ESP-01 temp/humidity publishing

init.lua

if wifi.sta.status() ~= 5 then tmr.alarm(6, 10000,0, function(d) dofile('init.lua') end) return end
if wifi.sta.status() == 5 then dofile('pub.lua') return end

pub.lua

ID = 'ESP-'..node.chipid()
m = mqtt.Client(ID,90,'' ,'')

-- setup Last Will and Testament (optional)
m:lwt("status/"..ID, "offline", 0, 0)

m:on("connect", function(con) print ("connected") end)
m:on("offline", function(con) print ("offline") end)

-- on publish message receive event
m:on("message", function(conn, topic, data)
  print(topic .. ":" )
  if data ~= nil then
    print(data)
  end
end)


function readpub ()
  status,temp,humi,temp_decimial,humi_decimial = dht.read(4)
  if( status == dht.OK ) then
      jstr = '{ "temp": '..temp..', "humidity": '..humi..' }'
      -- print("DHT Temperature:"..temp..";".."Humidity:"..humi.."JSON:"..jstr)
      m:publish("sensors/"..ID.."/json",jstr,0,0, function(conn) print(jstr) end)
  elseif( status == dht.ERROR_CHECKSUM ) then
    print( "DHT Checksum error." );
  elseif( status == dht.ERROR_TIMEOUT ) then
    print( "DHT Time out." );
  end
end


m:connect("10.1.1.251", 1883, 0, function(conn) print("connected") end)

--  start timer to read temp/hum and publish
tmr.alarm(0,5000,1,readpub)