usbmux

USB 2.0 two input channel multiplexer based on TS3USB221

Details

A simple USB2.0 2-channel multiplexer controlled using: UART(Serial) CLI and HTTP server available running at: usbmux.local.

Instalation

• Install vscode with platformio plugin (Versions: vscode[1.49.2], platformio[Core:5.0.1, Home:3.3.0])

Building and flashing

# Build an application
platformio run

# Build filesystem
platformio run --target buildfs --environment d1_mini

# Upload filesystem image
platformio run --target uploadfs --environment d1_mini

# Upload the application binary
platformio run --target upload

# All in one-liner
platformio run  &&  platformio run --target buildfs --environment d1_mini  &&  platformio run --target uploadfs --environment d1_mini  &&  platformio run --target upload

Pinout

• HW pinout defined at: usbmux/app/src/hw_config.h
• Board connector pinout:

Schematics

More random pics

• Completed device:
• UART(Serial) CLI:
• Web server:

BOM

PART NAME	SHOP LINK	DATASHEET	QUANTITY	PRICE [PLN]
ESP8266 WEMOS D1-MINI	AliExpress	ESP8266-D1MINI	1	7.99
TS3USB221 - USB 2.0 Mux	AliExpress	TS3USB221	1	6.00
Relay module	AliExpress	-	1	2.09
CASE type: Z23	Allegro	Z23	1	3.39
Micro USB 2.0 male connector	Allegro	-	1	1.20
Mini USB 2.0 male connector	Allegro	-	1	1.40
Micro USB 2.0 female to DIP Adapter	Allegro	-	1	2.29
Mini USB 2.0 female to DIP Adapter	Allegro	-	1	2.29
				= 26.65