电脑连接上ESP8266的板子
在arduino编写代码（arduino按照之前的配置，已安装好esp的开发板和几个库ArduinoJson我选了5.的版本，PubSubclient,Crypto,AliyunIoTSDK并且修改pubsubclient的参数）
在项目，加载库，管理库中搜索安装即可
修改pubsubclient的参数，进入目录（不同安装环境可能稍有不同），用记事本打开C:\Users\Administrator\Documents\Arduino\libraries\PubSubClient\src\PubSubClient.h
找到此处进行更改，如果已经打开arduino，关闭重新打开一次
c
// MQTT_VERSION : Pick the version
//#define MQTT_VERSION MQTT_VERSION_3_1
#ifndef MQTT_VERSION
#define MQTT_VERSION MQTT_VERSION_3_1_1
#endif
// MQTT_MAX_PACKET_SIZE : Maximum packet size
#ifndef MQTT_MAX_PACKET_SIZE
#define MQTT_MAX_PACKET_SIZE 1024
#endif
// MQTT_KEEPALIVE : keepAlive interval in Seconds
#ifndef MQTT_KEEPALIVE
#define MQTT_KEEPALIVE 300
#endif
// MQTT_SOCKET_TIMEOUT: socket timeout interval in Seconds
#ifndef MQTT_SOCKET_TIMEOUT
#define MQTT_SOCKET_TIMEOUT 60
#endif下面新建arduino的文件，代码如下，参考文章https://blog.csdn.net/dpjcn1990/article/details/117549363
c
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <PubSubClient.h>
#include <WiFiClientSecure.h>
const char* WIFI_SSID = "xxx"; // WiFi账号密码，注意wifi有时候5G频的不行要连24的
const char* WIFI_PASSWORD = "xxxx"; // WiFi密码
/******************产品/设备配置(每个人需要根据自己的产品设备信息去动态更换)**********************/
#define PRODUCT_KEY "a1hyxxxx" //产品key 从产品详情获取
#define DEVICE_NAME "LEDxxxx" //设备deviceName 从设备详情获取
// 服务端相关
#define MQTT_SERVER PRODUCT_KEY ".iot-as-mqtt.cn-shanghai.aliyuncs.com" //阿里云MQTT服务地址
#define MQTT_PORT 1883 //MQTT服务端口
// 校验三元组
#define MQTT_CLIENT_ID DEVICE_NAME "|securemode=2,signmethod=hmacsha1|" //mqtt clientid
#define MQTT_USERNAME DEVICE_NAME "&" PRODUCT_KEY //mqtt username
#define MQTT_PASSWORD "A223500DBC4xxxxxxxx" //mqtt password 通过生成工具获得，工具中clientID就填DEVICE_NAME
// 相关主题 自定义一个主题
#define TOPIC1 "/a1hyxxxx/LEDxxxx/thing/service/OpenDevice"
/*************************************************************************************************/
void mqtt_callback (char* topic, byte* payload, unsigned int length);
void doWiFiTick();
void connect_wifi();
void connectToMqtt();
const __FlashStringHelper* connectErrorToString(int8_t code);
WiFiClient client;
PubSubClient mqttclient(MQTT_SERVER, MQTT_PORT, &mqtt_callback, client);
bool ICACHE_FLASH_ATTR connectHTTPS() {
Serial.print("connecting to ");
Serial.println(MQTT_SERVER);
if (!client.connect(MQTT_SERVER, MQTT_PORT)) {
Serial.println(F("connection failed"));
return false;
}
else {
Serial.println(F("connection succeed"));
return true;
}
}
void setup() {
// put your setup code here, to run once:
delay(2000);
Serial.begin(115200);
// Serial.print("MQTT_SERVER:");
// Serial.println(MQTT_SERVER);
// Serial.print("MQTT_CLIENT_ID:");
// Serial.println(MQTT_CLIENT_ID);
// Serial.print("MQTT_USERNAME:");
// Serial.println(MQTT_USERNAME);
// Serial.print("TOPIC1:");
// Serial.println(TOPIC1);
pinMode(LED_BUILTIN, OUTPUT);
Serial.println("");
}
void loop() {
// put your main code here, to run repeatedly:
ESP.wdtFeed();
doWiFiTick();
if (WiFi.status() == WL_CONNECTED) {
connectToMqtt();
mqttclient.loop();
}
delay(2000);
}
/**
* 功能：连接到WiFi热点
*/
void connect_wifi() {
WiFi.disconnect();
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.print(F("\nWiFi connected to "));
Serial.println(WIFI_SSID);
Serial.print(F("IP address: "));
Serial.println(WiFi.localIP());
}
/**
* 功能：连接到Mqtt
*/
void connectToMqtt() {
if (mqttclient.connected()) {
return;
}
Serial.print(F("Connecting to MQTT... "));
int8_t ret;
uint8_t retries = 3;
while (!mqttclient.connect(MQTT_CLIENT_ID, MQTT_USERNAME,MQTT_PASSWORD)) { // connect will return true for connected
Serial.println(connectErrorToString(mqttclient.state()));
Serial.println(F("Retrying MQTT connection in 5 seconds..."));
mqttclient.disconnect();
delay(5000); // wait 5 seconds
retries--;
if (retries == 0) {
// basically die and wait for WDT to reset me
while (1);
}
yield();
}
Serial.println(F("Success!"));
// 订阅主题
mqttclient.subscribe(TOPIC1);
}
/**
* 功能：连接路由心跳函数
*/
void doWiFiTick() {
static bool taskStarted = false;
static bool startSTAFlag = false;
static uint32_t lastWiFiCheckTick = 0;
if (!startSTAFlag) {
startSTAFlag = true;
Serial.print("connect to ap:");
Serial.println(WIFI_SSID);
WiFi.disconnect();
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.printf("Heap size:%d\r\n", ESP.getFreeHeap());
}
//未连接1s重连
if ( WiFi.status() != WL_CONNECTED ) {
if (millis() - lastWiFiCheckTick > 1000) {
lastWiFiCheckTick = millis();
Serial.print(".");
}
}
//连接成功建立
else {
if (taskStarted == false) {
taskStarted = true;
Serial.print("\r\nGet IP Address: ");
Serial.println(WiFi.localIP());
}
}
}
/**
* 功能：MQTT回调
* 参数：
* 1. topic 主题
* 2. payload 载体
* 3. length 载体长度
*/
void mqtt_callback (char* topic, byte* payload, unsigned int length) {
byte *end = payload + length;
for (byte *p = payload; p < end; ++p) {
Serial.print(*((const char *)p));
}
Serial.println("");
parseMqttResponse((char *)payload);
}
/**
* 解析mqtt数据
*/
void parseMqttResponse(char* payload){
Serial.println("start parseOneNetMqttResponse");
StaticJsonBuffer<100> jsonBuffer;
// StaticJsonBuffer 在栈区分配内存 它也可以被 DynamicJsonBuffer（内存在堆区分配） 代替
// DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.parseObject(payload);
// Test if parsing succeeds.
if (!root.success()) {
Serial.println("parseObject() failed");
return ;
}
//String deviceName = root["dn"];
//int status = root["s"];
String method = root["method"];
Serial.println(method);
// if(strcmp(DEVICE_NAME,deviceName.c_str())== 0){
// if (status == 1) {
// digitalWrite(LED_BUILTIN, LOW);
// } else {
// digitalWrite(LED_BUILTIN, HIGH);
// }
// }
if (method == "thing.service.CloseDevice") {
digitalWrite(LED_BUILTIN, HIGH);
} else {
digitalWrite(LED_BUILTIN, LOW);
}
}
/**
* 功能：打印错误
* 参数：
* 1. code 错误码
*/
const __FlashStringHelper* connectErrorToString(int8_t code) {
switch (code) {
case 1: return F("The Server does not support the level of the MQTT protocol requested");
case 2: return F("The Client identifier is correct UTF-8 but not allowed by the Server");
case 3: return F("The MQTT service is unavailable");
case 4: return F("The data in the user name or password is malformed");
case 5: return F("Not authorized to connect");
case 6: return F("Exceeded reconnect rate limit. Please try again later.");
case 7: return F("You have been banned from connecting. Please contact the MQTT server administrator for more details.");
case -1: return F("Connection failed");
case -2: return F("Failed to subscribe");
case -3: return F("Connection Lost");
case -4: return F("Connection Timeout");
default: return F("Unknown error");
}
}arduino代码中这一行信息，用此签名工具计算得出，双击sign的网页
c
#define MQTT_PASSWORD "A223500DBC4xxxxxxxx" //mqtt password 通过生成工具获得，工具中clientID就填DEVICE_NAME
其中productKey和devicename，devicSecret在阿里云的设备管理页面都可以获取，clientID和devicename一致，timestamp可以不填，生成即可
上传，编译验证就可以发现阿里云的网页上该设备上线