Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32-POE2 microcontroller, a 4 Channel 30A 5V Relay, a 2 Channel 30A 5V Relay, and two DHT22 temperature and humidity sensors. The circuit is designed to control relays and read sensor data using the ESP32-POE2 microcontroller.

Component List

1. ESP32-POE2

   • Description: A microcontroller with multiple GPIO pins, capable of handling various input and output operations.
   • 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. 4 Channel 30A 5V Relay

   • Description: A relay module with four channels, each capable of handling 30A at 5V.
   • Pins: 5V, GND, IN1+, IN1-, IN2+, IN2-, IN3+, IN3-, IN4+, IN4-

3. 2 Channel 30A 5V Relay

   • Description: A relay module with two channels, each capable of handling 30A at 5V.
   • Pins: 5V, GND, IN1, IN2, COM, COM1, NO1, NC1, COM2, NO2, NC2, LOW1, LOW2, HIGH1, HIGH2

4. DHT22

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

Wiring Details

ESP32-POE2

• 5V is connected to:

  • 5V pin of the 4 Channel 30A 5V Relay
  • 5V pin of the 2 Channel 30A 5V Relay

• GPIO2/HS2_DATA0 is connected to:

  • IN1 pin of the 2 Channel 30A 5V Relay

• GPIO3/U0RXD is connected to:

  • IN4+ pin of the 4 Channel 30A 5V Relay

• GPIO4/U1TXD is connected to:

  • IN3+ pin of the 4 Channel 30A 5V Relay

• GPIO5/SPI_CS is connected to:

  • IN2+ pin of the 4 Channel 30A 5V Relay

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

  • IN1+ pin of the 4 Channel 30A 5V Relay

• GND is connected to:

  • GND pin of the 4 Channel 30A 5V Relay
  • IN1- pin of the 4 Channel 30A 5V Relay
  • IN2- pin of the 4 Channel 30A 5V Relay
  • IN3- pin of the 4 Channel 30A 5V Relay
  • IN4- pin of the 4 Channel 30A 5V Relay
  • GND pin of the 2 Channel 30A 5V Relay

• GPIO33 is connected to:

  • Out pin of the DHT22 sensor

• GPIO32 is connected to:

  • Out pin of the second DHT22 sensor

• GPIO14/HS2_CLK(MTMS) is connected to:

  • IN2 pin of the 2 Channel 30A 5V Relay

• 3.3V is connected to:

  • • pin of the DHT22 sensor
  • • pin of the second DHT22 sensor

4 Channel 30A 5V Relay

• 5V is connected to:

  • 5V pin of the ESP32-POE2

• GND is connected to:

  • GND pin of the ESP32-POE2

• IN1+ is connected to:

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

• IN1- is connected to:

  • GND pin of the ESP32-POE2

• IN2+ is connected to:

  • GPIO5/SPI_CS pin of the ESP32-POE2

• IN2- is connected to:

  • GND pin of the ESP32-POE2

• IN3+ is connected to:

  • GPIO4/U1TXD pin of the ESP32-POE2

• IN3- is connected to:

  • GND pin of the ESP32-POE2

• IN4+ is connected to:

  • GPIO3/U0RXD pin of the ESP32-POE2

• IN4- is connected to:

  • GND pin of the ESP32-POE2

2 Channel 30A 5V Relay

• 5V is connected to:

  • 5V pin of the ESP32-POE2

• GND is connected to:

  • GND pin of the ESP32-POE2

• IN1 is connected to:

  • GPIO2/HS2_DATA0 pin of the ESP32-POE2

• IN2 is connected to:

  • GPIO14/HS2_CLK(MTMS) pin of the ESP32-POE2

• COM is connected to:

  • LOW1 pin of the 2 Channel 30A 5V Relay
  • LOW2 pin of the 2 Channel 30A 5V Relay

DHT22

• Out is connected to:

  • GPIO33 pin of the ESP32-POE2 (for the first DHT22)
  • GPIO32 pin of the ESP32-POE2 (for the second DHT22)

• - is connected to:

  • GND pin of the ESP32-POE2

• + is connected to:

  • 3.3V pin of the ESP32-POE2

Code

No code is provided for this circuit.