Flash the ESP32-P4 application straight from your browser. Connect the Tab5 by USB-C and hit the button. Chrome or Edge on desktop only (Web Serial).
One flash, that's it. This installs the ESP32-P4 app. The on-board ESP32-C6 radio firmware is bundled inside it and is flashed automatically, over the air, on the first boot — the Tab5 shows an ARMING RADIO screen for ~15 s, then reboots once into Slave I. No microSD, no second step.
Full details: INSTALL.md.
First-boot tip: if the touchscreen is unresponsive right after flashing, press the reset button (or power-cycle) once — a known one-time quirk of flashing over USB.