{ string d = ""; int ind = Convert.ToInt32(v); if (ind == 0 || ind == 360) { d = "正北"; } else if (ind == 90) { d = "正东"; } else if (ind == 180) { d = "正南"; } else if (ind == 270) { d = "正西"; } else if (ind > 0
int32_t w, int32_t h, int32_t radius, uint32_t color),绘制一个圆角矩形，在x和y位置具有r半径圆角，w宽度和h高度和t颜色fillRoundRect(int32_t x0, int32_t y0, int32_t w, int32_t h, int32_t radius, uint32_t color),绘制一个填充的圆角矩形，其中x和y位置具有r半径圆角，w宽度和...
问如何使用ESP32cam在bme680传感器的mqtt上发布数据EN之前介绍了RabbitMQ以及如何在SpringBoot项目中整合使用RabbitMQ，看过的朋友都说写的比较详细，希望再总结一下目前比较流行的MQTT。所以接下来，就来介绍什么MQTT？它在IoT中有着怎样的作用？如何在项目中使用MQTT？
void loop() { int level = analogRead(MIC_PIN); int16_t buffer[2] = {level, level}; if (level > 1000) { textToSpeak = String(buffer[0]) + "\0"; // Convert the audio input to text. Serial.println(textToSpeak); espeak.Synth(textToSpeak.c_str(), -1, pos, espeakCHARS); ...
int len = 8 * u8g2.getBufferTileHeight() * u8g2.getBufferTileWidth(); // len = 1024 , 8 * 8 * 16 uint8_t *p = u8g2.getBufferPtr(); // 1bye = 8bit 即 1111 1111 uint8_t return_flag = 0; // Serial.println("len:" + String(len)); ...
stringESP_LOGI(TCP_TAG,"Received %d bytes: %s", len, rx_buffer);// send() can return less bytes than supplied length.// Walk-around for robust implementation.intto_write = len;while(to_write >0) {intwritten = send(sock, rx_buffer + (len - to_write), to_write,0);if(written ...
Ported to Arduino ESP32 by Evandro Copercini */#include<BLEDevice.h>#include<BLEUtils.h>#include<BLEScan.h>#include<BLEAdvertisedDevice.h>intscanTime=5;// in secondsBLEScan*pBLEScan;class MyAdvertisedDeviceCallbacks:public BLEAdvertisedDeviceCallbacks{voidonResult(BLEAdvertisedDevice advertisedDevice...
String device_id ="PL0RB5H8QV/dev1";EspMQTTClientclient("wifi_name","wifi_pwd","PL0RB5H8QV.iotcloud.tencentdevices.com",// MQTT Broker server ip"your_user_name",// username"your_pwd",// pwd"TestClient"// Client name that uniquely identify your device);voidsetup(){ ...
using the ESP32-S3FH4R2, but I'm unable to flash any program onto it. I've attempted to download the programming via UART, but I'm encountering difficulties. I've also tried using an FTDI for communication, and while the COM port detection occurs, I'm still unable to flash the ...
esp_sleep_enable_timer_wakeup(transmissionInterval * 1000000); // Convert seconds to microseconds } /* 循环函数 */ void loop() { if (transmissionCount < maxTransmissions) { if (!client.connected()) { reconnect(); } client.loop(); ...