Smart Weather Warning Terminal System Based on ESP32-P4

Hello everyone, I'm Yassin. Under the trend of the intelligent connection of all things, I have designed and implemented a smart weather warning terminal system based on ESP32-P4. The system consists of two main parts: a meteorological data acquisition board and a display terminal. It can collect various environmental data in real time, including temperature and humidity, air pressure, light intensity, ultraviolet radiation, carbon dioxide concentration, wind speed and direction, as well as lightning warning information. All data is wirelessly transmitted to the display terminal via LoRa for visual presentation. Adopting a modular design concept, the system completes the whole development process from scheme design to physical realization, covering sensor selection, hardware circuit design, communication protocol formulation and software programming. It is a typical application of Internet of Things technology in the field of environmental monitoring.

This system is suitable for various scenarios requiring real-time meteorological monitoring and early warning, with broad application value:

The software part is developed based on the Arduino framework environment, adopting the modular programming concept to improve code readability and maintainability. The specific implementation is as follows:

		if (CompareTime(&TimeWiFi_Send))
    {
			SetTime(&TimeWiFi_Send, 500); // 每3000ms进来一次
			static char jsonString[300]; // 假设 JSON 字符串不超过 512 字节
			snprintf(jsonString, sizeof(jsonString),
					"{\"T\":%.1f,\"H\":%.1f,\"P\":%.1f,\"L\":%u,"
					"\"UV\":%d,\"TVOC\":%d,\"Ws\":%.1f,\"Wl\":%.1f,"
					"\"Fx\":\"%s\",\"Wa\":%.1f,\"Ld\":%d}",
					Humiture.Temp,
					Humiture.RH,
					pressurehpa,
					g_usLux,
					UV_VALUE,
					TVOC,
					windSpeed,
					windLevel,
					fengxiang,
					Wind_Angle,
					lightning_distance
			);


			usartPrintf(huart1, "%s\r\n", jsonString);		
			
		}

void parseSerialJSON() {
  while (mySerial.available()) {
    char c = mySerial.read();

    if (c == '\n') {

      StaticJsonDocument<512> doc;
      DeserializationError err = deserializeJson(doc, serialBuffer);

      if (!err) {

        // ===== 温湿度 & 气压 =====
        if (doc.containsKey("T"))
          sensorData.temperature = doc["T"].as<float>();

        if (doc.containsKey("H"))
          sensorData.humidity = doc["H"].as<float>();

        if (doc.containsKey("P"))
          sensorData.pressure = doc["P"].as<float>();

        // ===== 光照 =====
        if (doc.containsKey("L"))
          sensorData.lightLux = doc["L"].as<uint32_t>();

        // ===== UV =====
        if (doc.containsKey("UV"))
          sensorData.uv = doc["UV"].as<int>();

        // ===== TVOC =====
        if (doc.containsKey("TVOC"))
          sensorData.tvoc = doc["TVOC"].as<int>();

        // ===== 风速 & 风力 =====
        if (doc.containsKey("Ws"))
          sensorData.windSpeed = doc["Ws"].as<float>();

        if (doc.containsKey("Wl"))
          sensorData.windLevel = doc["Wl"].as<float>();

        // ===== 风向字符串 =====
        if (doc.containsKey("Fx")) {
          const char* fx = doc["Fx"];
          strncpy(sensorData.windDirStr, fx,
                  sizeof(sensorData.windDirStr) - 1);
          sensorData.windDirStr[sizeof(sensorData.windDirStr) - 1] = '\0';
        }

        // ===== 风向角 =====
        if (doc.containsKey("Wa"))
          sensorData.windAngle = doc["Wa"].as<float>();

        // ===== 雷电距离=====
        if (doc.containsKey("Ld")) {
            sensorData.lightningDistance = doc["Ld"].as<float>();
            sensorData.lightning = (sensorData.lightningDistance > 0);
        }

        drawUI();
      }

      serialBuffer = "";
    }
    else {
      if (serialBuffer.length() < 512)
        serialBuffer += c;
      else
        serialBuffer = "";
    }
  }

}