Question

这是我的lua脚本，在带有nodemcu固件的esp8266上运行，我保留一个函数check_wifi（）来检查我的esp模块是否已连接，然后我正在发布主题＆＃34; on＆＃34; ，并为＆＃34; connect＆＃34;设置两个事件处理程序。和＃34; message＆＃34;，但是我的处理程序

  function check_wifi()
     local ip = wifi.sta.getip()
     if(ip==nil) then
       print("Connecting...")
     else
      tmr.stop(0)
      print("Connected to AP!")
      print(ip)

      m:connect("test.mosquitto.org", 1883, 0, function(conn) print("connected") end)
      m:publish("on","1",0,0,0)
      m:on("connect",function(m) 

        m:subscribe("on",0,function(m) print(m);print("subcribed") end)

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

    local SSID = "Crystalrock2"
    local SSID_PASSWORD = "nest2abc123"

    gpio.mode(4,gpio.OUTPUT)
    gpio.write(4,gpio.LOW)

    -- configure ESP as a station
    wifi.setmode(wifi.STATION)
    wifi.sta.config(SSID,SSID_PASSWORD)
    wifi.sta.connect()

    m = mqtt.Client("dee15", 120, "test", "password")

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

    m:on("connect",function(m) 

        m:subscribe("on",0,function(m) print(m);print("subcribed") end)

        end )
    m:connect("test.mosquitto.org", 1883, 0, function(conn) print("connected") end)


    tmr.alarm(0,2000,1,check_wifi)

这是我得到的：输出：连接... 连接... 连接到AP！ 192.168.0.100 userdata：3fff8678 订阅频道

为什么m：on（＆＃34; message＆＃34; ..）未触发并打印消息

无法从test.mosquitto.org

0 个答案: