Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates an ESP8266 ESP-01 WiFi Module, an Arduino UNO, an LCD screen 16x2 I2C, a 12V Single Channel Relay, and an ESP32 CAM. The circuit is designed to facilitate communication between these components, with the Arduino UNO serving as the central microcontroller. The document includes a component list, wiring details, and the embedded code used in the Arduino UNO.

Component List

ESP8266 ESP-01 WiFi Module

• Description: WiFi module for wireless communication.
• Pins: TXD, CH_PD, RST, VCC, GND, GPIO_2, GPIO_0, RXD

Arduino UNO

• Description: Microcontroller board based on the ATmega328P.
• 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

LCD screen 16x2 I2C

• Description: 16x2 character LCD display with I2C interface.
• Pins: SCL, SDA, VCC, GND

12V Single Channel Relay

• Description: Relay module for switching high voltage devices.
• Pins: NC, COM, NO, IN, GND, VCC

ESP32 CAM

• Description: Camera module with WiFi and Bluetooth capabilities.
• Pins: 5V, GND, GPIO12, GPIO13, GPIO15, GPIO14, GPIO2, GPIO4, 3.3V, GPIO16, GPIO0, 3.3V / 5V / P_OUT, GPIO3 / RX, GPIO1 / TX

Power 220V

• Description: Power supply for the circuit.
• Pins: hot wire, neutral wire

Wiring Details

ESP8266 ESP-01 WiFi Module

• TXD connected to Arduino UNO D2
• VCC connected to Arduino UNO 5V, LCD screen 16x2 I2C VCC, 12V Single Channel Relay VCC
• GND connected to Arduino UNO GND
• RXD connected to Arduino UNO D3

Arduino UNO

• 5V connected to ESP8266 ESP-01 WiFi Module VCC, LCD screen 16x2 I2C VCC, 12V Single Channel Relay VCC
• GND connected to ESP8266 ESP-01 WiFi Module GND, LCD screen 16x2 I2C GND, 12V Single Channel Relay GND, ESP32 CAM GND
• 3.3V connected to ESP32 CAM 3.3V
• D2 connected to ESP8266 ESP-01 WiFi Module TXD
• D3 connected to ESP8266 ESP-01 WiFi Module RXD
• A4 connected to LCD screen 16x2 I2C SDA
• A5 connected to LCD screen 16x2 I2C SCL
• D5 connected to 12V Single Channel Relay IN
• D1 connected to ESP32 CAM GPIO3 / RX
• D0 connected to ESP32 CAM GPIO1 / TX

LCD screen 16x2 I2C

• VCC connected to Arduino UNO 5V, ESP8266 ESP-01 WiFi Module VCC, 12V Single Channel Relay VCC
• GND connected to Arduino UNO GND, 12V Single Channel Relay GND, ESP32 CAM GND
• SDA connected to Arduino UNO A4
• SCL connected to Arduino UNO A5

12V Single Channel Relay

• VCC connected to Arduino UNO 5V, ESP8266 ESP-01 WiFi Module VCC, LCD screen 16x2 I2C VCC
• GND connected to Arduino UNO GND, LCD screen 16x2 I2C GND, ESP32 CAM GND
• IN connected to Arduino UNO D5
• NC connected to NO and Power 220V neutral wire
• COM connected to Power 220V hot wire

ESP32 CAM

• 3.3V connected to Arduino UNO 3.3V
• GND connected to Arduino UNO GND, LCD screen 16x2 I2C GND, 12V Single Channel Relay GND
• GPIO3 / RX connected to Arduino UNO D1
• GPIO1 / TX connected to Arduino UNO D0

Power 220V

• hot wire connected to 12V Single Channel Relay COM
• neutral wire connected to 12V Single Channel Relay NC and NO

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:

}

Documentation (documentation.txt)

This document provides a comprehensive overview of the circuit, including the components used, their wiring details, and the embedded code for the Arduino UNO.