Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to monitor environmental conditions and control devices such as a water pump, AC bulb, and a fan. The circuit includes sensors for temperature, humidity, soil moisture, and light intensity, and it uses an Arduino UNO microcontroller to process the data and control the devices. The circuit also includes a WiFi module for remote monitoring and control.

Component List

1. DHT 11

   • Pins: VCC, GND, DATA
   • Description: Temperature and Humidity Sensor
   • Purpose: Measures temperature and humidity levels.

2. Soil Moisture Module

   • Pins: positive, negative, Analog, Digital, Ground, VCC
   • Description: Soil Moisture Sensor
   • Purpose: Measures the moisture level in the soil.

3. Module LDR

   • Pins: VCC, GND, DO, AO
   • Description: Light Dependent Resistor Module
   • Purpose: Measures light intensity.

4. Water Pump

   • Pins: positive, negative
   • Description: Water Pump
   • Purpose: Pumps water for irrigation.

5. AC Bulb

   • Pins: P, N
   • Description: AC Bulb
   • Purpose: Provides illumination.

6. 5V Relay

   • Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC
   • Description: Relay Module
   • Purpose: Controls high voltage devices.

7. WiFi Module ESP8266-01

   • Pins: RX, GPIO0, GPIO2, GND, +3V3, Reset, CH-PD Chip power down, TX
   • Description: WiFi Module
   • Purpose: Provides WiFi connectivity.

8. SparkFun gator:soil

   • Pins: VCC, GND, SIG
   • Description: Soil Moisture Sensor
   • Purpose: Measures the moisture level in the soil.

9. Arduino UNO

   • 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
   • Description: Microcontroller
   • Purpose: Central processing unit for the circuit.

10. actodc

    • Pins: 12v, -, 5v, live, neutral
    • Description: AC to DC Converter
    • Purpose: Converts AC power to DC power.

11. Power 220V

    • Pins: hot wire, neutral wire
    • Description: Power Source
    • Purpose: Provides 220V AC power.

12. 120 Fan 12V

    • Pins: 12V+, GND
    • Description: Fan
    • Purpose: Provides ventilation.

Wiring Details

DHT 11

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• DATA connected to D2 of Arduino UNO

Soil Moisture Module

• VCC connected to 5V of Arduino UNO
• Ground connected to GND of Arduino UNO
• Analog connected to A0 of Arduino UNO
• positive connected to VCC of SparkFun gator:soil
• negative connected to GND of SparkFun gator:soil

Module LDR

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• AO connected to A1 of Arduino UNO

Water Pump

• positive connected to Normally Open of 5V Relay
• negative connected to - of actodc

AC Bulb

• P connected to Normally Open of 5V Relay
• N connected to neutral wire of Power 220V

5V Relay (1)

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• In connected to D5 of Arduino UNO
• Common terminal connected to 12v of actodc
• Normally Open connected to positive of Water Pump

5V Relay (2)

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• In connected to D4 of Arduino UNO
• Common terminal connected to 12v of actodc
• Normally Open connected to 12V+ of 120 Fan 12V

5V Relay (3)

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• In connected to D3 of Arduino UNO
• Common terminal connected to 12v of actodc
• Normally Open connected to P of AC Bulb

WiFi Module ESP8266-01

• +3V3 connected to 3.3V of Arduino UNO
• CH-PD Chip power down connected to 3.3V of Arduino UNO
• GND connected to GND of Arduino UNO
• TX connected to D7 of Arduino UNO
• RX connected to D6 of Arduino UNO

SparkFun gator:soil

• VCC connected to positive of Soil Moisture Module
• GND connected to negative of Soil Moisture Module

Arduino UNO

• 3.3V connected to +3V3 and CH-PD Chip power down of WiFi Module ESP8266-01
• 5V connected to VCC of DHT 11, Soil Moisture Module, Module LDR, and all 5V Relays
• GND connected to GND of DHT 11, Soil Moisture Module, Module LDR, WiFi Module ESP8266-01, and all 5V Relays
• A0 connected to Analog of Soil Moisture Module
• A1 connected to AO of Module LDR
• D2 connected to DATA of DHT 11
• D3 connected to In of 5V Relay (3)
• D4 connected to In of 5V Relay (2)
• D5 connected to In of 5V Relay (1)
• D6 connected to RX of WiFi Module ESP8266-01
• D7 connected to TX of WiFi Module ESP8266-01

actodc (1)

• 12v connected to Common terminal of 5V Relay (1)
• - connected to negative of Water Pump

actodc (2)

• 12v connected to Common terminal of 5V Relay (2)
• - connected to GND of 120 Fan 12V

Power 220V

• hot wire connected to Common terminal of 5V Relay (3)
• neutral wire connected to N of AC Bulb

120 Fan 12V

• 12V+ connected to Normally Open of 5V Relay (2)
• GND connected to - of actodc (2)

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)