Ok I have spent a few years making various versions of GUIs and tools for s400w based scanners which include Century CPS-A4WF, Halo Magic Scanner, ION AirCopy, ION AirCopy E-Post Edition, iScan Fly, Kaiser Baas WiFi Photo & Document Scanner, Mustek iScan Air / S400W, Transcription Patri Kun A4 Wi-Fi Portable Scanner. Heretofore referred to collectively as s4000w. Most of my work has been based around the command line driver for these same units by Bastel https://sites.google.com/site/bast3l78/s400w/main
More recently I have worked on Twain2AirScan to allow a Windows Twain or WIA Scanner to be shared over the eSCL protocol. Recently it came to mind to simplify one particular version of something I had previously written. As the Bastel command line driver I use in other projects handles communication to/from s400w scanner, and I had already created an eSCL (AirScan) interface in PHP the new product is NOT a GUI it is only an eSCL to Bastel s400 bridge. It receives and sends eSCL commands on one side and on the other side sends and receives commands to/from the s400w by way of the Bastel driver. End result? The end result is with the SANE-Airscan backend (not to be confused with the eSCL Back-end) these s400w scanners now become compatible with not only SANE , but the same code runs on Mac OSX_64 (with included Mac X86-64 Binary ) for native Mac scanning. There are Linux Binaries for x86_32, x86_64, Arm32(Pi 2 & 3). Sorry I have no M1 machine to make an M1 binary and cross-compiling seems daunting. This will be added to my http://ScannerShare.com page with Twain2AirScan that allows sharing a Windows TWAIN or WIA Scanner to eSCL/AirScan clients like Mac or Linux, Android, or Linux (using SANE-AirScan) at http://scannershare.com. For now however there is no direct link for the new s400w product but you can get the file by requesting it at the bottom of the page at http://scannershare.com Anyone with an s400w scanner and Linux or MacX86_64 is encouraged to test, please. To be clear this solution runs on Apache2 with PHP or other web server. PHP handles all the translation to/from eSCL/BastelS400W. It runs fine on 'localhost' and even supports automatic scanner detection via Bonjour..Avahi. It also simultaneously shares the scanner over your entire network using eSCL/AirScan . You will need a dedicated WiFi interface for the scanner, aside from whatever you use to connect to your normal network/Internet. Mark