ESP8266 Community Forum

- Tue Dec 13, 2016 9:54 pm #59482 Hi,
I just started using nodemcu with lua. As a starter I am trying to make a simple wifi controlled Relay with Nodemcu as a UDP server. The problem is, after running for several hours, I cant make connection to the board. I tried ping ing the board using CMD ping command but got no response. If I restart the board, it works again.. Any ideas why? Thanks

Here is my Lua script:

Code: Select allpin_relay = 1
port = 1310
state = 0
gpio.mode(pin_relay, gpio.OUTPUT)
gpio.write(pin_relay, gpio.HIGH)

wifi.setmode(wifi.STATION)
wifi.sta.config("SSID", "password")
wifi.sta.connect()
wifi.sta.setip({ip="192.168.1.200",netmask="255.255.255.0",gateway="192.168.1.1"})
print("ESP8266 mode is: " .. wifi.getmode())
print("The module MAC address is: " .. wifi.ap.getmac())
print("Config done, IP is "..wifi.sta.getip())

srv=net.createServer(net.UDP)
srv:on("receive", function(srv, pl)
   if pl=="switch" then
    if state == 0 then
        gpio.write(pin_relay,gpio.LOW)
        state = 1
    elseif state == 1 then
        gpio.write(pin_relay,gpio.HIGH)
        state = 0
    end
   end
end)
srv:listen(port)