华为云物联网平台(IoT 设备接入云服务)提供海量设备的接入和管理能力,可以将自己的 IoT 设备 联接到华为云,支撑设备数据采集上云和云端下发命令给设备进行远程控制,配合华为云物联网平台的服 务实现设备与设备之间的控制,设备与物联网平台之间的数据信息交互。
在写代码之前先准备好华为云的环境。
注册华为云账号,这里就不介绍了,有手机就行,需要进行实名认证。
在控制台选择北京四,因为其他的可能需要企业才能使用,作为个人开发者就用北京四吧。
创建设备实例。
能看到设备实例的信息
我们要是用的接入方式-mqtt
通过接入地址查询IP。
记住这个IP地址。
创建新产品
注册设备
注意:生成好的设备 ID 和设备秘钥一定到妥善保管,只生成这一份。
创建产品模型
填写服务ID和服务类型
在此服务下"添加属性",用于上传开发板上的数据,以风扇为例,其他的传感器也是类似的方法。
创建了两个
在此服务下"添加命令",用于控制开发板上可以控制的设备,以风扇为例,其他的传感器也是类似的方法。
根据设备信息,生成用户名和密码
1.打开由华为云提供的生成用户名和密码的网址,进行生成
Huaweicloud IoTDA Mqtt ClientId Generator
2.填写生成好的设备ID和设备秘钥,点击按钮,生成用户名和密码
注意:下面的图片提供了方法。
这两个就是刚刚注册设备时候要求保存的,应该被保存在一个txt中了。
3.将生成好的信息(ClientD、Usemame、Password),修改文件"D:\DevEcoProjects\test\src\vendor\hqyj\fs_hi3861\demo\cloud_01_HuaWei_IoTDA\cloud_huawei_iotda_example.c",下面内容直接替换。
ip用刚刚查询的mqtt地址。
数据结构参考设备属性上报_设备接入 IoTDA (huaweicloud.com)
向云端设置属性的数据格式如下所示:
{
"services": [{
"service_id": "attribute",
"properties": {
"status": "ON",
"color": 60
}
}
]
}
代码编写
修改D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\BUILD.gn文件
# Copyright (c) 2023 Beijing HuaQing YuanJian Education Technology Co., Ltd
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import("//build/lite/config/component/lite_component.gni")
lite_component("demo") {
features = [
#"base_00_helloworld:base_helloworld_example",
#"base_01_led:base_led_example",
#"base_02_loopkey:base_loopkey_example",
#"base_03_irqkey:base_irqkey_example",
#"base_04_adc:base_adc_example",
#"base_05_pwm:base_pwm_example",
#"base_06_ssd1306:base_ssd1306_example",
#"kernel_01_task:kernel_task_example",
#"kernel_02_timer:kernel_timer_example",
#"kernel_03_event:kernel_event_example",
#"kernel_04_mutex:kernel_mutex_example",
#"kernel_05_semaphore_as_mutex:kernel_semaphore_as_mutex_example",
#"kernel_06_semaphore_for_sync:kernel_semaphore_for_sync_example",
#"kernel_07_semaphore_for_count:kernel_semaphore_for_count_example",
#"kernel_08_message_queue:kernel_message_queue_example",
#"wifi_09_hotspot:wifi_hotspot_example",
#"wifi_10_sta:wifi_sta_example",
#"tcp_11_server:tcp_server_example",
#"tcp_12_client:tcp_client_example",
#"udp_13_server:udp_server_example",
#"udp_14_client:udp_client_example",
#"network_15_mqtt:network_mqtt_example",
#"network_16_sntp:network_sntp_example",
#"network_17_httpd:network_httpd_example",
"cloud_18_HuaWei_IoTDA:cloud_huawei_iotda_example",
]
}
创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA文件夹
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA\BUILD.gn文件
# Copyright (c) 2023 Beijing HuaQing YuanJian Education Technology Co., Ltd
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
static_library("cloud_huawei_iotda_example") {
sources = [
"cloud_huawei_iotda_example.c",
"network_mqtt.c",
"wifi_connecter.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTConnectClient.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTConnectServer.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTDeserializePublish.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTFormat.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTPacket.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTSerializePublish.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTSubscribeClient.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTSubscribeServer.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTUnsubscribeServer.c",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src/MQTTUnsubscribeClient.c",
]
include_dirs = [
"//utils/native/lite/include",
"//kernel/liteos_m/kal/cmsis",
"//base/iot_hardware/peripheral/interfaces/kits",
"//foundation/communication/wifi_lite/interfaces/wifiservice",
"//third_party/paho.mqtt.embedded-c/MQTTPacket/src",
"//third_party/cJSON",
]
}
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA\wifi_connecter.h文件,该头文件包含wifi连接的宏。文件同network_16_sntp\wifi_connecter.h
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA\wifi_connecter.c文件,文件同network_16_sntp\wifi_connecter.c
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA\network_mqtt.h文件,文件同network_15_mqtt\network_mqtt.h文件,文件主要包含mqtt的函数。
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA\network_mqtt.c文件,文件同network_15_mqtt\network_mqtt.h文件,文件主要包含mqtt的函数实现。
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\cloud_18_HuaWei_IoTDA\cloud_huawei_iotda_example.c文件
/*
* Copyright (c) 2023 Beijing HuaQing YuanJian Education Technology Co., Ltd
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "cJSON.h"
#include "cmsis_os2.h"
#include "hi_gpio.h"
#include "hi_io.h"
#include "iot_errno.h"
#include "iot_gpio.h"
#include "iot_pwm.h"
#include "network_mqtt.h"
#include "ohos_init.h"
#include "wifi_connecter.h"
// 设备密码 fs12345678
// 设备ID
#define DEVICE_ID "668651baa559ef622666a845_hi3861"
// MQTT客户端ID
#define MQTT_CLIENT_ID "668651baa559ef622666a845_hi3861_0_0_2024070407"
// MQTT用户名
#define MQTT_USER_NAME "668651baa559ef622666a845_hi3861"
// MQTT密码
#define MQTT_PASS_WORD "d5b00ad95964f8016c9e6f79c8269265720d770acd7e97bf73cf30a339b04997"
// 华为云平台的IP地址
#define SERVER_IP_ADDR "117.78.5.125"
// 华为云平台的IP端口号
#define SERVER_IP_PORT 1883
// 订阅 接收控制命令的主题
#define MQTT_TOPIC_SUB_COMMANDS "$oc/devices/%s/sys/commands/#"
// 发布 成功接收到控制命令后的主题
#define MQTT_TOPIC_PUB_COMMANDS_REQ "$oc/devices/%s/sys/commands/response/request_id=%s"
#define MALLOC_MQTT_TOPIC_PUB_COMMANDS_REQ "$oc/devices//sys/commands/response/request_id="
// 发布 设备属性数据的主题
#define MQTT_TOPIC_PUB_PROPERTIES "$oc/devices/%s/sys/properties/report"
#define MALLOC_MQTT_TOPIC_PUB_PROPERTIES "$oc/devices//sys/properties/report"
#define TASK_STACK_SIZE (1024 * 10)
#define MsgQueueObjectNumber 16 // 定义消息队列对象的个数
typedef struct message_sensorData {
uint8_t status; // LED灯当前的状态
uint8_t color; // 颜色值
} msg_sensorData_t;
msg_sensorData_t sensorData = {0}; // 传感器的数据
osThreadId_t mqtt_send_task_id; // mqtt 发布数据任务ID
osThreadId_t mqtt_recv_task_id; // mqtt 接收数据任务ID
osThreadId_t key_detection_task_id; // 按键检测任务ID
#define MQTT_SEND_TASK_TIME 10 // s
#define MQTT_RECV_TASK_TIME 1 // s
#define TASK_INIT_TIME 2 // s
#define DISPLAY_BUFF_MAX 64
#define MQTT_DATA_MAX 256
#define RED_LED_PIN_NAME HI_IO_NAME_GPIO_10
#define RED_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_10_GPIO
#define GREEN_LED_PIN_NAME HI_IO_NAME_GPIO_2
#define GREEN_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_2_GPIO
#define BLUE_LED_PIN_NAME HI_IO_NAME_GPIO_7
#define BLUE_LED_PIN_FUNCTION WIFI_IOT_IO_FUNC_GPIO_7_GPIO
#define PWM0_PORT_NUM (0)
#define PWM1_PORT_NUM (1)
#define PWM2_PORT_NUM (2)
#define PWM_FREQ_DIVITION 64000
#define KEY1 HI_IO_NAME_GPIO_6 // 对应按键key1
#define KEY2 HI_IO_NAME_GPIO_5 // 对应按键key2
#define TASK_DELAY_TIME (200 * 1000)
static int g_netId = -1;
uint8_t publish_topic[MQTT_DATA_MAX] = {0};
uint8_t mqtt_data[MQTT_DATA_MAX] = {0};
unsigned short duty0 = 0, duty1 = 0, duty2 = 0; // pwm占空比记录变量
hi_gpio_value val1, val1_last, val2, val2_last; // GPIO的状态值
/**
* @brief 灯光开关
*/
void led_switch(uint8_t status)
{
if (status == 1) {
if (duty0 == 0) duty0 = 100;
if (duty1 == 0) duty1 = 100;
if (duty2 == 0) duty2 = 100;
IoTPwmStart(PWM0_PORT_NUM, duty0, PWM_FREQ_DIVITION);
IoTPwmStart(PWM1_PORT_NUM, duty1, PWM_FREQ_DIVITION);
IoTPwmStart(PWM2_PORT_NUM, duty2, PWM_FREQ_DIVITION);
} else {
IoTPwmStart(PWM0_PORT_NUM, 0, PWM_FREQ_DIVITION);
IoTPwmStart(PWM1_PORT_NUM, 0, PWM_FREQ_DIVITION);
IoTPwmStart(PWM2_PORT_NUM, 0, PWM_FREQ_DIVITION);
}
}
/**
* @brief 设置灯光颜色
*/
void led_color(uint8_t r, uint8_t g, uint8_t b)
{
printf("led_color: %d %d %d\r\n", r, g, b);
IoTPwmStart(PWM0_PORT_NUM, b, PWM_FREQ_DIVITION);
IoTPwmStart(PWM1_PORT_NUM, r, PWM_FREQ_DIVITION);
IoTPwmStart(PWM2_PORT_NUM, g, PWM_FREQ_DIVITION);
}
/**
* @brief 组JSON数据
*/
int Packaged_json_data(void)
{
cJSON *root = NULL, *array = NULL, *services = NULL;
cJSON *properties = NULL;
int ret = 0;
// 组JSON数据
root = cJSON_CreateObject(); // 创建一个对象
services = cJSON_CreateArray();
cJSON_AddItemToObject(root, "services", services);
array = cJSON_CreateObject();
cJSON_AddStringToObject(array, "service_id", "attribute");
properties = cJSON_CreateObject();
cJSON_AddItemToObject(array, "properties", properties);
cJSON_AddStringToObject(properties, "status", sensorData.status ? "ON" : "OFF");
cJSON_AddNumberToObject(properties, "color", (int)sensorData.color);
cJSON_AddItemToArray(services, array); // 将对象添加到数组中
/* 格式化打印创建的带数组的JSON对象 */
char *str_print = cJSON_PrintUnformatted(root);
if (str_print != NULL) {
// printf("%s\n", str_print);
if (strcpy_s(mqtt_data, strlen(str_print) + 1, str_print) == 0) {
ret = 0;
} else {
ret = -1;
}
cJSON_free(str_print);
} else {
ret = -1;
}
if (root != NULL) {
cJSON_Delete(root);
} else {
ret = -1;
}
properties = str_print = root = array = services = NULL;
return ret;
}
/**
* @brief MQTT 上报消息
*/
void mqtt_client_pub(void)
{
// 组Topic
memset_s(publish_topic, MQTT_DATA_MAX, 0, MQTT_DATA_MAX);
if (sprintf_s(publish_topic, MQTT_DATA_MAX, MQTT_TOPIC_PUB_PROPERTIES, DEVICE_ID) > 0) {
// 组JSON数据
Packaged_json_data();
// 发布消息
MQTTClient_pub(publish_topic, mqtt_data, strlen((char *)mqtt_data));
}
}
/**
* @brief MQTT 周期发布消息任务
*/
void mqtt_send_task(void)
{
while (1) {
mqtt_client_pub();
sleep(MQTT_SEND_TASK_TIME);
}
}
int get_jsonData_value(const cJSON *const object, uint8_t *value)
{
cJSON *json_value = NULL;
int ret = -1;
json_value = cJSON_GetObjectItem(object, "value");
if (json_value) {
if (!strcmp(json_value->valuestring, "ON")) {
*value = 1;
json_value = NULL;
ret = 0; // 0为成功
} else if (!strcmp(json_value->valuestring, "OFF")) {
*value = 0;
json_value = NULL;
ret = 0;
}
}
json_value = NULL;
return ret; // -1为失败
}
/**
* @brief 解析JSON数据
*/
int Parsing_json_data(const char *payload)
{
cJSON *root = NULL, *command_name = NULL, *paras = NULL, *value = NULL;
cJSON *red = NULL, *green = NULL, *blue = NULL;
int ret_code = 1;
root = cJSON_Parse((const char *)payload);
if (root) {
// 解析JSON数据
command_name = cJSON_GetObjectItem(root, "command_name");
paras = cJSON_GetObjectItem(root, "paras");
if (command_name) {
if (!strcmp(command_name->valuestring, "led")) {
ret_code = get_jsonData_value(paras, &sensorData.status);
// 操作硬件
led_switch(sensorData.status);
} else if (!strcmp(command_name->valuestring, "RGB")) {
red = cJSON_GetObjectItem(paras, "red");
green = cJSON_GetObjectItem(paras, "green");
blue = cJSON_GetObjectItem(paras, "blue");
led_color(red->valueint, green->valueint, blue->valueint);
ret_code = 0; // 0为成功
}
}
}
cJSON_Delete(root);
root = command_name = paras = value = red = green = blue = NULL;
return ret_code;
}
// 向云端发送返回值
void send_cloud_request_code(const char *request_id, int ret_code, int request_len)
{
char *request_topic =
(char *)malloc(strlen(MALLOC_MQTT_TOPIC_PUB_COMMANDS_REQ) + strlen(DEVICE_ID) + request_len + 1);
if (request_topic != NULL) {
memset_s(request_topic, strlen(DEVICE_ID) + strlen(MALLOC_MQTT_TOPIC_PUB_COMMANDS_REQ) + request_len + 1, 0,
strlen(DEVICE_ID) + strlen(MALLOC_MQTT_TOPIC_PUB_COMMANDS_REQ) + request_len + 1);
if (sprintf_s(request_topic, strlen(DEVICE_ID) + strlen(MALLOC_MQTT_TOPIC_PUB_COMMANDS_REQ) + request_len + 1,
MQTT_TOPIC_PUB_COMMANDS_REQ, DEVICE_ID, request_id) > 0) {
if (ret_code == 0) {
MQTTClient_pub(request_topic, "{\"result_code\":0}", strlen("{\"result_code\":0}"));
} else if (ret_code == 1) {
MQTTClient_pub(request_topic, "{\"result_code\":1}", strlen("{\"result_code\":1}"));
}
}
free(request_topic);
request_topic = NULL;
}
}
/**
* @brief MQTT接收数据的回调函数
*/
int8_t mqttClient_sub_callback(unsigned char *topic, unsigned char *payload)
{
if ((topic == NULL) || (payload == NULL)) {
return -1;
} else {
printf("topic: %s\r\n", topic);
printf("payload: %s\r\n", payload);
// 提取出topic中的request_id
char request_id[50] = {0};
int ret_code = 1; // 1为失败
if (0 == strcpy_s(request_id, sizeof(request_id),
topic + strlen(DEVICE_ID) + strlen("$oc/devices//sys/commands/request_id="))) {
printf("request_id: %s\r\n", request_id);
// 解析JSON数据
ret_code = Parsing_json_data(payload);
send_cloud_request_code(request_id, ret_code, sizeof(request_id));
}
}
return 0;
}
/**
* @brief MQTT 接收消息任务
*/
void mqtt_recv_task(void)
{
while (1) {
MQTTClient_sub();
sleep(MQTT_RECV_TASK_TIME);
}
}
/**
* @brief 按键检测任务
*/
void key_detection_task(void)
{
while (1) {
hi_gpio_get_input_val(KEY1, &val1); // 获取GPIO引脚的状态
if (val1 != val1_last) {
// 当GPIO状态改变的时候, 打印输出
printf("key1Value: %s\r\n", val1 ? "HI_GPIO_VALUE_1" : "HI_GPIO_VALUE_0");
val1_last = val1;
if (!val1_last) { // 按键被按下
if (sensorData.status) {
sensorData.status = 0;
led_switch(sensorData.status);
mqtt_client_pub();
} else {
sensorData.status = 1;
led_switch(sensorData.status);
mqtt_client_pub();
}
}
printf("key1Value: end\r\n");
}
hi_gpio_get_input_val(KEY2, &val2); // 获取GPIO引脚的状态
if (val2 != val2_last) {
// 当GPIO状态改变的时候, 打印输出
printf("key2Value: %s\r\n", val2 ? "HI_GPIO_VALUE_1" : "HI_GPIO_VALUE_0");
val2_last = val2;
}
// 200ms一检测
usleep(TASK_DELAY_TIME); // 200ms sleep
}
}
static void network_wifi_mqtt_example(void)
{
// 外设的初始化
// 灯光pwm初始化
hi_io_set_func(RED_LED_PIN_NAME, HI_IO_FUNC_GPIO_10_PWM1_OUT);
hi_io_set_func(GREEN_LED_PIN_NAME, HI_IO_FUNC_GPIO_2_PWM2_OUT);
hi_io_set_func(BLUE_LED_PIN_NAME, HI_IO_FUNC_GPIO_7_PWM0_OUT);
IoTPwmInit(PWM0_PORT_NUM);
IoTPwmInit(PWM1_PORT_NUM);
IoTPwmInit(PWM2_PORT_NUM);
// 按键初始化
hi_gpio_init(); // GPIO初始化
hi_io_set_pull(KEY1, HI_IO_PULL_UP); // 设置GPIO上拉
hi_io_set_func(KEY1, HI_IO_FUNC_GPIO_6_GPIO); // 设置IO16为GPIO功能
hi_gpio_set_dir(KEY1, HI_GPIO_DIR_IN); // 设置GPIO为输入模式
hi_io_set_pull(KEY2, HI_IO_PULL_UP); // 设置GPIO上拉
hi_io_set_func(KEY2, HI_IO_FUNC_GPIO_5_GPIO); // 设置IO15为GPIO功能
hi_gpio_set_dir(KEY2, HI_GPIO_DIR_IN); // 设置GPIO为输入模式
p_MQTTClient_sub_callback = &mqttClient_sub_callback;
// 连接WiFi
WifiDeviceConfig config = {0};
// 准备AP的配置参数
// strcpy(config.ssid, PARAM_HOTSPOT_SSID);
// strcpy(config.preSharedKey, PARAM_HOTSPOT_PSK);
strcpy_s(config.ssid, WIFI_MAX_SSID_LEN, PARAM_HOTSPOT_SSID);
strcpy_s(config.preSharedKey, WIFI_MAX_KEY_LEN, PARAM_HOTSPOT_PSK);
config.securityType = PARAM_HOTSPOT_TYPE;
g_netId = ConnectToHotspot(&config);
printf("netId = %d\r\n", g_netId);
sleep(TASK_INIT_TIME);
// 连接MQTT服务器
if (MQTTClient_connectServer(SERVER_IP_ADDR, SERVER_IP_PORT) != WIFI_SUCCESS) {
printf("[error] mqttClient_connectServer\r\n");
}
sleep(TASK_INIT_TIME);
// 初始化MQTT客户端
if (MQTTClient_init(MQTT_CLIENT_ID, MQTT_USER_NAME, MQTT_PASS_WORD) != WIFI_SUCCESS) {
printf("[error] mqttClient_init\r\n");
}
sleep(TASK_INIT_TIME);
// 订阅主题
if (MQTTClient_subscribe(MQTT_TOPIC_SUB_COMMANDS) != WIFI_SUCCESS) {
printf("[error] mqttClient_subscribe\r\n");
}
sleep(TASK_INIT_TIME);
mqtt_client_pub(); // 连接后上报一次消息
// 创建线程
osThreadAttr_t options;
options.name = "mqtt_send_task";
options.attr_bits = 0;
options.cb_mem = NULL;
options.cb_size = 0;
options.stack_mem = NULL;
options.stack_size = TASK_STACK_SIZE;
options.priority = osPriorityNormal;
mqtt_send_task_id = osThreadNew((osThreadFunc_t)mqtt_send_task, NULL, &options);
if (mqtt_send_task_id != NULL) {
printf("ID = %d, Create mqtt_send_task_id is OK!\r\n", mqtt_send_task_id);
}
options.name = "mqtt_recv_task";
options.stack_size = TASK_STACK_SIZE;
mqtt_recv_task_id = osThreadNew((osThreadFunc_t)mqtt_recv_task, NULL, &options);
if (mqtt_recv_task_id != NULL) {
printf("ID = %d, Create mqtt_recv_task_id is OK!\r\n", mqtt_recv_task_id);
}
options.name = "key_detection_task";
options.stack_size = TASK_STACK_SIZE;
key_detection_task_id = osThreadNew((osThreadFunc_t)key_detection_task, NULL, &options);
if (key_detection_task_id != NULL) {
printf("ID = %d, Create key_detection_task is OK!\r\n", key_detection_task_id);
}
}
SYS_RUN(network_wifi_mqtt_example);
其中有三个任务,分别是mqtt的周期上报,模拟温度计类的需要定时上报的功能,mqtt接收任务,用来处理服务器下发的控制命令,还有一个任务用来检测按键,当key1按下时切换灯的开关。
使用build,编译成功后,使用upload进行烧录。
这是可以从设备信息中看到设备在线,并且能看到设备上报的状态。
通过服务器下发设备控制命令,举例控制设备灯开关。
设备收到服务器发来的数据。
同时服务器也会更新设备上报的状态。