- Sun Mar 22, 2015 11:27 am
#12429
I've modified your code for more consistency and fixed a few typos.
Here is the MQTT temperature and humidity :
And the MQTT button
Use them as you want.
rutierut wrote:Added support for humidity & removed a useless part of example 1
I've modified your code for more consistency and fixed a few typos.
Here is the MQTT temperature and humidity :
Code: Select all
-- Engineered by MikeV, modded by rutierut
broker = "10.0.1.32" -- IP or hostname of MQTT broker
mqttPort = 1883 -- MQTT port (default 1883)
userID = "" -- username for authentication if required
userPWD = "" -- user password if needed for security
clientID = "ESP1" -- Device ID
GPIO2 = 4 -- IO Index of GPIO2 which is connected to an LED
count = 0 -- Test number of mqtt_do cycles
mqttState = 0 -- State control
-- Wifi credentials
SSID = ""
wifiPWD = ""
function wifi_connect()
wifi.setmode(wifi.STATION)
wifi.sta.config(SSID,wifiPWD)
wifi.sta.connect()
end
function read_dht()
dht22 = require("dht22")
dht22.read(GPIO2)
if dht22 == nil then
print("Error reading from DHT22")
temp = -256 --Prevent division by zero or nil error, while being out of real possible values.
humidity = -256
else
temp = round(dht22.getTemperature()/10, 2)
humidity = round(dht22.getHumidity()/10, 2)
end
dht22 = nil
package.loaded["dht22"]=nil
end
function mqtt_do()
count = count + 1 -- For testing number of interations before failure
if mqttState < 5 then
mqttState = wifi.sta.status() --State: Waiting for wifi
wifi_connect()
elseif mqttState == 5 then
m = mqtt.Client(clientID, 120, userID, userPWD)
m:connect( broker , mqttport, 0,
function(conn)
print("Connected to MQTT:" .. broker .. ":" .. mqttport .." as " .. clientID )
mqttState = 20 -- Go to publish state
end)
elseif mqttState == 20 then
mqttState = 25 -- Publishing...
read_dht() -- Getting values
m:publish("Testtopic","Temperature: "..temp.." C, Humidity: "..humidity.."%", 0, 0,
function(conn)
-- Print confirmation of data published
print(" Sent messeage #:"..count.."Temp:"..temp.."Humidity: "..humidity.."% published!")
mqttState = 20 -- Finished publishing - go back to publish state.
end)
else print("Publishing..."..mqttState)
mqttState = mqttState - 1 -- takes us gradually back to publish state to retry
end
end
function round(val, decimal) -- Avoid temperature like 21.000000001243
if (decimal) then
return math.floor( (val * 10^decimal) + 0.5) / (10^decimal)
else
return math.floor(val+0.5)
end
end
tmr.alarm(0, 10000, 1, function() mqtt_do() end)And the MQTT button
Code: Select all
-- Engineered by rutierut, inspired by MikeV
broker = "10.0.1.32" -- IP or hostname of MQTT broker
mqttPort = 1883 -- MQTT port (default 1883)
userID = "" -- username for authentication if required
userPWD = "" -- user password if needed for security
clientID = "ESP1" -- Device ID
GPIO2 = 4 -- IO Index of GPIO2 which is connected to an LED
ready = 0
previousButtonPress = 0
gpio.mode(GPIO2, gpio.INPUT)
-- Wifi credentials
SSID = ""
wifiPWD = ""
function wifi_connect()
wifi.setmode(wifi.STATION)
wifi.sta.config(SSID,wifiPWD)
wifi.sta.connect()
ip = wifi.sta.getip()
if ip ~= nil then
print('Connected, ip is:' .. ip)
tmr.stop(1)
ready = 1
else
ready = 0
end
end
function mqtt_do()
if ready == 1 then
m = mqtt.Client(clientID, 120, userID, userPWD)
m:connect( broker , mqttport, 0,
function(conn)
print("Connected to MQTT:" .. broker .. ":" .. mqttPort .." as " .. clientID )
tmr.stop(0)
connected = 1;
end)
end
end
function button_pressed()
currentime = tmr.now()
delta = currentime - previousButtonPress
previousbuttonpress = tmr.now()
if delta >= 200000 then
print('Button pressed')
publishing = 1;
m:publish("Frontdoor","Button Pressed", 0, 0,
function(conn)
-- Print confirmation of data published
print(" Message published!")
publishing = 0;
-- Finished publishing - go back to publish state.
end)
elseif delta <= 200000 then
print('Delta was too small')
else
print('error')
end
end
gpio.trig(GPIO2, "down", button_pressed)
tmr.alarm(0, 1000, 1, function()
mqtt_do()
tmr.delay(1000)
end)
tmr.alarm(1, 1111, 1, function()
wifi_connect()
end)Use them as you want.
