Personal Wireless Grid - Serial Adapter Blueprint Pack
Publicly online since 2010 · U.S. patent applications since 2012 · inventions offered since 2014. The work of Christopher Gabriel Brown, independently documented.
Personal Wireless Grid makes wired peripherals cordless. Fit a small adapter to any wired device — a USB drive or printer, a bench instrument, an audio source — and it joins your Wi-Fi. Your PC still sees it exactly as if it were plugged in locally; the cable is simply gone. Put your gear where you need it, not where its cord reaches.
Wireless serial for the wired instruments you already own. Your bench multimeter, your CNC controller, your GPS, your scale — each one becomes a virtual COM port on your personal PC.
In plain English
Many industrial and lab instruments still speak over a
wired serial cable. This adapter sits on the instrument’s serial line,
talks to your personal PC over Wi-Fi, and (paired with a small free
OS-level shim) shows up as a normal COMx port on Windows or
/dev/ttyVx on Linux. Your existing software does not need to
change a thing.
In technical terms
An ESP32-C3-based UART proxy with a software-selectable RS-232 / RS-485 / TTL front end and the standard PWG framing. The host opens a local TCP port; tools like com0com (Windows) or socat (Linux/macOS) bridge that port to a virtual COM device so legacy tools connect transparently.
- ESP32-C3 + Wi-Fi.
- 3.3 V/5 V level-shift for the device side.
- Selectable RS-232 transceiver (MAX3232) or RS-485 (MAX485) variant.
- Standard 4-pin instrument header (V+, TX, RX, GND).
- Same PCB family as the UniPhi Serial Adapter Card.
What is included (deliverables)
- KiCad schematic (RS-232 and RS-485 variants).
- PCB layout specification.
- ESP32-C3 PWG-mode firmware source.
- Bill of materials.
- Quick-start guide: pairing with com0com (Windows) and socat (Linux).
Design target
115.2 kbps line speed with under 50 ms round-trip on a local Wi-Fi network. Performance values are design targets, not guarantees.
How to order
Email- and postal-order only — no phone, no brokers. USA-based buyers, USD only. Delivery is by encrypted email link upon payment confirmation.
- Email: christopher@cri-one.com · crioneaka@outlook.com
- Postal: Christopher Gabriel Brown · 1341 Wellington Cove · Lawrenceville, GA 30043-5255 · United States
Personal Wireless Grid is patent pending (U.S. Utility Application No. 19/717,706, filed 06/24/2026, inventor: Christopher Gabriel Brown; the same patent application also covers the related UniPhi product line). Purchase grants use of the software and design files included in this listing for the buyer’s own build — it does not transfer, assign, or license the underlying patent-pending invention. The patent and all derived rights are retained by the inventor.



