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@ -1,24 +1,76 @@
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DHT = require("dht_lib")
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dht_data = 2
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buzzer = 1
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gpio.mode(buzzer, gpio.OUTPUT)
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trig = 5 --IO14
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echo = 7 --IO13
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relay = 0 --IO16
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is_relay_on = false
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pulse_time = 0
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water_level = 0
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relay_on = 10
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relay_off = 100
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tank_height = 120
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client_connected = false
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m = mqtt.Client("ESP8266-" .. node.chipid(), 120, "${DEVICE_TOKEN}", "")
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tmr.alarm(0, 10000, 1, function()
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DHT.read(dht_data)
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function save_config()
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file.open("config", "w+")
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file.writeline(relay_on .. "," .. relay_off .. "," .. tank_height)
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file.close()
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print("Configs saved")
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end
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function read_config()
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if (file.open("config") ~= nil) then
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local result = string.sub(file.readline(), 1, -2) -- to remove newline character
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file.close()
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local v1, v2, v3 = result:match("([^,]+),([^,]+)")
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relay_on = tonumber(v1)
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relay_off = tonumber(v2)
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tank_height = tonumber(v3)
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print("Loaded configs:" .. relay_on .. "," .. relay_off .. "," .. tank_height)
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else
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print("Using default configs")
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end
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end
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gpio.mode(relay, gpio.OUTPUT)
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gpio.mode(trig, gpio.OUTPUT)
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gpio.mode(echo, gpio.INT)
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read_config()
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gpio.trig(echo, "both", function(level)
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local du = tmr.now() - pulse_time
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if (level == 1) then
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pulse_time = tmr.now()
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else
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-- 1cm ==> 40
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water_level = tank_height - (du / 40);
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if (water_level < relay_on) then
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gpio.write(relay, gpio.HIGH)
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is_relay_on = true
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elseif (water_level > relay_off) then
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gpio.write(relay, gpio.LOW)
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is_relay_on = false
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end
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print("Water Level: " .. water_level .. " cm")
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collectgarbage()
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end
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end)
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local t = DHT.getTemperature()
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local h = DHT.getHumidity()
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tmr.alarm(0, 5000, 1, function()
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gpio.write(trig, gpio.HIGH)
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tmr.delay(10)
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gpio.write(trig, gpio.LOW)
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end)
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tmr.alarm(0, 10000, 1, function()
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if t == nil then
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print("Error reading from DHTxx")
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else
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if (client_connected) then
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local payload = "{event:{metaData:{owner:\"${DEVICE_OWNER}\",deviceId:\"${DEVICE_ID}\"},payloadData:{temperature:" .. t .. ", humidity:" .. h .. "}}}"
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local payload = "{event:{metaData:{owner:\"${DEVICE_OWNER}\",deviceId:\"${DEVICE_ID}\"},payloadData:{relay:" .. is_relay_on .. ", waterlevel:" .. water_level .. "}}}"
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m:publish("carbon.super/watertank/${DEVICE_ID}/data", payload, 0, 0, function(client)
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print("Published> Temperature: " .. t .. "C Humidity: " .. h .. "%")
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print("Published> Water Level: " .. water_level .. "cm Relay: " .. is_relay_on .. "%")
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end)
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else
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connectMQTTClient()
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@ -39,7 +91,6 @@ function connectMQTTClient()
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subscribeToMQTTQueue()
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end)
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end
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end
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function subscribeToMQTTQueue()
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@ -49,28 +100,15 @@ end)
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m: on("message", function(client, topic, message)
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print("MQTT message received")
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print(message)
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buzz(message == "on")
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local v1, v2, v3 = message: match("([^,]+),([^,]+)")
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relay_on = tonumber(v1)
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relay_off = tonumber(v2)
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tank_height = tonumber(v3)
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print("Received configs:".. relay_on.. ",".. relay_off.. ",".. tank_height)
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save_config();
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end)
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m: on("offline", function(client)
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print("Disconnected")
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client_connected = false
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end)
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end
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function buzz(status)
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local buzzerOn = true
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if(status) then
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tmr. alarm(1, 500, 1, function()
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if buzzerOn then
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buzzerOn = false
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gpio. write(buzzer, gpio. HIGH)
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else
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buzzerOn = true
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gpio. write(buzzer, gpio. LOW)
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end
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end)
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else
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tmr. stop(1)
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gpio. write(buzzer, gpio. LOW)
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end
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end
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charitha
8 years ago