wifi.setmode(wifi.STATION)
wifi_conf = { ssid = "coco", pwd = "lzf1997811", auto = true }
wifi.sta.config(wifi_conf)

wifi.sta.connect()

t = tmr.create()
t:register(500, tmr.ALARM_AUTO, function()
    if wifi.sta.getip() ~= nil then
        ip = wifi.sta.getip()
        print("ip is -->", ip)
        t:unregister()
        Init_mqtt()
    else
        print("-----getting ip----")
    end
end)

t:start()

s = softuart.setup(9600, 5, 6)
n = softuart.setup(9600, 8, 7)

s:on("data", '\r', function(data)
    print("receive data:", data)

    a, b = string.match(data, "(%d+),(%d+)")
    a = tonumber(a)
    b = tonumber(b)

    local str_beep_on = "beep:on"
    local str_beep_off = "beep:off"

    if b > 80 then
        n:write(str_beep_on)
        print("beep:on")
    else
        n:write(str_beep_off)
        print("beep:off")
    end

    mqtt_client:publish("ctos", data, 0, 120, function(client)
        print("dht_data:success!");
    end)
end)

function Init_mqtt()
    mqtt_client = mqtt.Client("stm32_fan_client", 60);

    mqtt_client:on("message", function(client, topic, message)
        if topic == 'stm32' then
            print("subed msg:" .. message)
            s:write(message)
        end
    end)
    mqtt_client:connect("flykhan.com", function(client)
        -- mqtt_client:connect("39.106.7.53", function(client)
        print("mqtt broker success")
        mqtt_client:subscribe("stm32", 0, function(client)
            print("subscribe ok")
        end)
    end, function(client, reason)
        print("mqtt broker fail:" .. reason)
    end)

    mqtt_client:close()
end