--Small demo of internet/network controlled relay using ESP8266 (ESP-01) module and 2 channel optoisolated relay board
--Made by Sandeep Vaidya @ Robokits India - http://www.robokits.co.in for demo.
--Configure relay ouutput pins, pins are floating and relay opto needs ground to be activated. So pins are kept high on startup.
Relay1 = 4
Relay2 = 3
gpio.mode(Relay1, gpio.OUTPUT)
gpio.write(Relay1, gpio.LOW);
gpio.mode(Relay2, gpio.OUTPUT)
gpio.write(Relay2, gpio.HIGH);
wifi.setmode(wifi.STATION) --Set network mode to station to connect it to wifi router. You can also set it to AP to make it a access point allowing connection from other wifi devices.
--Set a static ip so its easy to access
cfg = {
ip="192.168.0.24",
netmask="255.255.252.0",
gateway="192.168.0.1"
}
wifi.sta.setip(cfg)
--Your router wifi network's SSID and password
wifi.sta.config("XXXXXXX","XXXXXXX")
--Automatically connect to network after disconnection
wifi.sta.autoconnect(1)
print ("\r\n")
--Print network ip address on UART to confirm that network is connected
print(wifi.sta.getip())
--Create server and send html data, process request from html for relay on/off.
srv=net.createServer(net.TCP)
srv:listen(80,function(conn) --change port number if required. Provides flexibility when controlling through internet.
conn:on("receive", function(client,request)
local html_buffer = "";
local html_buffer1 = "";
local _, _, method, path, vars = string.find(request, "([A-Z]+) (.+)?(.+) HTTP");
if(method == nil)then
_, _, method, path = string.find(request, "([A-Z]+) (.+) HTTP");
end
local _GET = {}
if (vars ~= nil)then
for k, v in string.gmatch(vars, "(%w+)=(%w+)&*") do
_GET[k] = v
end
end
html_buffer = html_buffer.."";
html_buffer = html_buffer.."Robokits IOT Server
";
html_buffer = html_buffer.."
";
html_buffer = html_buffer.."OLVASÓLÁMPA
";
html_buffer1 = html_buffer1.."
";
html_buffer1 = html_buffer1.."
";
local _on,_off = "",""
if(_GET.pin == "ON1")then
gpio.write(Relay1, gpio.HIGH);
elseif(_GET.pin == "OFF1")then
gpio.write(Relay1, gpio.LOW);
elseif(_GET.pin == "ON2")then
gpio.write(Relay2, gpio.LOW);
elseif(_GET.pin == "OFF2")then
gpio.write(Relay2, gpio.HIGH);
end
--Buffer is sent in smaller chunks as due to limited memory ESP8266 cannot handle more than 1460 bytes of data.
client:send(html_buffer);
client:send(html_buffer1);
client:close();
collectgarbage();
end)
end)