yanaginx / simple-4parts-iot

A simple 4 parts IOT projects

Simple 4 parts IOT system

The implementation of a IOT system consists of 4 main parts:

• Sensor nodes: DHT11 Temperature Humidity Sensor
• Connectivity: ESP-NOW protocol, UART protocol, MQTT protocol
• Data processing:
  • The sensor send data to gateway node (consist of an ESP board and an Android smartphone) through wireless ESP-NOW protocol.
  • Then gateway's ESP board using UART protocol to send data to the mentioned smartphone.
  • The smartphone then send the received data to a server with MQTT protocol.
  • The UI then can fetch the data from the server through provided API.
• User interface:
  • The UI mobile application: DataFetcher dir, built with Android Studio
  • The UI provided by adafruit

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Components:

Hardware

• Sensor node: ESP8266 with DHT11 sensor.
• Gateway node: ESP32 and a USB otg connect to the smartphone installed the UART_MQTT app.

The ESP boards can be altered since the coding was based on Arduino library.

Application

The mobile_application dir contains:

• DataFetcher: The UI application fetching the data from the server.
• UART_MQTT: The Application parts of the Gateway node.

Those 2 applications are built using Android Studio. Proceed to install them to your devices with Android Studio.

The MCU_module dir contains:

• GatewayMCU source code
• SensorNode source code

Both can be deployed to the boards using Arduino IDE, I was using PlatformIO for the development so there are some other directories there.

In-depth information (hopefully detailed enough) can be found at the Report dir.

Demo:

The demonstration of the system can be found here.