How wireless serial bridging works
A wireless serial bridge lets compatible software reach an RS232 device over a local WiFi connection instead of using a cable between the computer or mobile device and the serial port.
RS232 in plain language
RS232 is a point-to-point serial communication standard used by many kinds of equipment. A DB9 connector is common, but connector shape alone does not establish the correct pinout, signaling, or software compatibility.
The bridge in the middle
A WiFi-to-RS232 bridge provides a network connection on one side and an RS232 connection on the other. Compatible software sends and receives data through the bridge while the connected equipment continues using its normal serial interface.
Where GhostBridge GB-01 fits
GhostBridge GB-01 is Crux Resolve's assembled local RS232-to-WiFi TCP bridge. It creates its own WiFi access point and provides a fixed local connection at 192.168.4.1:35000.
The published verified automotive use is GhostTune with MicroSquirt hardware running MS2/Extra 3.4.4. Other compatible standard 3-wire RS232 applications can be evaluated against the same electrical, cabling, serial, and client-software requirements.
Why a local access point is useful
The bridge does not need a garage router, internet service, or cloud account for the working connection. A compatible phone, tablet, or computer can connect directly to the bridge.
The mobile device may report that the WiFi network has no internet connection. That is normal for a dedicated local serial connection.
What has to match
- The connected device must use a compatible RS232 electrical interface.
- The cable and pinout must be correct.
- The serial communication settings must match.
- The client software must be able to use the bridge's local TCP connection.
- The complete application must tolerate the normal timing and behavior of a wireless serial link.
This is why a product can accurately be called an RS232-to-WiFi bridge without claiming that every DB9 or RS232 device will automatically work with it.
MicroSquirt setup
For the published GhostTune workflow, see the step-by-step MicroSquirt WiFi setup guide.
For broader serial-device-server terminology and compatibility, see RS232 over WiFi.