Hydrosmart is an advanced water level monitoring system that leverages wireless communication, a touchscreen interface, and real-time data visualization to control and monitor water levels efficiently. The system consists of a transmitter and receiver module that interact seamlessly to automate water level management and motor control. Additionally, the system includes an ESP32 for WiFi connectivity, allowing remote control via a mobile app.
| Component | Description |
|---|---|
| Arduino Nano | Microcontroller board for the transmitter. |
| Arduino Mega 2560 | Microcontroller board for the receiver. |
| ESP32 | WiFi-enabled microcontroller for remote control via mobile app. |
| nRF24L01 PA LNA Module | Long-range RF communication module for wireless data transfer. |
| 2.4” TFT Touch Screen Shield | Touch-enabled LCD display for user interface and visualization. |
| ULN2003 IC | Used for sensing water levels through analog inputs. |
| Relay Module | Controls the motor based on the received water level data. |
Below are some pictures of the touchscreen display used in the receiver. It shows the real-time water level and system status, providing a user-friendly interface for monitoring and control.
The touchscreen showing the water level
Another view of the touchscreen with system's menu page.
| Library | Purpose |
|---|---|
SPI.h |
Enables SPI communication for RF module. |
RF24.h |
Handles RF communication with nRF24L01 module. |
nRF24L01.h |
Driver for nRF24L01 wireless module. |
| Library | Purpose |
|---|---|
Adafruit_GFX.h |
Provides graphics functions for TFT displays. |
Adafruit_TFTLCD.h |
Hardware-specific library for the TFT LCD. |
TouchScreen.h |
Handles touchscreen input from the display. |
SPI.h |
Enables SPI communication for RF module. |
RF24.h |
Handles RF communication with nRF24L01 module. |
nRF24L01.h |
Driver for nRF24L01 wireless module. |
| Library | Purpose |
|---|---|
WiFi.h |
Enables WiFi functionality for ESP32. |
- RF Communication: Utilizes nRF24L01 for wireless data transmission to the receiver.
- Water Level Sensing: Employs ULN2003 IC to read water levels from sensors connected to analog pins.
- Dry Run Detection: Identifies and transmits a dry-run condition to prevent motor damage.
- Compact Design: Ensures low power consumption and efficient data transmission.
- Graphical User Interface: Features an interactive TFT touch screen with dynamic level display.
- Menu Navigation: Multiple operational modes, such as Manual, Automatic, and Level Mode.
- Motor Control: Automatically controls the motor based on water levels and mode settings.
- Real-Time Feedback: Provides graphical updates and alerts for motor status and dry-run conditions.
- Color-Coded UI: Uses a custom color scheme for enhanced visualization, configured using RGB Color Picker.
- Bitmap Integration: Displays icons generated from images converted using Image2CPP.
- WiFi Connectivity: Connects to the mobile app via WiFi to control the system remotely.
- Mobile Control: Allows for motor control (ON/OFF) through a simple web interface served by the ESP32.
- Sensor Data Monitoring: Can send sensor data and motor status to the mobile app.
| Module | Connection Details |
|---|---|
| nRF24L01 PA LNA | Connected via SPI pins to Arduino Nano (MISO, MOSI, SCK, CE, CSN). |
| ULN2003 IC | Connected to sensors for water level input. |
| TFT Touch Screen Shield | Mounted directly onto Arduino Mega for display and touch inputs. |
| Relay Module | Connected to motor control pins on the Arduino Mega. |
| ESP32 | Connected via WiFi to communicate with the mobile app and control the system. |
- Transmitter: Powered by the Arduino Nano's onboard power.
- Receiver: Powered by the Arduino Mega and TFT display's onboard power.
- ESP32: Powered by a separate 5V supply or through USB.
- Libraries: Install the required libraries listed above in your Arduino IDE.
- Transmitter Code: Upload the transmitter code to the Arduino Nano connected to the nRF24L01 module and sensors.
- Receiver Code: Upload the receiver code to the Arduino Mega with the TFT display and nRF24L01 module.
- Power On: Ensure all connections are secure and power both modules.
- Calibrate Touch Screen: (Optional) Perform calibration for precise touch functionality.
- Interactive Display: Easy-to-use touch interface with menu-driven navigation.
- Wireless Monitoring: Reliable long-range communication using nRF24L01 PA LNA modules.
- Automated Control: Intelligent motor activation based on water levels and modes.
- Error Detection: Alerts for dry-run and other anomalies to ensure system reliability.
- Customizable UI: Vibrant and responsive UI with intuitive graphical feedback.
-
No Communication Between Transmitter and Receiver:
- Ensure the nRF24L01 modules are correctly connected to both the Arduino Nano (transmitter) and Arduino Mega (receiver).
- Verify the power supply to the nRF24L01 modules. If the modules are not receiving sufficient power, they may not function properly.
- Check the wiring of the SPI pins (MISO, MOSI, SCK, CE, CSN) for any loose connections or incorrect pin assignments.
- Ensure the correct addresses are used for communication in the code (both transmitter and receiver should match).
-
Water Level Data Not Displaying Correctly:
- Check the ULN2003 IC connections to ensure the water level sensors are providing accurate input to the Arduino Nano.
- Verify the sensor calibration and check for any dirt or obstructions affecting the sensor's operation.
-
Touchscreen Not Responding:
- Recalibrate the touchscreen using the
TouchScreen.hlibrary if the touch input is inaccurate or unresponsive. - Ensure the touchscreen wiring is correct, especially the connections for the
XandYpins.
- Recalibrate the touchscreen using the
-
Motor Not Turning On/Off Correctly:
- Verify the relay module is connected to the correct pins on the Arduino Mega.
- Ensure the motor control logic in the receiver code is correctly processing the water level data and triggering the relay.
- Addition of voice command functionality.
- Improved power efficiency for longer operational lifespan.
- Color Configuration Tool: RGB Color Picker
- Bitmap Conversion Tool: Image2CPP
- Libraries Used: Special thanks to the authors of the libraries used, including
SPI.h,RF24.h,nRF24L01.h,Adafruit_GFX.h,Adafruit_TFTLCD.h, andTouchScreen.h, for providing such useful resources.
- Amith Mathew Titus
- Mohamed Afran
This project is licensed under the MIT License - see the LICENSE file for details.
- Arduino: https://www.arduino.cc
- nRF24L01 Module Documentation: https://www.nordicsemi.com/Products/Low-power-short-range-wireless/nRF24L01
- Adafruit Libraries: https://github.com/adafruit/Adafruit_GFX, https://github.com/adafruit/TFTLCD-Library
- ULN2003 IC Datasheet: https://www.tescaglobal.com/product-detail/ULN2003A
Project Status: Completed ✅