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Midea mini dongle

Midea mini dongle

This is the Midea mini dongle - USB stick for air conditioners controlled by the Midea UART protocol.

This repository contains a schematic and PCB layout for a Midea mini dongle.

Some credits before start

Thanks to Sergey V. Dudanov who created an excelent midea_ac component for ESPHome that integrates midea-like aircondititioners with Home Assistant.

Schematics are based on manufacturers datasheets but some component values come from Adafruit Learning System so thanks to Adafruit for keeping their products open source.

Idea

Small dongle with minimum components and fully assembled by PCB manufacturing service in standard case.

Prototyping

Make prototypes with a ready modules and found that midea_ac is very usefull and have stable result.

Prototype 1Prototype 2

If you want to make your own with cheap modules please read this.

Schematic

This is the schematic of Midea mini dongle

Schematic

Download pdf file Schematic_midea-mini-dongle.pdf

PCB

Dimensions:

  • Width x Height: 44x20mm
  • USB connector: +15mm
  • Overall: 59x20mm
  • Thickness: 0.8mm

2D View

2D View

3D View

3D View

Case

PCB is designed for Gainta G1901 case

Case

Ordering and manufacturing

Hardware

Dongles manufactured and fully assembled by JLCPCB

Dongles

PCB and the case

Dongle and case Midea mini dongle

Firmware

You may use simple config or create your own one following the instructions on the ESPHome website.

Flashing

Please read flashing manual

Installing

Installing Wifi

Dashboard

Dashboard

Resources

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This repository contains a schematic and PCB layout for a Midea mini dongle.

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