In this video I dig into the new Xiegu G7250 and start reverse-engineering what’s happening under the hood. Using the radio’s USB serial connection, I capture the 115200 baud boot sequence, inspect STM32 debug output, identify GT911 touchscreen configuration data, watch the radio switch into post-boot binary traffic, and trace what happens when the VFO is turned. The goal is simple: figure out whether there’s a hidden shell, service interface, or other undocumented way into the G7250.
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I also explore the G7250’s Ethernet interface and network configuration, including the radio’s 192.168.3.199 address, configured port 50001, ping response, Nmap scans, and the mysterious `SLIP Client` message that appears during startup. Along the way I test serial BREAK, keyboard escape attempts, Linux SLIP networking, raw hex captures, and the radio’s exposed configuration files to see how much of the underlying STM32/Linux-style architecture can be uncovered without opening the case.
This is not a teardown or finished exploit. It’s the first round of hands-on Xiegu G7250 hacking and firmware investigation, with plenty of clues but no shell prompt yet. If you’re into ham radio hacking, SDR reverse engineering, embedded Linux, STM32 development, serial debugging, Ethernet protocol analysis, CI-V style traffic, or figuring out how modern software-defined radios actually work, this one goes straight down the rabbit hole.
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