BlueSCSI Wi-Fi Desk Accessory

The open-source, open-hardware SCSI emulator BlueSCSI v2 can emulate a SCSI Ethernet device using the Wi-Fi chip on its Raspberry Pi Pico W microcontroller, with firmware functionality I wrote in mid-2023. While this becomes largely set-it-and-forget-it on desktops, portable Macintoshes can benefit from the ability to see Wi-Fi signal strength and join other networks without having to edit the BlueSCSI configuration file.

In addition to the basic network packet bridging code that I added to BlueSCSI's firmware, I also added a set of vendor SCSI commands that enable scanning for nearby networks, joining a new network, and viewing current network information. For Macs running System 6 and later (tested with System 6 and 7), I've created a Desk Accessory that uses this functionality.

BlueSCSI Wi-Fi Desk Accessory is free software. licensed under the terms of the ISC license. I also have some videos about its development and C programming on System 6 in general.

Latest Update: BlueSCSI Wi-Fi Desk Accessory 1.3 Released (2025-01-13)

BlueSCSI Wi-Fi Desk Accessory 1.3 has been released:

• wifi_da-1.3.sit (StuffIt 3 archive)
  SHA256: 40b49ef83b6512bde571171aa42e90419a8577efa895cfaeb19bf18a0c82d4de
  SHA1: b8fa941eb104c0f925436cc8fbc3018a3ded5b96

This update brings internationalization support for Macs running non-English installations, and a number of bug fixes.

Changes in this version:

• Fix a handful of bugs
• Add a log window that can be toggled by clicking on the signal icon
• Add localization for strings shown in the UI for Macs running non-English installations, which was initiated by Jean-Michel Durand
• Add Dutch translation by Axel Roest
• Add French translation by Jean-Michel-Durand (onegeekarmy)
• Add Italian translation by qwertyoruiop

Source Code

Source code and its THINK C project file are contained in the latest release archive, or it can be viewed on AmendHub.

Installation

On System 7 and above, drag the Wi-Fi suitcase onto the System Folder and click OK when asked to put it into the Apple Menu Items folder.

On System 6, launch the included Font/DA Mover utility. Click the Desk Accessory radio button at the top, then click Open… and locate and select the Wi-Fi DA suitcase. Select Wi-Fi from the list on the right side, then click « Copy « and Quit. A restart may be required.

Usage

After installation, a Wi-Fi item will appear in the Apple menu's list of Desk Accessories.

Once launched, the Wi-Fi DA will scan the SCSI bus to find a compatible DaynaPORT SCSI/Link device and then check to make sure it's actually a BlueSCSI emulated device.

 

The DA will then query the device for the current Wi-Fi network name and RSSI, and launch a background scan of nearby networks. Clicking on the network name will pop-up a list of networks which is populated once the background scan completes (usually within a couple seconds). If the selected network uses encryption and requires a password, the DA will prompt you for it.

 

After again asking the BlueSCSI device for its status, if it is now connected, the DA will update with the network name and RSSI:

As the Wi-Fi DA is left running, it will periodically poll the BlueSCSI device for its current network name and RSSI and update the window accordingly. At larger intervals, it will do a periodic background scan to keep its list of nearby networks up to date.

BlueSCSI is a trademark of Helgeson Technology Services, LLC and is used with permission.