Circuit Documentation

Summary

This circuit is designed to control multiple relays using an ESP32 microcontroller. The relays are activated by push buttons and a PIR motion sensor. The circuit includes an 8-channel relay module, an ESP32 Devkit V1, several push buttons, a PIR motion sensor, and a power source. The ESP32 runs a program that reads inputs from the push buttons and the PIR sensor to control the relays, which in turn control various devices such as fans and lights.

Component List

1. 8 Channel Relay JD-VCC

   • Description: A relay module with 8 channels, used to control high voltage devices.
   • Pins: JD-VCC, VCC, GND, In1, In2, In3, In4, In5, In6, In7, In8, In1_NC, IN1_COM, IN1_NO, IN2_NC, IN2_COM, IN2_NO, IN3_NC, IN3_COM, IN3_NO, IN4_NC, IN4_COM, IN4_NO, IN5_NC, IN5_COM, IN5_NO, IN6_NC, IN6_COM, IN6_NO, IN7_NC, IN7_COM, IN7_NO, IN8_NC, IN8_COM, IN8_NO

2. Power 220V

   • Description: A 220V power source.
   • Pins: Hot wire, Neutral wire

3. ESP32 Devkit V1

   • Description: A development board for the ESP32 microcontroller.
   • Pins: 3V3, GND, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, VIN

4. Push Button Round

   • Description: A simple push button switch.
   • Pins: Leg0, Leg1

5. PIR/Motion Sensor

   • Description: A sensor that detects motion.
   • Pins: GND, OUTPUT, VCC

Wiring Details

8 Channel Relay JD-VCC

• VCC: Connected to VIN of ESP32 Devkit V1
• GND: Connected to GND of ESP32 Devkit V1
• In1: Not connected
• In2: Connected to Leg0 of Push Button Round
• In3: Connected to Leg0 of Push Button Round
• In4: Connected to Leg0 of Push Button Round
• In5: Connected to Leg0 of Push Button Round
• In6: Connected to Leg0 of Push Button Round
• In7: Connected to Leg0 of Push Button Round
• In8: Not connected
• IN1_COM: Connected to Hot wire of Power 220V
• IN2_COM: Connected to Hot wire of Power 220V
• IN3_COM: Connected to Hot wire of Power 220V
• IN4_COM: Connected to Hot wire of Power 220V
• IN5_COM: Connected to Hot wire of Power 220V
• IN6_COM: Connected to Hot wire of Power 220V
• IN1_NO: Connected to Neutral wire of Power 220V
• IN2_NO: Connected to Neutral wire of Power 220V
• IN3_NO: Connected to Neutral wire of Power 220V
• IN4_NO: Connected to Neutral wire of Power 220V
• IN5_NO: Connected to Neutral wire of Power 220V
• IN6_NO: Connected to Neutral wire of Power 220V

Power 220V

• Hot wire: Connected to IN1_COM, IN2_COM, IN3_COM, IN4_COM, IN5_COM, IN6_COM of 8 Channel Relay JD-VCC
• Neutral wire: Connected to IN1_NO, IN2_NO, IN3_NO, IN4_NO, IN5_NO, IN6_NO of 8 Channel Relay JD-VCC

ESP32 Devkit V1

• VIN: Connected to VCC of 8 Channel Relay JD-VCC
• GND: Connected to GND of 8 Channel Relay JD-VCC and GND of PIR/Motion Sensor
• 3V3: Connected to VCC of PIR/Motion Sensor
• D18: Connected to Leg1 of Push Button Round
• D19: Connected to Leg1 of Push Button Round
• D21: Connected to Leg1 of Push Button Round
• D22: Connected to OUTPUT of PIR/Motion Sensor
• D23: Connected to Leg1 of Push Button Round
• D25: Connected to Leg1 of Push Button Round
• D26: Connected to Leg1 of Push Button Round

Push Button Round

• Leg0: Connected to In2, In3, In4, In5, In6, In7 of 8 Channel Relay JD-VCC
• Leg1: Connected to D18, D19, D21, D23, D25, D26 of ESP32 Devkit V1

PIR/Motion Sensor

• GND: Connected to GND of ESP32 Devkit V1
• OUTPUT: Connected to D22 of ESP32 Devkit V1
• VCC: Connected to 3V3 of ESP32 Devkit V1

Code Documentation

#include <Arduino.h>

// Define pin connections
#define PIR_SENSOR_PIN 22
#define FAN1_RELAY_PIN 18
#define FAN2_RELAY_PIN 19
#define LIGHT1_RELAY_PIN 21
#define LIGHT2_RELAY_PIN 23
#define LIGHT3_RELAY_PIN 25
#define LIGHT4_RELAY_PIN 26

#define SWITCH1_PIN 18
#define SWITCH2_PIN 19
#define SWITCH3_PIN 21
#define SWITCH4_PIN 23
#define SWITCH5_PIN 25
#define SWITCH6_PIN 26

// Variables to store the state of the relays
bool fan1State = false;
bool fan2State = false;
bool light1State = false;
bool light2State = false;
bool light3State = false;
bool light4State = false;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Initialize PIR sensor pin
  pinMode(PIR_SENSOR_PIN, INPUT);

  // Initialize relay pins
  pinMode(FAN1_RELAY_PIN, OUTPUT);
  pinMode(FAN2_RELAY_PIN, OUTPUT);
  pinMode(LIGHT1_RELAY_PIN, OUTPUT);
  pinMode(LIGHT2_RELAY_PIN, OUTPUT);
  pinMode(LIGHT3_RELAY_PIN, OUTPUT);
  pinMode(LIGHT4_RELAY_PIN, OUTPUT);

  // Initialize switch pins
  pinMode(SWITCH1_PIN, INPUT_PULLUP);
  pinMode(SWITCH2_PIN, INPUT_PULLUP);
  pinMode(SWITCH3_PIN, INPUT_PULLUP);
  pinMode(SWITCH4_PIN, INPUT_PULLUP);
  pinMode(SWITCH5_PIN, INPUT_PULLUP);
  pinMode(SWITCH6_PIN, INPUT_PULLUP);

  // Turn off all relays initially
  digitalWrite(FAN1_RELAY_PIN, LOW);
  digitalWrite(FAN2_RELAY_PIN, LOW);
  digitalWrite(LIGHT1_RELAY_PIN, LOW);
  digitalWrite(LIGHT2_RELAY_PIN, LOW);
  digitalWrite(LIGHT3_RELAY_PIN, LOW);
  digitalWrite(LIGHT4_RELAY_PIN, LOW);
}

void loop() {
  // Read PIR sensor value
  int pirValue = digitalRead(PIR_SENSOR_PIN);

  // If motion is detected, turn on fans and lights
  if (pirValue == HIGH) {
    fan1State = true;
    fan2State = true;
    light1State = true;
    light2State = true;
    light3State = true;
    light4State = true;
  }

  // Read switch states and toggle corresponding relays
  if (digitalRead(SWITCH1_PIN) == LOW) {
    fan1State = !fan1State;
    delay(200); // Debounce delay
  }
  if (digitalRead(SWITCH2_PIN) == LOW) {
    fan2State = !fan2State;
    delay(200); // Debounce delay
  }
  if (digitalRead(SWITCH3_PIN)