LuatOS/demo/mqtt/main.lua

-- LuaTools需要PROJECT和VERSION这两个信息
PROJECT = "mqttdemo"
VERSION = "1.0.0"

--[[
本demo需要mqtt库, 大部分能联网的设备都具有这个库
mqtt也是内置库, 无需require
]]

-- sys库是标配
_G.sys = require("sys")
--[[特别注意, 使用mqtt库需要下列语句]]
_G.sysplus = require("sysplus")

-- 自动低功耗, 轻休眠模式
-- Air780E支持uart唤醒和网络数据下发唤醒, 但需要断开USB,或者pm.power(pm.USB, false) 但这样也看不到日志了
-- pm.request(pm.LIGHT)

--根据自己的服务器修改以下参数
local mqtt_host = "lbsmqtt.airm2m.com"
local mqtt_port = 1884
local mqtt_isssl = false
local client_id = "abc"
local user_name = "user"
local password = "password"

local pub_topic = "/luatos/pub/" .. (mcu.unique_id():toHex())
local sub_topic = "/luatos/sub/" .. (mcu.unique_id():toHex())
-- local topic2 = "/luatos/2"
-- local topic3 = "/luatos/3"

local mqttc = nil

sys.taskInit(function()
    -----------------------------
    -- 统一联网函数, 可自行删减
    ----------------------------
    if rtos.bsp():startsWith("ESP32") then
        -- wifi 联网, ESP32系列均支持
        local ssid = "uiot"
        local password = "12345678"
        log.info("wifi", ssid, password)
        -- TODO 改成esptouch配网
        -- LED = gpio.setup(12, 0, gpio.PULLUP)
        wlan.init()
        wlan.setMode(wlan.STATION)
        wlan.connect(ssid, password, 1)
        local result, data = sys.waitUntil("IP_READY", 30000)
        log.info("wlan", "IP_READY", result, data)
        device_id = wlan.getMac()
        pub_topic = "/luatos/pub/" .. (wlan.getMac():toHex())
        sub_topic = "/luatos/sub/" .. (wlan.getMac():toHex())
        client_id = wlan.getMac():toHex()
    elseif rtos.bsp() == "AIR105" then
        -- w5500 以太网, 当前仅Air105支持
        w5500.init(spi.HSPI_0, 24000000, pin.PC14, pin.PC01, pin.PC00)
        w5500.config() --默认是DHCP模式
        w5500.bind(socket.ETH0)
        -- LED = gpio.setup(62, 0, gpio.PULLUP)
        sys.wait(1000)
        pub_topic = "/luatos/pub/" .. (w5500.getMac():toHex())
        sub_topic = "/luatos/sub/" .. (w5500.getMac():toHex())
    elseif rtos.bsp() == "EC618" then
        -- Air780E/Air600E系列
        --mobile.simid(2) -- 自动切换SIM卡
        -- LED = gpio.setup(27, 0, gpio.PULLUP)
        device_id = mobile.imei()
        sys.waitUntil("IP_READY", 30000)
        pub_topic = "/luatos/pub/" .. (mobile.imei())
        sub_topic = "/luatos/sub/" .. (mobile.imei())
        client_id = mobile.imei()
    end

    -- 打印一下上报(pub)和下发(sub)的topic名称
    -- 上报: 设备 ---> 服务器
    -- 下发: 设备 <--- 服务器
    -- 可使用mqtt.x等客户端进行调试
    log.info("mqtt", "pub", pub_topic)
    log.info("mqtt", "sub", sub_topic)

    -- 打印一下支持的加密套件, 通常来说, 固件已包含常见的99%的加密套件
    -- if crypto.cipher_suites then
    --     log.info("cipher", "suites", json.encode(crypto.cipher_suites()))
    -- end

    -------------------------------------
    -------- MQTT 演示代码 --------------
    -------------------------------------

    mqttc = mqtt.create(nil,mqtt_host, mqtt_port, mqtt_isssl, ca_file)

    mqttc:auth(client_id,user_name,password) -- client_id必填,其余选填
    -- mqttc:keepalive(240) -- 默认值240s
    mqttc:autoreconn(true, 3000) -- 自动重连机制

    mqttc:on(function(mqtt_client, event, data, payload)
        -- 用户自定义代码
        log.info("mqtt", "event", event, mqtt_client, data, payload)
        if event == "conack" then
            sys.publish("mqtt_conack")
            mqtt_client:subscribe(sub_topic)--单主题订阅
            -- mqtt_client:subscribe({[topic1]=1,[topic2]=1,[topic3]=1})--多主题订阅
        elseif event == "recv" then
            log.info("mqtt", "downlink", "topic", data, "payload", payload)
            sys.publish("mqtt_payload", data, payload)
        elseif event == "sent" then
            log.info("mqtt", "sent", "pkgid", data)
        -- elseif event == "disconnect" then
            -- 非自动重连时,按需重启mqttc
            -- mqtt_client:connect()
        end
    end)

    mqttc:connect()
	sys.waitUntil("mqtt_conack")
    while true do
        -- mqttc自动处理重连
        local ret, topic, data, qos = sys.waitUntil("mqtt_pub", 300000)
        if ret then
            if topic == "close" then break end
            mqttc:publish(topic, data, qos)
        end
    end
    mqttc:close()
    mqttc = nil
end)

-- 这里演示在另一个task里上报数据, 会定时上报数据,不需要就注释掉
sys.taskInit(function()
	local data = "123,"
	local qos = 1 -- QOS0不带puback, QOS1是带puback的
    while true do
        sys.wait(60000)
        if mqttc and mqttc:ready() then
            local pkgid = mqttc:publish(pub_topic, data .. os.date(), qos)
            -- local pkgid = mqttc:publish(topic2, data, qos)
            -- local pkgid = mqttc:publish(topic3, data, qos)
        end
    end
end)

-- 以下是演示与uart结合, 简单的mqtt-uart透传实现,不需要就注释掉
local uart_id = 1
uart.setup(uart_id, 9600)
uart.on(uart_id, "receive", function(id, len)
    local data = ""
    while 1 do
        local tmp = uart.read(uart_id)
        if not tmp or #tmp == 0 then
            break
        end
        data = data .. tmp
    end
    log.info("uart", "uart收到数据长度", #data)
    sys.publish("mqtt_pub", pub_topic, data)
end)
sys.subscribe("mqtt_payload", function(topic, payload)
    log.info("uart", "uart发送数据长度", #payload)
    uart.write(1, payload)
end)


-- 用户代码已结束---------------------------------------------
-- 结尾总是这一句
sys.run()
-- sys.run()之后后面不要加任何语句!!!!!