https://github.com/pilotak/eth-io

ESP32 based ethernet I/O board for home automation
https://github.com/pilotak/eth-io

diy esp32 esphome ethernet home-automation input mcp23017 meter output power s0 tasmota

Last synced: 3 months ago
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ESP32 based ethernet I/O board for home automation

• Host: GitHub
• URL: https://github.com/pilotak/eth-io
• Owner: pilotak
• Created: 2021-03-20T15:09:33.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2022-12-20T15:17:41.000Z (about 2 years ago)
• Last Synced: 2023-02-28T15:15:54.262Z (almost 2 years ago)
• Topics: diy, esp32, esphome, ethernet, home-automation, input, mcp23017, meter, output, power, s0, tasmota
• Homepage:
• Size: 5.29 MB
• Stars: 53
• Watchers: 10
• Forks: 14
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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# ETH IO

ESP32 based ethernet I/O board for home automation compatible with ESPHome, Tasmota, etc.

**Features**:

- wide range of input voltage 6-28V

- 4x opto-isolated "fast" operation inputs (connected to GPIO)

- 16x opto-isolated general inputs (connected to MCP23017 expander)

- 2x PWM capable low-side fully protected switches (connected to GPIO)

- 16x low-side fully protected switches for switching the non-latching relays or SSR relays (connected to MCP23017 expander)

- daisy chain design - see below

![ETH_IO_1](./images/ETH_IO_1.jpg)

![ETH_IO_2](./images/ETH_IO_2.jpg)

## Basic wiring

![Wiring 1](./images/wiring_1.jpg)

## "Fast" inputs

Are meant to be used for reading pulses from utility meter ie. power meter with S0 output

![Wiring 2](./images/wiring_2.jpg)

## Daisy chain design

Should you need more inputs/outputs (up to 96 more inputs/outputs or combination thanks to changing the address of MCP23017) you can use the same PCB. Just don't populate ETH breakout board and ESP32 and solder AMS1117-3.3 with its capacitor. The boards will be connected via SDA/SCL but thanks to a bus buffer (P82B96) communication can easilly be made up to 20 meters (possibly more by reducing speed of I2C bus)!

> In this mode the "slave" device can't make use of S0 inputs nor the PWM outputs

![Wiring 3](./images/wiring_3.jpg)

_For more information please visit [wiki](https://github.com/pilotak/eth-io/wiki)_