Build a Bluetooth Powered Buzzer Alarm
Learn how to build a simple buzzer alarm you can control via your phone's Bluetooth using BluetooIno and an HC-05 Bluetooth module.
Introduction
Automating plant watering is a rewarding project that combines Arduino, sensors, and Bluetooth communication to keep your plants healthy with minimal effort. This beginner-friendly project introduces you to soil moisture sensors, relay control for pumps or valves, and wireless command sending via BluetooIno. It’s perfect for anyone wanting to add smart features to their gardening setup without complicated hardware.
How it works
In this project, BluetooIno connects to the Arduino through an HC-05 Bluetooth module. Using the app’s Buttons Controller or Terminal Controller, you can send commands to start or stop the watering process. The Arduino receives these commands and triggers a relay controlling a water pump or solenoid valve, which waters your plants. The soil moisture sensor data can also be integrated to automate watering based on soil conditions, making it a flexible system for manual or automatic irrigation.
Wiring the project
1.Connect the HC-05 module’s TX to Arduino RX (pin 0) and RX to Arduino TX (pin 1).
2.Power the HC-05 with 5V and GND from the Arduino.
3.Connect a soil moisture sensor’s analog output to Arduino analog pin A0.
4.Connect a relay module’s input pin to Arduino digital pin 7.
5.Wire the water pump or solenoid valve to the relay’s normally open contact, powered by an appropriate external source.
6.Ensure all grounds are common and secure.
Check that your relay and pump power requirements are met, and use protection diodes where needed.
Upload Arduino code that reads soil moisture values, accepts Bluetooth commands, and switches the relay accordingly to start or stop watering.
Conclusion
This Bluetooth-controlled plant watering system is a practical introduction to smart gardening using Arduino and wireless control. With BluetooIno, managing your irrigation remotely is simple and intuitive. Whether you want manual control or automation based on soil moisture, this project offers flexibility and ease for beginners aiming to add tech to their green space.
