Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various sensors, a relay, a servo motor, an LED, and an ESP32 microcontroller. The circuit is designed to interface with multiple sensors and actuators, providing a comprehensive setup for a variety of applications such as environmental monitoring and control.

Component List

1. Servo

   • Pins: GND, VCC, PWM
   • Description: A servo motor used for precise control of angular position.
   • Purpose in Circuit: Actuator for mechanical movement.

2. HC-SR04 Ultrasonic Sensor

   • Pins: VCC, TRIG, ECHO, GND
   • Description: An ultrasonic sensor used for distance measurement.
   • Purpose in Circuit: Distance measurement.

3. 12V SINGLE CHANNEL RELAY

   • Pins: NC, COM, NO, IN, GND, VCC
   • Description: A relay used to control high voltage devices.
   • Purpose in Circuit: Switch for high voltage devices.

4. DHT11 Humidity and Temperature Sensor

   • Pins: VDD, DATA, NULL, GND
   • Description: A sensor used to measure humidity and temperature.
   • Purpose in Circuit: Environmental monitoring.

5. PIR Sensor

   • Pins: GND, VCC, Data
   • Description: A passive infrared sensor used for motion detection.
   • Purpose in Circuit: Motion detection.

6. LED: Two Pin (red)

   • Pins: cathode, anode
   • Description: A red LED used for visual indication.
   • Purpose in Circuit: Visual indicator.

7. ESP32 (30 pin)

   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3
   • Description: A microcontroller with Wi-Fi and Bluetooth capabilities.
   • Purpose in Circuit: Central control unit.

8. Resistor

   • Pins: pin1, pin2
   • Description: A resistor with a resistance of 220 Ohms.
   • Purpose in Circuit: Current limiting for the LED.

Wiring Details

Servo

• GND connected to ESP32 GND
• VCC connected to ESP32 Vin
• PWM connected to ESP32 D26

HC-SR04 Ultrasonic Sensor

• VCC connected to ESP32 Vin
• TRIG connected to ESP32 D33
• ECHO connected to ESP32 D32
• GND connected to ESP32 GND

12V SINGLE CHANNEL RELAY

• IN connected to ESP32 D27
• GND connected to ESP32 GND
• VCC connected to ESP32 Vin

DHT11 Humidity and Temperature Sensor

• VDD connected to ESP32 3V3
• DATA connected to ESP32 D4
• GND connected to ESP32 GND

PIR Sensor

• GND connected to ESP32 GND
• VCC connected to ESP32 3V3
• Data connected to ESP32 D15

LED: Two Pin (red)

• cathode connected to ESP32 GND
• anode connected to Resistor pin1

Resistor

• pin1 connected to LED anode
• pin2 connected to ESP32 D13

ESP32 (30 pin)

• D32 connected to HC-SR04 Ultrasonic Sensor ECHO
• D33 connected to HC-SR04 Ultrasonic Sensor TRIG
• D26 connected to Servo PWM
• D27 connected to 12V SINGLE CHANNEL RELAY IN
• D13 connected to Resistor pin2
• GND connected to 12V SINGLE CHANNEL RELAY GND, HC-SR04 Ultrasonic Sensor GND, LED cathode, Servo GND, PIR Sensor GND, DHT11 Humidity and Temperature Sensor GND
• Vin connected to 12V SINGLE CHANNEL RELAY VCC, HC-SR04 Ultrasonic Sensor VCC, Servo VCC
• D4 connected to DHT11 Humidity and Temperature Sensor DATA
• D15 connected to PIR Sensor Data
• 3V3 connected to PIR Sensor VCC, DHT11 Humidity and Temperature Sensor VDD

Code

No code provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a detailed list of components and their wiring connections. This should serve as a useful reference for building and troubleshooting the circuit.