This thread will discuss using pibeacon as a sprinkler valve controller.
The description will grow over time
The functionality will cover:
1. drive sprinkler relays to switch valves on/off (4...16 valves), using regular indigo actions
2. add some sensor, moisture, temp, humidity .. if you like
3. how to attach a display and show the sprinkler settings and stats and actions
4. add (touch) switches for sprinkler functions, eg start, stop, next zone.
costs:
1. RPI $35
2. box $10
3. display $ 30
4. 24v AC to 5V BUK $5
5. Some cables, connectors for valves , ethernet plug .. $5-10
you likely can get a cheaper one, but doing this .. you did it yourself -- . and it can serve as a regular pibeacon BLE RPI detecting BLE devices (iPhones, and ibeacons)
Karl