Minecraft-Computercraft-engineController

EngineController = {
    controllerCompID = 89,
    modem = nil,
    redstoneSide = "bottom",
}
function EngineController:findWirelessModem()
    for _, side in pairs(rs.getSides()) do
        if peripheral.getType(side) == "modem" then
            self.modem = rednet.open(side)
            return true
        end
    end

    return false
end
function EngineController:mainLoop()
    while true do
        event, param1, param2, param3 = os.pullEvent()
        if event == 'rednet_message' then
            if param1 == self.controllerCompID then
                if param2 == 'on' then
                    print("Turning on engines")
                    rs.setOutput(self.redstoneSide, true)
                elseif param2 == 'off' then
                    print("Turning off engines")
                    rs.setOutput(self.redstoneSide, false)
                else
                    if param2 then
                        print("Unknown message: " .. param2)
                    else
                        print("Received nil instead of message")
                    end
                end
            end
        end
    end
end

ec = EngineController
ec:findWirelessModem()
ec:mainLoop()