Practical engineering
Products are built around real bench, garage, embedded, industrial, and serial-connected workflows rather than features added only for a specification sheet.
Veteran-Owned Small Business · Illinois, USA
Connect legacy hardware to modern devices.
Crux Resolve builds local wireless serial connectivity hardware and specialized mobile software for automotive, embedded, industrial, and legacy systems. GhostBridge puts standard 3-wire RS232 on WiFi; GhostTune brings supported ECU tuning to iPhone and iPad.
// Products
Two products. Two clear jobs.
GhostBridge provides local wireless RS232 connectivity for compatible 3-wire serial equipment. GhostTune provides mobile ECU tuning for explicitly supported engine-management systems.
// Wireless serial connectivity
GhostBridge v1.0 (GB-01)
A compact assembled local WiFi-to-RS232 TCP bridge for compatible standard 3-wire serial equipment. No router, cloud service, or internet connection required.
Available now · $89+$8 U.S. shipping
// Mobile ECU tuning software
GhostTune
ECU tuning for iPhone and iPad with table editing, live data, tune management, diagnostics, and guarded ECU writes. Verified on MS2/Extra 3.4.4.
Available now on the App Store
Looking for wireless RS232?
See how GhostBridge connects compatible serial equipment over a direct local WiFi link.
// Start with your problem
What are you trying to connect?
You do not need to know whether you need a “serial device server” before you arrive. Start with the equipment or software problem and follow the path that fits.
I need to make a 3-wire RS232 device wireless
Start with the serial-device-server path, then review the current GhostBridge GB-01 interface, limitations, price, and ordering options.
See the WiFi serial device server path →I have a device, but I am not sure the interface matches
Send the manufacturer, model, serial settings, pinout, flow-control requirements, and host software you know before deciding whether to order.
Check my device →My old software still expects a COM port
See whether your software can connect directly to TCP or needs a compatible virtual COM-port layer between it and the serial device server.
Compare TCP vs virtual COM →I need repeat deployments or application-specific behavior
Start with the hardware interface and project requirements when you need custom firmware, repeatable defaults, or product integration.
Discuss an OEM application →// Our approach
Purpose-built tools. Clear boundaries. Practical support.
Crux Resolve is the parent engineering brand. GhostBridge serves serial connectivity, while GhostTune serves supported ECU tuning workflows.
Local control
GhostBridge creates a direct local WiFi connection for serial traffic with no cloud relay, while GhostTune is designed around explicit ECU write safeguards.
Direct support
Questions about serial compatibility, ordering, setup, privacy, and product support are handled directly through Crux Resolve.
// From the technical library
Start with the connection problem.
Practical guides cover RS232 over WiFi, transparent TCP-to-serial bridging, mobile ECU tuning, and connection troubleshooting.
Connect RS232 Equipment Over WiFi
How a local WiFi-to-RS232 bridge connects legacy serial hardware to modern computers, phones, tablets, and embedded clients.
Explore RS232 over WiFi →How Wireless Serial Bridging Works
A plain-language explanation of local TCP-to-RS232 bridging, transparent byte relay, and why the bridge is only one part of compatibility.
See how the connection works →Can You Tune a Car From Your Phone?
What real mobile ECU tuning can do, what hardware it requires, why compatibility matters, and where a laptop still makes sense.
Read the guide →// About Crux Resolve
A veteran-owned small business building connected tools.
Crux Resolve LLC is an Illinois veteran-owned small business building wireless serial connectivity hardware and specialized mobile software for automotive, embedded, industrial, and legacy systems.
Crux Resolve is the parent brand; GhostBridge and GhostTune are separate product families beneath it.