# felis/USB_Host_Shield_2.0

Revision 2.0 of USB Host Library for Arduino.

Repository: https://github.com/felis/USB_Host_Shield_2.0
Canonical: https://ross.abutalabs.com/products/usb_host_shield_20
Homepage: https://chome.nerpa.tech
Language: C++
License Family: other
Last push: 2026-05-21T08:28:45+00:00

## Health v2 (maintenance only)
Score: 60/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 83, release rhythm 8, longevity 100
- inputs: {"age_days": 5551, "days_push": 104, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1942, forks 792 (observed 2026-08-28T04:05:57.527615+00:00)

## What it is
Revision 2.0 of the USB Host Shield library for Arduino, driving the MAX3421E USB host controller. It supports USB devices including game controllers (PS3/PS4/PS5, Xbox, Wii, Switch Pro), Bluetooth HID, MIDI, mass storage, FTDI serial, and Android ADK.

## Use cases
- connect a PS4 or Xbox controller to an Arduino
- read files from a USB flash drive on Arduino
- use a USB keyboard or mouse with an Arduino
- send and receive MIDI over USB on Arduino
- host Bluetooth devices with an Arduino USB shield
- interface an Arduino with Android via ADK

## When to choose
- you have a MAX3421E-based USB Host Shield and an Arduino-compatible board
- you need to host USB peripherals like gamepads, HID devices, or mass storage on a microcontroller

## When to avoid
- your board has native USB host support and you want a simpler driver stack
- you need a license other than GPL or require a formal license file
- you are not using AVR/Arduino-compatible hardware

## Facets
- artifact type: library
- maturity: maintenance
- function: embedded, sdk, file-system
- domain: embedded-systems, hardware, developer-tools
- platform: embedded, cpp, iot
- tags: arduino, usb-host, max3421e, bluetooth, hid, gamepad, usb-mass-storage, hardware-library

## Member repositories
- felis/USB_Host_Shield_2.0 (main) score 60

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:57.527615+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:08:04.089318+00:00, confidence not recorded.
  - readme: https://github.com/felis/USB_Host_Shield_2.0 (fetched 2026-08-28T04:05:57.527615+00:00, sha 02914cd5dbee)
  - homepage: https://chome.nerpa.tech (fetched 2026-08-29T10:47:10.780766+00:00, sha b1fb3c092874)
  - site_page: https://chome.nerpa.tech/about (fetched 2026-08-29T10:47:10.783703+00:00, sha f2744f2c788a)
- Data as of 2026-08-30T08:39:29.467469+00:00.