/* * State change detection: 检测按键按下的状态并累计次数 */ // 定义端口 const int ledPin = 13; const int buttonPin = 2; // 设置变量 int currentButtonState = 0; int lastButtonState = 0; int count = 0; void setup() { // 初始化端口 pinMode(ledPin, OUTPUT); pinMode(buttonPin...
// 设置MQTT borker信息 const char *topic = "mqtt_hbb_example"; const char *mqtt_username = "emqx"; const char *mqtt_password = "public"; const int mqtt_port = 1883; const char *client_id = "mqtt-client-hbb-example"; // String client_id = "esp32-client-" + String(WiFi.macAddr...
const int* p 2019-12-12 20:19 −*之前是指针指向的目标,*之后是指针本身的属性(即地址是否可变) const int* ptr1; // (1.) pointer to const int int const * ptr2; // (2.) same as 1. int* const ptr3; ... 夕西行 0 684 ...
}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);/// // Test if parsing succeeds.// if...
WiFiClient client;//声明一个客户端对象,用于与服务器进行连接const int tcpPort=8266;//修改为你建立的Server服务端的端口号,此端口号是创建服务器时指定的。static String comdata="";static String val="";voidsetup(){Serial.begin(115200);pinMode(led,OUTPUT);delay(10);Serial.println();Serial.print...
const int controlPin3A = 6; const int controlPin4A = 8; const int servoENablePin = 3; // Motor control global variables: int motorSpeed = 0; // Motor speed 0..255 int motorDirection = 1; // Forward (1) or reverse (0)
(const char *ssid, const char *passphrase) { WiFi.mode(WIFI_STA); WiFi.begin(ssid, passphrase); while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("WiFi not Connect"); } Serial.println("Connected to AP"); } // 电源属性修改的回调函数 void powerCallback(Json...
const intrs= 8, en = 9, d4 = 10, d5 = 11, d6 = 12, d7 = 13; //Pins to which LCD is connected LiquidCrystal lcd(rs, en, d4, d5, d6, d7); //create the LCD 在设置函数中,我们只显示项目的名称,然后继续主项目所在的 while 循环。
const char* mqtt_server = "broker.mqtt-dashboard.com"; WiFiClient espClient; PubSubClient client(espClient); long lastMsg = 0; char msg[50]; int value = 0; void setup_wifi() { delay(10); Serial.println(); Serial.print("Connecting to "); ...
//蜂鸣器对于的引脚号 int Sound_Delay = 500;//单位毫秒 unsigned long lastInterruptTime = 0;// 记录程序执行时间的变量 char message[50];//OLED显示存储变量,需要设置的比显示字符大,否则溢出可能会导致程序中其余变量的值被修改 const int notes[] = {Do_C, Re_D, Mi_E, Fa_F, Sol_G, La_A...