Serial.print("Attempting MQTT connection..."); // 创建一个ID String clientId = "ESP8266Client-"; clientId += String(random(0xffff), HEX); // 连接服务器 if (client.connect(clientId.c_str())) { Serial.println("connected"); // 发布消息 client.publish("outTopic", "hello world"); ...
Serial.begin ( 115200 ); WiFi.begin ( ssid, password ); Serial.println (""); // Wait for connection while( WiFi.status() != WL_CONNECTED ) { delay ( 500 ); Serial.print ("."); } Serial.println (""); Serial.print ("Connected to "); ...
Serial.begin(115200); irrecv.enableIRIn(); // Start the receiver while (!Serial) // Wait for the serial connection to be establised. delay(50); Serial.println(); Serial.print("IRrecvDemo is now running and waiting for IR message on Pin "); Serial.println(kRecvPin); } void loop() ...
Timeout—Maximum time to wait for serial data 1(default) |[0 8] Object Functions readRead data from serial device writeWrite data to serial device collapse all Create Connection to Serial Device on Arduino Hardware This example uses:
"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...
Serial.begin(9600); // while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only // } // set the data rate for the SoftwareSerial port // pinMode(10,INPUT_PULLUP); // pinMode(11,INPUT_PULLUP);
Some serial devices use the RS-232 standard for serial connection. These usually have a nine-pin connector, and an adapter is required to use them with the Arduino. RS-232 uses voltage levels that will damage Arduino digital pins, so you will need to obtain an RS-232 to TTL adapter to...
Serial.println(SSID_NAME); // Connect to WPA/WPA2 network. Change this line if using open or WEP network: status = WiFi.begin(SSID_NAME, SSID_PASS); // wait 10 seconds for connection: delay(10000); } Serial.println("Connected to wifi"); ...
Serial.println("IP address: "); Serial.println(WiFi.localIP()); } void loop() { delay(1); if (bConnected == false) { if (!client.connect(serverIP, serverPort)) { Serial.println("connection failed"); delay(5000); return; } bConnected = true; Serial.println("connection ok"); }...
// Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only } // start the Ethernet connection: if (Ethernet.begin(mac) == 0) { ...