Bluetooth Controlled Data Logger Robot For Soil Testing

The Bluetooth Controlled Data Logger Robot For Soil Testing operates by integrating wireless communication, motor control, and environmental sensing on an Arduino Uno development board. The system is powered by an onboard power supply or battery, providing regulated voltage to the microcontroller, sensors, and actuators. For mobility, the Arduino interfaces with an L293D motor driver chip, which manages the current and directional logic required by the two DC gear motors for navigation, alongside a DC servo motor for positioning specific components. Wireless commands are sent from an Android smartphone via an HC-05 Bluetooth module, which transmits serial data to the Arduino Uno. Upon receiving movement instructions, the microcontroller adjusts the motor driver outputs to steer the rover. Simultaneously, data collection is performed by an array of onboard sensors: a soil moisture sensor evaluates the conductive properties of the earth, a DHT11 sensor measures ambient temperature and humidity, and an LDR (Light Dependent Resistor) captures light intensity levels. Connecting wires route all signals and power distribution between the microcontroller pins, sensor modules, and actuators, allowing the rover to simultaneously navigate terrain and gather multi-parameter environmental data for analysis.