Midea USB Dongle PCB Design

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I completed the schematic and compact PCB placement for the ESP32-C6 Midea HVAC USB dongle. The project is now renamed, uses a 25 mm × 70 mm 4-layer dongle outline, has USB-A on one end, USB-C on the other, ESP32-C6 edge antenna placement, TXS0108E 5V UART level shifting, TLV758 3.3V regulation, WS2812B LED, boot/reset controls, and full decoupling; schematic ERC was clean before layout.
Estimated time saved vs. manual EDA workflow: ~8–12 hours.
Open items:
  • Routing is not complete because the account currently has no available ACUs, so AI routing/checking features are unavailable.
  • Manufacturing docs, firmware starter, bring-up plan, and final JLCPCB export still need to be generated.
  • The USB-A D+/D− pins are currently used as the Midea UART 5V lines; this should be checked against the exact original dongle pinout before ordering.
Suggested next steps:
  1. Add ACUs, then ask me to route the PCB and run final DRC/airwire checks.
  2. Ask me to verify the Midea USB-A pinout against the GitHub project before routing.
  3. Ask me to generate firmware starter and board bring-up files.
  4. Ask me to prepare JLCPCB assembly-ready BOM/placement/export files after routing.
Verify USB-A pinout
Generate firmware files
Prepare JLCPCB files
Run ERC/DRC
U1
GND
U1 GND_2__14 - U2 GND
U1 IO2 - R8 P1
U1 IO8 - R9 P2
U1 RXD0 - U2 A2
U2 OE - R7 P2
U1 TXD0 - U2 A1
U3 OUT - U1 3V3
J1 DN2 - U1 IO12
U1 IO9 - R6 P2
J1 DP2 - U1 IO13
U1 EN - R5 P2
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ESP32-C6 Midea HVAC Dongle thumbnail
Compact USB dongle PCB for Midea air conditioners based on the mideahvac-dongle architecture, using an ESP32-C6 module, 5V UART level shifting, WS2812B status LED, USB-A appliance connector, and USB-C programming/power.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$0.77–$1.50

Digi-Key

$3.11

HQonline

$0.34

LCSC

$5.14

Mouser

$6.81

TME

$6.17

Verical

$0.57–$1.50

Controls