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
Modern tools for machines that weren’t built for modern devices.
Crux Resolve builds specialized software and practical connectivity hardware for automotive, embedded, industrial, and legacy systems. GhostTune brings supported ECU tuning, live data, diagnostics, and tune management to iPhone and iPad. GhostBridge provides a simple local WiFi path for compatible 3-wire RS232 equipment when wireless serial transport is the job.
New: GhostTune for Android is in beta testing with Bluetooth SPP, BLE UART and USB-C OTG serial connection options. See Android beta progress →
// Android ECU tuning · Beta in testing
Looking for a MicroSquirt tuning app for Android?
GhostTune is expanding to Android. WiFi, Bluetooth Classic SPP, BLE UART, and USB-C OTG serial connectivity are being evaluated. The Android beta is not a public Play Store release; USB serial is currently a read-only pilot.
// Products
Two products. Different jobs.
GhostTune is the mobile ECU-tuning software. GhostBridge is a local WiFi-to-RS232 transport device. Choose the product that solves the actual problem in front of you.
// Mobile ECU tuning software
GhostTune
Tune, monitor, and diagnose supported aftermarket ECUs from iPhone and iPad with table editing, live data, tune management, diagnostics, and guarded ECU writes. GhostTune costs $35 on the App Store.
iOS app · $35 on the App StoreAndroid beta: SPP, BLE, WiFi and USB OTG under evaluation.
// Local serial connectivity
GhostBridge v1.0 (GB-01)
A compact transparent TCP-to-RS232 bridge for compatible standard 3-wire serial equipment. It moves serial traffic over a direct local WiFi link without a router, cloud service, or internet connection.
Available now · $50+$8 U.S. shipping
// Verified GhostTune setup
Need the published wireless setup for GhostTune?
GhostTune is the tuning application. For the currently published MicroSquirt workflow, it connects through a compatible local WiFi-to-RS232 bridge. GhostBridge GB-01 is the Crux Resolve bridge designed and verified for that job; another bridge still has to meet the complete communication requirements.
iPhone / iPad → compatible local WiFi-to-RS232 bridge → MicroSquirt · MS2/Extra 3.4.4
// Our approach
Purpose-built tools. Clear boundaries. Practical support.
Crux Resolve is the parent engineering brand. GhostTune serves supported ECU tuning workflows; GhostBridge serves local serial transport when compatible RS232 hardware needs a wireless link.
Local control
GhostTune is designed around explicit ECU write safeguards and local ECU communication, while GhostBridge provides a direct local WiFi path for compatible serial traffic with no cloud relay.
Direct support
Questions about GhostTune, GhostBridge, compatibility, ordering, setup, privacy, and product support are handled directly through Crux Resolve.
// From the technical library
Learn the software, compatibility, and connection details.
Start with mobile tuning and ECU compatibility, then use the serial-connectivity library when the physical communication path is the part you need to solve.
How to Tune a MicroSquirt From an iPhone
A practical look at the supported mobile tuning workflow, what the app handles, what the connection requires, and how to verify the setup before making changes.
Read the mobile tuning guide →GhostTune Android: Bluetooth, USB OTG and MicroSquirt
See the Android beta status, connection methods, USB serial adapter families, and what remains under verification before release.
Explore the Android beta →Connect RS232 Equipment Over WiFi
When serial transport is the actual problem, this guide explains local WiFi-to-RS232 bridging, compatibility limits, and the role of a transparent serial device server.
Explore RS232 over WiFi →// Serial connectivity resources
Working with RS232 equipment?
This is the secondary hardware path for visitors whose actual problem is moving compatible RS232 traffic over WiFi. Start with the equipment or software requirement rather than the GhostBridge product name.
I need to make a 3-wire RS232 device wireless
Use this commercial path when you already know you need local WiFi connectivity for compatible 3-wire RS232 equipment, then review GhostBridge GB-01 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.
Explore OEM RS232 WiFi options →// About Crux Resolve
A veteran-owned small business building practical software and hardware.
Crux Resolve LLC is an Illinois veteran-owned small business building specialized mobile software, practical connectivity hardware, and engineering tools for automotive, embedded, industrial, and legacy systems.
Crux Resolve is the parent brand. GhostTune is the mobile ECU-tuning product family; GhostBridge is the local serial-connectivity hardware family.