Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a DHT22 temperature and humidity sensor, a 1 Channel 30A 5V Relay, a 4 Channel 5V Relay, and multiple Door MC-38 magnetic contact sensors. The ESP32 microcontroller serves as the central control unit, interfacing with the sensors and relays to perform various tasks.

Component List

1. ESP32-POE2

   • Description: A powerful microcontroller with built-in Wi-Fi and Ethernet capabilities.
   • Pins: 12/24V Selectable, 5VP, 5V, 3.3V, EN, GPIO0, GPIO1/U0TXD, GPIO2/HS2_DATA0, GPIO3/U0RXD, GPIO4/U1TXD, GPIO5/SPI_CS, GPIO12/PHY_PWR (MTDI), GPIO13/12C-SDA (MTCK), GND, GPI39, GPI36/U1RXD, GPI35, GPI34/BUT1, GPIO33, GPIO32, GPIO16/I2C-SCL, GPIO15/HS2_CMD(MTDO), GPIO14/HS2_CLK(MTMS), GPIO13/I2C-SDA(MTCK)

2. DHT22

   • Description: A temperature and humidity sensor.
   • Pins: +, Out, -

3. 1 Channel 30A 5V Relay

   • Description: A single-channel relay module capable of handling high current loads.
   • Pins: 5V VCC, GND, IN

4. Relay 4 Channel 5V

   • Description: A four-channel relay module for controlling multiple devices.
   • Pins: GND, IN1, IN2, IN3, IN4, VCC, COM1, COM2, COM3, COM4, NO1, NO2, NO3, NO4, NC1, NC2, NC3, NC4

5. Door MC-38

   • Description: A magnetic contact sensor used for detecting the opening and closing of doors.
   • Pins: S, GND

Wiring Details

ESP32-POE2

• 5V is connected to:

  • 1 Channel 30A 5V Relay (5V VCC)
  • Relay 4 Channel 5V (VCC)

• GPIO1/U0TXD is connected to:

  • DHT22 (Out)

• GPIO2/HS2_DATA0 is connected to:

  • 1 Channel 30A 5V Relay (IN)

• GPIO3/U0RXD is connected to:

  • Relay 4 Channel 5V (IN4)

• GPIO4/U1TXD is connected to:

  • Relay 4 Channel 5V (IN3)

• GPIO5/SPI_CS is connected to:

  • Relay 4 Channel 5V (IN2)

• GPIO13/12C-SDA (MTCK) is connected to:

  • Relay 4 Channel 5V (IN1)

• GND is connected to:

  • 1 Channel 30A 5V Relay (GND)
  • Relay 4 Channel 5V (GND)
  • Door MC-38 (GND)
  • DHT22 (-)

• GPIO33 is connected to:

  • Door MC-38 (GND)

• GPIO32 is connected to:

  • Door MC-38 (GND)

• GPIO15/HS2_CMD(MTDO) is connected to:

  • Door MC-38 (GND)

• GPIO14/HS2_CLK(MTMS) is connected to:

  • Door MC-38 (S)

• 3.3V is connected to:

  • DHT22 (+)

DHT22

• Out is connected to:

  • ESP32-POE2 (GPIO1/U0TXD)

• - is connected to:

  • Relay 4 Channel 5V (GND)
  • Door MC-38 (S)
  • ESP32-POE2 (GND)

• + is connected to:

  • ESP32-POE2 (3.3V)

1 Channel 30A 5V Relay

• 5V VCC is connected to:

  • ESP32-POE2 (5V)

• IN is connected to:

  • ESP32-POE2 (GPIO2/HS2_DATA0)

• GND is connected to:

  • ESP32-POE2 (GND)

Relay 4 Channel 5V

• VCC is connected to:

  • ESP32-POE2 (5V)

• IN4 is connected to:

  • ESP32-POE2 (GPIO3/U0RXD)

• IN3 is connected to:

  • ESP32-POE2 (GPIO4/U1TXD)

• IN2 is connected to:

  • ESP32-POE2 (GPIO5/SPI_CS)

• IN1 is connected to:

  • ESP32-POE2 (GPIO13/12C-SDA (MTCK))

• GND is connected to:

  • DHT22 (-)
  • ESP32-POE2 (GND)

Door MC-38

• GND is connected to:

  • ESP32-POE2 (GPIO33)
  • ESP32-POE2 (GPIO32)
  • ESP32-POE2 (GPIO15/HS2_CMD(MTDO))

• S is connected to:

  • ESP32-POE2 (GPIO14/HS2_CLK(MTMS))
  • DHT22 (-)

Code

No code is provided for this circuit.