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.

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.

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

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

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

This is the schematic of Midea mini dongle

Download pdf file Schematic_midea-mini-dongle.pdf

Dimensions:

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

PCB is designed for Gainta G1901 case

• Gerber files: Gerber_pcb-midea-mini-dongle-v1.3_2021-05-14.zip
• BOM file: BOM_pcb-midea-mini-dongle-v1.3_2021-05-14.csv
• CPL file: PickAndPlace_pcb-midea-mini-dongle-v1.3_2021-05-14.csv

Dongles manufactured and fully assembled by JLCPCB

PCB and the case

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

Please read flashing manual

• midea_ac component for ESPHome
• midea-open-dongle
• Midea HVAC WiFi Dongle