Functional garage_door_opener example.

http/garage_door_opener.lua

@@ -0,0 +1,30 @@
+-- garage_door_opener.lua
+-- Part of nodemcu-httpserver, example.
+-- Author: Marcos Kirsch
+
+local function pushTheButton(connection, pin)
+
+   -- Redirect the user back to the static page where the garage door opener buttons are.
+   connection:send("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\Cache-Control: private, no-store\r\n\r\n")
+   connection:send('<script type="text/javascript">window.location.replace("/garage_door_opener.html");</script>')
+
+   -- push the button!
+   -- Note that the relays connected to the garage door opener are wired
+   -- to close when the GPIO pin is low. This way they don't activate when
+   -- the chip is reset and the GPIO pins are in input mode.
+   gpio.write(pin, gpio.LOW)
+   gpio.mode(pin, gpio.OUTPUT)
+   gpio.write(pin, gpio.LOW)
+   tmr.delay(300000) -- in microseconds
+   gpio.write(pin, gpio.HIGH)
+   gpio.mode(pin, gpio.INPUT)
+
+end
+
+return function (connection, args)
+   print('Garage door button was pressed!')
+   print('Door', args.door)
+   if args.door == "1" then pushTheButton(connection, 3)             -- GPIO0
+   elseif args.door == "2" then pushTheButton(connection, 4)         -- GPIO2
+   else dofile("httpserver-error.lc")(connection, {code = 400}) end  -- Bad Request
+end