farm_controller

local my_name = "farm"
local modem_pos = "left"
local protocol = "farm_control"
local redstone_pos = "top"

redstone.setAnalogOutput(redstone_pos, 0)
rednet.open(modem_pos)
rednet.host(protocol, my_name)
while true do
    local id, message = rednet.receive(protocol)
    if message == "off" then
        redstone.setAnalogOutput(redstone_pos, 15)
        print("Farm shut down by " .. id)
    elseif message == "on" then
        redstone.setAnalogOutput(redstone_pos, 0)
        print("Farm started by " .. id)
    else
        print("Message was not recognized " .. message .. " " .. id)
    end
end