Avalon Nano 3S custom firmware OS portal

Flash HashPower OS

Install persistent on-device performance controls on the Avalon Nano 3S without scripts, remote shells, or a desktop utility running in the background. Downloads are protected by reusable one-device flash credits. Your $20 one-time per-device credit is device-locked to the first Nano 3S you verify. Restoring that same Nano back to stock returns the usable flash count, but the credit remains locked to that device for the lifetime of the product.

Factory recovery is public and does not require a key. Supplying the key previously used on the same Nano is optional and allows the server to return an eligible used flash credit after the device identity and completed restore are verified.

Required Browser Chrome, Edge, Brave, or Opera with WebUSB support. Windows Driver Install WinUSB with Zadig before starting the browser flash. USB Mode Put the Nano 3S in recovery/BOOT mode before verifying USB. Need A License? Buy a firmware flash Support

Main Developer and Owner @FrankTheTank908 Main Tech Lead @b0xlife1

Start Firmware Session

Status

Enter a license key and create a session.

Restore Factory Firmware

Verified Full Stock Recovery

Use this when you want to return a Nano 3S to stock firmware or recover from a bad custom flash. When stock browser flashing is available, this page writes the stock KDIMG through the same USB process as custom firmware.

File Avalon_Nano3s_release_Udisk_2026040201_13503fb.aup.img.gz | Version 2026072875 | 35.9 MB | updated 2026-07-28 18:00:00 | SHA-256 4c646f41a2403d4efe3dbc6ecef576aab237966df2abf20663eedeec359922ef

Official Canaan Page Open Recovery Guide

License Key (optional) Leave blank for public recovery. Enter the key previously used on this Nano only when you want an eligible used flash credit returned. Detected Device ID Read directly from the connected Nano in BOOT mode. I confirmed this is an Avalon Nano 3S and understand that flashing an image for another model can prevent it from booting.

Factory recovery is available without a license. A valid device-bound key is optional and returns an eligible used credit only after the same Nano is restored.

Hardware-verified full ten-partition SPI-NAND recovery image built from the pinned Canaan source. After flashing, hold RESET for 15 seconds to clear pools, Wi-Fi, custom screens, and other user settings.

Before You Flash

Supported device: Avalon Nano 3S. This browser flasher is built for HashPower OS custom firmware and factory restore images for the Nano 3S.

Windows Driver

Install WinUSB with Zadig before using browser flashing. Choose the K230 USB Boot Device, confirm VID 29F1 / PID 0230, then install WinUSB.

BOOT Mode

Hold the Nano 3S recovery/BOOT button while connecting USB until the 29F1:0230 device appears.

One-Time Device Credit

The $20 firmware fee is one-time for one Nano. The first verified flash locks the credit to that device.

Public Recovery Path

Restore a supported Nano 3S without a license. An optional same-device key returns an eligible used flash credit after hardware verification.

Guided Browser Flash

This page verifies your key and USB device, checks image integrity, and writes approved firmware through the browser with clear progress and recovery guidance.

Windows Driver Setup

Download Zadig from zadig.akeo.ie, run it as Administrator, open Options, enable List All Devices, then select K230 USB Boot Device or USB download gadget. Confirm the device shows VID 29F1 and PID 0230, choose WinUSB, and click Install Driver or Replace Driver.

Do not replace the driver for your keyboard, mouse, storage drive, phone, or USB hub. If the browser cannot claim the Nano after installing WinUSB, unplug the Nano, hold BOOT again, reconnect USB, and press Verify Nano 3S USB.

Animated walkthrough showing the correct Zadig WinUSB selections for Nano 3S — Confirm both the device name and USB ID before installing. The button may read Install Driver or Replace Driver depending on the current Windows driver.