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--- iothings:proiecte:2025sric:babymonitorsystem [2025/04/22 19:20]
catalin.patrascu99
+++ iothings:proiecte:2025sric:babymonitorsystem [2025/05/26 17:06] (current)
catalin.patrascu99 [App]
@@ Line 9: / Line 9: @@
 The baby monitoring system provides a way for parents to track the baby's sleeping environment by tracking the light levels, the sound and the temperature. When a certain threshold is reached the system alerts the parents by email. The system also stores the sensor data and generates weekly reports for the parents.
 ====== Architecture ======
+{{ :iothings:proiecte:2025sric:baby-monitor-flow.drawio.png |}}
 ====== Hardware ======
+  * ESP-WROVER-32 board
+  * Analog sound sensor module
+  * DHT11 temperature and humidity sensor
+  * Cables
+=== Setup ===
+{{ :iothings:proiecte:2025sric:real-life-view-baby-monitor.png |}}
+=== Wiring scheme ===
+{{ :iothings:proiecte:2025sric:wiring-scheme.drawio.png |}}
 ====== Software ======
+  * Arduino IDE
+  * Blynk cloud desktop and mobile
 === Code Snippets ===
-====== Challenges ======
+pins are used for the 2 sensors: 4 and 34
+<code>
+#define DHTPIN 4
+#define DHTTYPE DHT11
+#define SOUND_ANALOG_PIN 34
+</code>
+Sensor reading and writing
+<code>
+void sendSensorData() {
+  float temp = dht.readTemperature();
+  float hum = dht.readHumidity();
+  int soundLevel = analogRead(SOUND_ANALOG_PIN);
+  if (isnan(temp) || isnan(hum)) {
+    Serial.println("Failed to read from DHT sensor");
+    return;
+  }
+  Serial.printf("Temp: %.1f °C | Humidity: %.1f %% | Sound: %d\n", temp, hum, soundLevel);
+  Blynk.virtualWrite(V1, temp);
+  Blynk.virtualWrite(V2, hum);
+  Blynk.virtualWrite(V3, soundLevel);
+</code>
+Event generation
+<code>
+  if (temp > 21) {
+    Blynk.logEvent("high_temperature", "Temperature too high!");
+    Serial.println("Temp big enough");
+  }
+  if (hum < 30) {
+    Blynk.logEvent("low_humidity", " Humidity too low!");
+  }
+  if (soundLevel > 40) {
+    Blynk.logEvent("high_noise", "High noise level detected!");
+  }
+}
+</code>
+====== App ======
+Blynk is a tool that lets you build and manage your own IoT projects easily. It was used to create custom dashboards on the desktop and mobile app.
+With it I added gauges that I dragged onto the screen and use to control or check the devices from anywhere. Blynk connects everything over Wi-Fi, so you get real-time updates and control without needing to mess with complex setups. It was used to alsop send notifications over email and in-app
+=== Functionalities ===
+In this project, the ESP32 collects data from a DHT11 sensor to measure temperature and humidity, and from a sound sensor to check noise levels. It sends that data to the Blynk app, where you can see live values on your phone using gauges and other widgets.
+You can also set up notifications — for example, get an email if the temperature gets too high or if there’s too much noise. Everything works over Wi-Fi, so you can monitor things remotely without being near the device.
+{{ :iothings:proiecte:2025sric:blynk-app1.png |}}
+{{ :iothings:proiecte:2025sric:high-temp.png |}}
+{{ :iothings:proiecte:2025sric:mail-notification.png |}}
 ====== References ======
+DHT11 Sensor:
+    *https://www.mouser.com/datasheet/2/758/DHT11-Technical-Data-Sheet-Translated-Version-1143054.pdf?srsltid=AfmBOoqV_7f-O5_81wa86uw0G8xZHDAm9nsilDFuUwfnBUqEm2UTZy6k
+    *https://components101.com/sensors/dht11-temperature-sensor
+Sound sensor:
+    *https://components101.com/modules/lm393-sound-detection-sensor-module
+    *https://energiazero.org/cartelle/arduino_sensori/sound_sensor_module.pdf
+Drawio: https://app.diagrams.net/
+Blynk: https://docs.blynk.io/en/getting-started/what-do-i-need-to-blynk