Arduino Nano Circuit
Overview
This circuit will have a collection of sensors that will capture data and send it to the communication circuit for generating alerts or displaying on a dashboard (on the web or on the mobile app).
Components
| Component | Purpose | Voltage | Ouput/Communication |
|---|---|---|---|
| DHT11/22 Sensor | Temperature and Humidity sensor | 3.3V | Digital In |
| HCSR04 | Ultrasonic distance sensor | 3.3V | Digital Out (Trigger), Digital In (Echo) |
| HSR501 Sensor | Motion sensor | 3.3V | Digital In |
| IR Sensor | Infrared sensor | 3.3V | Digital In |
| MQ-Series Sensor | Gas sensor | 3.3V | Analog In |
| KY037 | Sound sensor | 3.3V | Analog In |
| Soil Moisture Sensor and Probe | Soil moisture sensor | 3.3V | Analog In |
| MPU6050 3-Axis Accelerometer | Measures motion along 3-axis (Yaw, Roll, Pitch) | 3.3V | I2C |
| BP280 | Measure Altitude using barometric pressure | 3.3V | I2C |
| Relay | Used to switch electrical devices on and off | 3.3V | Digital Out |
| SX1278 RA-02 | LoRa communication module | 3.3V | SPI (plus an NSS pin) |
| I2C LCD 16x2 | Used to display data | 5V | I2C |
| Buzzer | Used to make a sound | 5V | Digital Out |
| LED | Used as an indicator | 5V | Digital Out (use a resistor to limit the current) |
| Potentiometer | Used to vary resistance | 3.3V | Analog In |