add:添加华为云demo

demo/wlan/esp32c3/iotda/main.lua

@@ -0,0 +1,76 @@
+PROJECT = "gpiodemo"
+VERSION = "1.0.0"
+
+-- 一定要添加sys.lua !!!!
+local sys = require "sys"
+require("sysplus")
+log.info("main", "iotda demo")
+
+
+local device_id     = ""    --改为你自己的设备id
+local device_secret = ""    --改为你自己的设备密钥
+
+local mqttc = nil
+
+sys.taskInit(function()
+    log.info("wlan", "wlan_init:", wlan.init())
+    wlan.setMode(wlan.STATION)
+    wlan.connect("CMCC_EDU", "88995500", 1)
+    local result, data = sys.waitUntil("IP_READY")
+    log.info("wlan", "IP_READY", result, data)
+    
+    local client_id,user_name,password = iotauth.iotda(device_id,device_secret)
+    log.info("iotda",client_id,user_name,password)
+    
+    mqttc = mqtt.create(nil,"a16203e7a0.iot-mqtts.cn-north-4.myhuaweicloud.com", 1883)
+
+    mqttc:auth(client_id,user_name,password)
+    mqttc:keepalive(30) -- 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("/luatos/123456")
+        elseif event == "recv" then
+            log.info("mqtt", "downlink", "topic", data, "payload", payload)
+        elseif event == "sent" then
+            log.info("mqtt", "sent", "pkgid", data)
+        end
+    end)
+
+    mqttc:connect()
+    sys.wait(10000)
+    mqttc:subscribe("/luatos/123456")
+	sys.waitUntil("mqtt_conack")
+    while true do
+        -- mqttc自动处理重连
+        local ret, topic, data, qos = sys.waitUntil("mqtt_pub", 30000)
+        if ret then
+            if topic == "close" then break end
+            mqttc:publish(topic, data, qos)
+        end
+    end
+    mqttc:close()
+    mqttc = nil
+end)
+
+sys.taskInit(function()
+	local topic = "/luatos/123456"
+	local payload = "123"
+	local qos = 1
+    local result, data = sys.waitUntil("IP_READY")
+    while true do
+        sys.wait(5000)
+        if mqttc:ready() then
+            local pkgid = mqttc:publish(topic, payload, qos)
+        end
+    end
+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!!!!!