little app to communicate between browser/app and microcontroller to run a small waterfall
We have two little ponds in the yard fed by the rainwater from the roof. They are at the base of a big outcropping of roxbury pudding stone. Water is pumped from the lower pond to the upper pond and from the upper pond up the side of the ledge.
There is an app, "cascada" that starts the pumps and energizes the circuits to turn on the waterfall and control the level of the lower pond.
If it hasn't rained in a while, over time water evaporates and leaks out. The level of the pond is controlled using a $10 lawn sprinkler valve to inject water into the pond when the falls below a certain level. Water gets added while the pumps are on until it reaches the max level then it goes off. If you turn on the pumps again it doesn't continue filling but waits to inject water til the water falls to the low water sensor.
The water level control is independent of the pond timer, is located in its own circuit box on the porch and is activated whenever the waterfall is on.
The other circuit is connected to the house ethernet and contains a server, relays and timers to turn the system on and off. Its microcontroller is connected to an Enc28j60 chip that implements a server capable of delivering GET string variables to the microcontroller.