OpenSprinkler Integration with SHAC

I am playing with a Pi-Zero running OsPi (Open Sprinkler) as test for a cheap irrigation controller that has a decent integration with Weather Underground and automatic rain delays, technical operating based on climatic conditions etc..

You can set the zones in OS to send an HTTP command. So I wrote a very basic (no real error handling) server that runs on the SHAC to accept commands from the OS and operate the Group Address associated with my irrigation zones.

It may not be something I would do professionally, I am just playing around home while its raining outside but it may be of use to someone else.

Example zone setup in OpenSprinkler


example code in the SHAC as a resident script with 0 sec interval:

Code:

local socket = require("socket")
-- create a TCP socket and bind it to the local host, at port 9001
local server = assert(socket.bind("*", 9001))
-- loop forever waiting for clients
while 1 do
  -- wait for a connection from any client
  local client = server:accept()
  -- make sure we don't block waiting for this client's line
  client:settimeout(3)
  -- receive the line
  local line, err = client:receive()
  -- if there was no error, and it received something decode it and act on it.
  if not err and line ~="" then
    --Get zone number from command
    local ZoneNum = tonumber(line:sub(6,7))
    --Get zone state from command
    local ZoneState = toboolean(tonumber(line:sub(8,8)))
    --In application 113, set ZoneNum to ZoneState
      SetCBusState(0, 113, ZoneNum, ZoneState)
    --log instruction for debugging.
    log("Zone: ".. ZoneNum.. " was set to ".. tostring(ZoneState))
  end
  --Sleep
  socket.sleep(1)
end