PCB For ESP32 USB Host Development Board

Description

This Empty Bare PCB board For a small USB bridge built around ESP32-WROOM-32.

A USB scanner or keyboard plugs into the USB-A host port (CH554). The ESP32 receives that data on UART and sends it to a CH9329, which appears to the computer as a normal USB keyboard. No driver is required on Windows, macOS, or Linux.

You program the ESP32 yourself. The included Arduino example prints host data on the serial monitor and types printable ASCII into the PC. Change the sketch to filter barcodes, add Wi-Fi, MQTT, or any protocol you need.

How it works

USB scanner / keyboard → USB-A host (CH554) → ESP32 GPIO16 @ 115200 → GPIO4 @ 9600 → CH9329 → PC HID keyboard

Features

• USB-A host for barcode scanners, HID keyboards, and similar devices
• Driver-free USB HID keyboard output to the PC (CH9329, ASCII mode)
• ESP32-WROOM-32 with Wi-Fi and Bluetooth
• Open Arduino example: host UART → Serial monitor + HID
• 6-pin programming header for a USB-TTL adapter
• Power LED and GPIO23 user LED
• 3.3 V LDO from USB 5 V
• https://github.com/UGEelectronics/ESP32-USB-Host-HID-Keyboard-Bridge