int connectionId = esp8266.read()-48; // subtract 48 because the read() function returns // the ASCII decimal value and 0 (the first decimal number) starts at 48 esp8266.find("pin="); // advance cursor to "pin=" int pinNumber = (esp8266.read()-48); // get first number i.e...
Serial.begin(115200);setTime(1652609537); }voidonConnectionEstablished(){ Serial.println("connect to mqtt success ");// client.subscribe("$thing/down/property/" + device_id, [] (const String &payload) {// Serial.println(payload);// DeserializationError error = deserializeJson(doc, payload);...
1. 需要在arduino上使用mqtt需要使用库 " PubSubClient "。 2. 使ESP32连接到WiFi网络 3. 连接mqtt代理 4. 订阅主题 5. 发布信息 安装库: 打开arduino选择“工具”里的管理库,在管理库里搜索:Pub SubClient,安装完成后即可使用该库。 在这里先贴上代码,需要可直接copy #include<WiFi.h>#include<PubSubClien...
a = arduino(___,Name,Value) a = arduino(btaddress) a = arduino(btname) a = arduino(ipaddress,board) a = arduino(ipaddress,board,tcpipport) Description USB a= arduinorecreates the last successful connection to the Arduino or Arduino-compatible ESP32 hardware. If there is no last succes...
if(client.connect(host, 80)) { Serial.println("Connected");}else { Serial.println("Connection failed.");} 1. 接下来我们需要执行websocket handshake握手。可通过调用之前声明的WebSocketClient对象的handshake方法来完成握手。此方法的输入参数为WiFiClient对象,利用该对象与服务器通信。
"MPU6050 connection successful" : "MPU6050 connection failed"); // use the code below to change accel/gyro offset values /* Serial.println("Updating internal sensor offsets..."); // -76 -2359 1688 0 0 0 Serial.print(accelgyro.getXAccelOffset()); Serial.print("\t"); // -76 Serial...
a = arduino(___,Name,Value) a = arduino(btaddress) a = arduino(btname) a = arduino(ipaddress,board) a = arduino(ipaddress,board,tcpipport) Description USB a= arduinorecreates the last successful connection to the Arduino or Arduino-compatible ESP32 hardware. If there is no last succes...
注意:Mac 系统需要将 Upload Speed 从 921600 改成 115200,不然会出现 A fatal error occurred: Unable to verify flash chip connection (No serial data received.) 错误。 相关参考链接(来自 http://forum.arduino.cc)实测Windows 系统下无需更改此项。 在“文件”-“示例”-“ESP32”-“GPIO”中找到“bli...
// Connect to WiFi networkWiFi.begin(ssid, password);Serial.println("");// Wait for connection...
● 串行连接（Serial connection）：数据通过单线一位一位地传输 I2C参考设计 在Arduino/ESP8266上，...