Circuit Documentation

Summary

The circuit in question is designed to control various devices, including relays, LEDs, and bulbs, using an ESP32 Devkit V1 microcontroller. The circuit includes pushbuttons for user input, a PIR motion sensor for detecting movement, and a 4-channel relay module for controlling AC-powered devices. The ESP32 Devkit V1 is the central processing unit that receives inputs from the pushbuttons and the PIR sensor to control the state of the LEDs and the relay channels, which in turn control the power to the bulbs and sockets.

Component List

ESP32 Devkit V1

• Microcontroller with WiFi and Bluetooth capabilities.
• It has multiple GPIO pins for interfacing with other components.

Relay 4 Channel 5v

• A module with 4 relays capable of controlling high voltage/current devices.
• Each relay has a Normally Open (NO) and a Normally Closed (NC) contact.

Pushbutton (4 instances)

• A simple pushbutton switch that provides a digital input to the microcontroller.

PIR Motion Sensor (Wokwi Compatible)

• A sensor that detects motion based on infrared signals.
• It provides a digital output signal.

LED: Two Pin (green)

• A basic green LED that lights up when powered.

Bulb (2 instances)

• Represents a generic light bulb that can be powered by an AC source.

AC source

• Provides alternating current power to the circuit.

Socket (2 instances)

• An AC power socket that can be controlled by the relay module.

GND

• A ground reference point for the circuit.

Wiring Details

ESP32 Devkit V1

• 3V3 connected to Relay VCC and PIR Sensor VCC.
• D2 connected to LED anode.
• D19, D21, D22, D23 connected to Relay IN4, IN3, IN2, IN1 respectively.
• D34 connected to PIR Sensor OUT.
• D27, D14, D12, D13 connected to Pushbuttons.
• GND connected to common ground net.

Relay 4 Channel 5v

• VCC connected to ESP32 3V3.
• IN1, IN2, IN3, IN4 connected to ESP32 D23, D22, D21, D19 respectively.
• COM1, COM2 connected to Sockets life.
• COM3, COM4 connected to Bulbs power.
• NO1, NO2, NO3, NO4 connected to AC source +.
• GND connected to common ground net.

Pushbutton (4 instances)

• Pin 3 (out) connected to ESP32 D27, D14, D12, D13 respectively.
• Pin 2 (in) connected to common ground net.

PIR Motion Sensor (Wokwi Compatible)

• VCC connected to ESP32 3V3.
• OUT connected to ESP32 D34.
• GND connected to common ground net.

LED: Two Pin (green)

• anode connected to ESP32 D2.
• cathode connected to common ground net.

Bulb (2 instances)

• power connected to Relay COM3, COM4 respectively.
• GND connected to common ground net.

AC source

• + connected to Relay NO1, NO2, NO3, NO4.
• - connected to common ground net.

Socket (2 instances)

• life connected to Relay COM1, COM2 respectively.
• neutral connected to common ground net.

Documented Code

There is no code provided for the microcontroller. The expected behavior would be for the ESP32 to read inputs from the pushbuttons and the PIR sensor and control the state of the LED and relay channels accordingly. The code would likely involve setting up GPIO pins as inputs or outputs, reading digital inputs, and writing digital outputs to control the relays and LED. Without the actual code, we cannot provide further documentation on the software part of this circuit.