The usual routine on a shop floor is shuffling a thumb drive back and forth between the office PC and the control, waiting for files to copy, then walking the drive back again. This build skips all of that. The gadget presents itself to the machine control as an ordinary USB stick, yet programs arrive over WiFi, dropped in from any browser on the shop network.
From what the maker has shared, the hardware is a new ESP32 board in a compact transparent enclosure that plugs into the controller's side panel. A small screen cycles between showing WIFI with a wireless symbol and USB with a trident icon. The storage is formatted FAT16 or FAT32 behind an MBR, the way these controls want it, and there is no app, no account and no cloud involved.
The detail that stands out to me is the split between two distinct modes. USB and WiFi modes were made for complex machines that dislike constant unplugging, and after switching back to USB mode the control sees a freshly plugged stick. Sending works from a browser on a Mac, Windows or a phone. The maker first built it for an embroidery machine, and since then it has run on a Kao Ming KMC-2000SD with a Fanuc 0i-MF, a Hartford with a Hartrol-Fanuc AI100, and a Haas VF-1 whose owner apparently never gave it back. That last one is the best endorsement in the whole story.
The open question is security. The maker's own take is that a WPA2 network is fairly secure, while also noting WiFi likely fails when ethernet does, and one former system engineer has said they would not trust the gadget to be secure. How a given shop's IT policy treats that is still an open question, and the maker has offered to answer questions about behavior on a specific control.