IoTT - Keep an eye on TT table from your desk

Arun Kumar Sundaramurthy

Problem Statement

How we approached the problem?

Use the lights in the play area
Detect sound while playing
Vibration of the ball hitting the table

Vibration Sensor

ESP 8266

NodeMCU

IoTT - Circuit Diagram

DEMO

source: https://github.com/nodemcu/nodemcu-firmware

Questions??

STATUS = 0

function vibrationDetector()
    local sensorPin = 4
    local counter = 0

    gpio.mode(sensorPin, gpio.INT)

    function debounce(fn)
        local last = 0
        local delay = 200000

        return function()
            local now = tmr.now()
            if now - last < delay then return end

            last = now
            return fn()
        end
    end

    function incCounter()
        counter = counter + 1
    end

    function updateStatus()
        if(counter > 3) then
            STATUS = 1
        else
            STATUS = 0
        end
        counter = 0
    end

    gpio.trig(sensorPin, "up", debounce(incCounter))
    tmr.alarm(0, 45000, 1, updateStatus)
end

vibrationDetector()

detector.lua

ip = wifi.sta.getip()
print('Present IP = ', ip)

wifi.setmode(wifi.STATION)
wifi.sta.config("ssid","password")
ip = wifi.sta.getip()

srv=net.createServer(net.TCP)
srv:listen(80,function(conn)
  conn:on("receive",function(conn,payload)
conn:send(STATUS)
  end)
  conn:on("sent",function(conn) conn:close() end)
end)

dofile("detector.lua")
dofile("server.lua")

server.lua

init.lua