Circuit Documentation
Summary
This circuit is designed to monitor soil moisture levels and control a relay based on the moisture readings. It uses an Arduino UNO microcontroller to read data from a soil moisture sensor and display the readings on an LCD screen. Additionally, a relay is used to control a buzzer, which can be activated based on the moisture levels.
Component List
Arduino UNO
- Description: A microcontroller board based on the ATmega328P.
- Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0
5V Relay
- Description: A relay module that operates at 5V.
- Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC
SparkFun Soil Moisture Sensor
- Description: A sensor to measure the moisture content in the soil.
- Pins: VCC, GND, SIG
Soil Moisture Module
- Description: A module to interface with the soil moisture sensor.
- Pins: positive, negative, Analog, Digital, Ground, VCC
LCD Screen 16x2 I2C
- Description: A 16x2 character LCD display with I2C interface.
- Pins: SCL, SDA, VCC, GND
5V Battery
- Description: A 5V power source.
- Pins: +, -
Buzzer
- Description: A simple buzzer for audio alerts.
- Pins: PIN, GND
Wiring Details
Arduino UNO
- A0: Connected to Soil Moisture Module (Analog)
- A4: Connected to LCD Screen 16x2 I2C (SDA)
- A5: Connected to LCD Screen 16x2 I2C (SCL)
- D2: Connected to 5V Relay (In)
5V Relay
- In: Connected to Arduino UNO (D2)
- Normally Open: Connected to 5V Relay (VCC), Soil Moisture Module (VCC), LCD Screen 16x2 I2C (VCC), 5V Battery (+)
- Common terminal: Connected to Buzzer (PIN)
- GND: Connected to Soil Moisture Module (Ground), LCD Screen 16x2 I2C (GND), Buzzer (GND), 5V Battery (-)
SparkFun Soil Moisture Sensor
- VCC: Connected to Soil Moisture Module (positive)
- GND: Connected to Soil Moisture Module (negative)
Soil Moisture Module
- Analog: Connected to Arduino UNO (A0)
- positive: Connected to SparkFun Soil Moisture Sensor (VCC)
- negative: Connected to SparkFun Soil Moisture Sensor (GND)
- Ground: Connected to 5V Relay (GND)
- VCC: Connected to 5V Relay (Normally Open)
LCD Screen 16x2 I2C
- SDA: Connected to Arduino UNO (A4)
- SCL: Connected to Arduino UNO (A5)
- VCC: Connected to 5V Relay (Normally Open)
- GND: Connected to 5V Relay (GND)
5V Battery
- +: Connected to 5V Relay (Normally Open)
- -: Connected to 5V Relay (GND)
Buzzer
- PIN: Connected to 5V Relay (Common terminal)
- GND: Connected to 5V Relay (GND)
Documented Code
Arduino UNO Code (sketch.ino)
void setup() {
}
void loop() {
}
Additional Documentation (documentation.txt)
This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the Arduino UNO microcontroller.