Theoretically, the SONOFF Zigbee Smart Water Valve is supposed to have the ability to monitor how much water has flowed, but I don’t have it, so it’s hard for me to say.

SONOFF Zigbee Smart Water Valve