Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as a DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module, multiple relay modules, DHT22 sensors, an ESP32-POE-ISO microcontroller, and a power supply. The circuit is designed to interface with multiple relays and sensors, controlled via I2C and GPIO connections.

Component List

1. DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module

   • Description: I2C-based 16-channel digital I/O expander.
   • Pins: SDA, SCL, GND, 5V/VCC, RST, IA (Interrupt Detection Pin) A, IB (Interrupt Detection Pin) B, 0 (PA0), 1 (PA1), 2 (PA2), 3 (PA3), 4 (PA4), 5 (PA5), 6 (PA6), 7 (PA7), 8 (PB0), 9 (PB1), 10 (PB2), 11 (PB3), 12 (PB4), 13 (PB5), 14 (PB6), 15 (PB7)

2. Relay 4 Channel 5v

   • Description: 4-channel relay module for switching high-power devices.
   • Pins: GND, IN1, IN2, IN3, IN4, VCC, COM1, COM2, COM3, COM4, NO1, NO2, NO3, NO4, NC1, NC2, NC3, NC4

3. DHT22

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

4. 4 Channel 30a 5V Relay

   • Description: High-power 4-channel relay module.
   • Pins: 5V, GND, IN1+, IN1-, IN2+, IN2-, IN3+, IN3-, IN4+, IN4-

5. ESP32-POE-ISO

   • Description: ESP32 microcontroller with Power over Ethernet (PoE) and isolation.
   • Pins: GPI39 (VN), GPI36 (VP), GPI35, GPI34, GPIO33, GPIO32, GPIO16, GPIO15, GPIO14, GPIO13, 5v, 3.3v, GND, EN, GPIO0, GPIO1, GPIO2, GPIO3, GPIO4, GPIO5

6. POWER SUPPLY 5V 5AMP

   • Description: Power supply providing 5V at 5A.
   • Pins: 220V Positive Pole (AC), 220V Negative Pole (AC), GND, GND (DC), 12V-24V Output (DC)

Wiring Details

DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module

• 0 (PA0) connected to 4 Channel 30a 5V Relay IN1+
• 1 (PA1) connected to 4 Channel 30a 5V Relay IN2+
• 2 (PA2) connected to 4 Channel 30a 5V Relay IN3+
• 3 (PA3) connected to 4 Channel 30a 5V Relay IN4+
• 4 (PA4) connected to 4 Channel 30a 5V Relay IN1+
• 5 (PA5) connected to 4 Channel 30a 5V Relay IN2+
• 6 (PA6) connected to 4 Channel 30a 5V Relay IN3+
• 7 (PA7) connected to 4 Channel 30a 5V Relay IN4+
• 8 (PB0) connected to Relay 4 Channel 5v IN1
• 9 (PB1) connected to Relay 4 Channel 5v IN2
• 10 (PB2) connected to Relay 4 Channel 5v IN3
• 11 (PB3) connected to Relay 4 Channel 5v IN4
• SCL connected to ESP32-POE-ISO GPIO5
• SDA connected to ESP32-POE-ISO GPIO14
• 5V/VCC connected to POWER SUPPLY 5V 5AMP 12V-24V Output (DC)
• GND connected to POWER SUPPLY 5V 5AMP GND (DC)

Relay 4 Channel 5v

• IN1 connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 8 (PB0)
• IN2 connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 9 (PB1)
• IN3 connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 10 (PB2)
• IN4 connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 11 (PB3)
• VCC connected to POWER SUPPLY 5V 5AMP 12V-24V Output (DC)
• GND connected to POWER SUPPLY 5V 5AMP GND (DC)

DHT22

• + connected to POWER SUPPLY 5V 5AMP 12V-24V Output (DC)
• - connected to POWER SUPPLY 5V 5AMP GND (DC)
• Out connected to ESP32-POE-ISO GPIO13

DHT22 (Second Instance)

• + connected to POWER SUPPLY 5V 5AMP 12V-24V Output (DC)
• - connected to POWER SUPPLY 5V 5AMP GND (DC)
• Out connected to ESP32-POE-ISO GPIO16

4 Channel 30a 5V Relay

• IN1+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 0 (PA0)
• IN2+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 1 (PA1)
• IN3+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 2 (PA2)
• IN4+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 3 (PA3)
• 5V connected to POWER SUPPLY 5V 5AMP 12V-24V Output (DC)
• GND connected to POWER SUPPLY 5V 5AMP GND (DC)

4 Channel 30a 5V Relay (Second Instance)

• IN1+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 4 (PA4)
• IN2+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 5 (PA5)
• IN3+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 6 (PA6)
• IN4+ connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 7 (PA7)
• 5V connected to POWER SUPPLY 5V 5AMP 12V-24V Output (DC)
• GND connected to POWER SUPPLY 5V 5AMP GND (DC)

ESP32-POE-ISO

• GPIO5 connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module SCL
• GPIO14 connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module SDA
• GPIO13 connected to DHT22 Out
• GPIO16 connected to DHT22 (Second Instance) Out
• GND connected to POWER SUPPLY 5V 5AMP GND (DC)

POWER SUPPLY 5V 5AMP

• 12V-24V Output (DC) connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module 5V/VCC, Relay 4 Channel 5v VCC, 4 Channel 30a 5V Relay 5V, 4 Channel 30a 5V Relay (Second Instance) 5V, DHT22 +, DHT22 (Second Instance) +
• GND (DC) connected to DFRobot Gravity MCP23017 I2C 16 Digital IO Expansion Module GND, Relay 4 Channel 5v GND, 4 Channel 30a 5V Relay GND, 4 Channel 30a 5V Relay (Second Instance) GND, DHT22 -, DHT22 (Second Instance) -, ESP32-POE-ISO GND

Code

No code is provided for