local SSID = "xxxxxxxxxxxxxxx"
local SSID_PASSWORD = "xxxxxxxxxxxxxxx"
local BUTTON_PIN = 1 -- GPIO5
local RASPBERRY_PI_URL = "http://192.168.1.80:8000/esp8266_trigger"


function wait_for_wifi_conn ( )
   tmr.alarm (1, 1000, 1, function ( )
      if wifi.sta.getip ( ) == nil then
         print ("Waiting for Wifi connection")
      else
         tmr.stop (1)
         print ("ESP8266 mode is: " .. wifi.getmode ( ))
         print ("The module MAC address is: " .. wifi.ap.getmac ( ))
         print ("Config done, IP is " .. wifi.sta.getip ( ))
      end
   end)
end

function transmit_msg()
    
end


-- Configure the ESP as a station (client)
wifi.setmode (wifi.STATION)
wifi.sta.config (SSID, SSID_PASSWORD)
wifi.sta.autoconnect (1)

-- Hang out until we get a wifi connection before the httpd server is started.
wait_for_wifi_conn ( )



do
    gpio.mode(BUTTON_PIN, gpio.INT, gpio.PULLUP)
    local function pin1cb(level, pulse)
        if level == 0 then
            -- send http request to Raspberry Pi
            local post_data = '{"ip": "'..wifi.sta.getip()..'"}'
            http.post(RASPBERRY_PI_URL, 
                'Content-Type: application/json\r\n',
                post_data,
                function(code, data)
                    if (code < 0) then
                        print("HTTP request failed")
                    else
                        print(code, data)
                    end
            end)
            -- sleep 1 sec
            --node.dsleep(1 * 1000000)
        end
    end
    gpio.trig(BUTTON_PIN, "both", pin1cb)
end