通过阿里云的IOT平台控制ESP8266
#include <ESP8266WiFi.h>
/* 依赖 PubSubClient 2.4.0 */
#include <PubSubClient.h>
/* 依赖 ArduinoJson 5.13.4 */
#include <ArduinoJson.h>
#define SENSOR_PIN 13
/* 连接您的WIFI SSID和密码 */
#define WIFI_SSID "路由器SSID"
#define WIFI_PASSWD "密码"
/* 设备证书信息*/
#define PRODUCT_KEY "替换为设备的ProductKey"
#define DEVICE_NAME "替换为设备的DeviceName"
#define DEVICE_SECRET "替换为设备的DeviceSecret"
#define REGION_ID "替换为设备所在地域ID如cn-shanghai"
/* 线上环境域名和端口号，不需要改 */
#define MQTT_SERVER PRODUCT_KEY ".iot-as-mqtt." REGION_ID ".aliyuncs.com"
#define MQTT_PORT 1883
#define MQTT_USRNAME DEVICE_NAME "&" PRODUCT_KEY
#define CLIENT_ID "esp8266|securemode=3,timestamp=1234567890,signmethod=hmacsha1|"
// MQTT连接报文参数,请参见MQTT-TCP连接通信文档，文档地址：https://help.aliyun.com/document_detail/73742.html
// 加密明文是参数和对应的值（clientIdesp8266deviceName${deviceName}productKey${productKey}timestamp1234567890）按字典顺序拼接
// 密钥是设备的DeviceSecret
#define MQTT_PASSWD "f1ef80ee8add322c519a5a6bec326dc499f8****"
#define ALINK_BODY_FORMAT "{\"id\":\"123\",\"version\":\"1.0\",\"method\":\"thing.event.property.post\",\"params\":%s}"
#define ALINK_TOPIC_PROP_POST "/sys/" PRODUCT_KEY "/" DEVICE_NAME "/thing/event/property/post"
unsigned long lastMs = 0;
WiFiClient espClient;
PubSubClient client(espClient);
void callback(char *topic, byte *payload, unsigned int length)
{
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
payload[length] = '\0';
Serial.println((char *)payload);
}
void wifiInit()
{
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASSWD);
while (WiFi.status() != WL_CONNECTED)
{
delay(1000);
Serial.println("WiFi not Connect");
}
Serial.println("Connected to AP");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
Serial.print("espClient [");
client.setServer(MQTT_SERVER, MQTT_PORT); /* 连接WiFi之后，连接MQTT服务器 */
client.setCallback(callback);
}
void mqttCheckConnect()
{
while (!client.connected())
{
Serial.println("Connecting to MQTT Server ...");
if (client.connect(CLIENT_ID, MQTT_USRNAME, MQTT_PASSWD))
{
Serial.println("MQTT Connected!");
}
else
{
Serial.print("MQTT Connect err:");
Serial.println(client.state());
delay(5000);
}
}
}
void mqttIntervalPost()
{
char param[32];
char jsonBuf[128];
sprintf(param, "{\"idle\":%d}", digitalRead(13));
sprintf(jsonBuf, ALINK_BODY_FORMAT, param);
Serial.println(jsonBuf);
boolean d = client.publish(ALINK_TOPIC_PROP_POST, jsonBuf);
Serial.print("publish:0 失败;1成功");
Serial.println(d);
}
void setup()
{
pinMode(SENSOR_PIN, INPUT);
/* initialize serial for debugging */
Serial.begin(115200);
Serial.println("Demo Start");
wifiInit();
}
// the loop function runs over and over again forever
void loop()
{
if (millis() - lastMs >= 5000)
{
lastMs = millis();
mqttCheckConnect();
/* 上报消息心跳周期 */
mqttIntervalPost();
}
client.loop();
if (digitalRead(SENSOR_PIN) == HIGH){
Serial.println("Motion detected!");
delay(2000);
}
else {
Serial.println("Motion absent!");
delay(2000);
}
}
参考链接
