Look for a smart irrigation controller with a flow sensor
Adapt your garden to your climate, rather than your irrigation system to your expectations.

When a complicated system is failing due to its complication, it usually isn't the right solution to add more complication. Flow sensors, wifi transmitters, presumably embedded server software and a monitoring web page or smartphone app; this sounds very expensive and even more prone to failure with the addition of so many new technology domains.

"Honey, it's time to debug the sprinkler again!"

"Now where did I put gdb? It was here in /usr/bin the last time I saw it..."

Complicated irrigation systems are themselves the failure. True bliss lies in planting things that grow natively in the region and don't need to be intensively watered after they're established. Then you don't need an irrigation system at all! And you also don't need to spend ton of money (and the planet's resources) dumping potable water on plants that can't grow on rainfall alone.

I don't know where you live, but there are beautiful and useful plants that grow in any climate. I live in the high desert, where it freezes in the winter, gets up to 115f in the summer, and only rains 4-7 inches a year. It's a very challenging climate. Nonetheless, I plant what natively grows, and  even found species of grass that grow here without irrigation (Blue Grama grass, Curly Mesquite, Western Wheatgrass, siberian wheatgrass).