Samsung Galaxy Tab 3 10.1 Wi-Fi (samsung-santos10wifi)

Contributors

 * Ungeskriptet

How to enter flash mode
Hold +  when the device is off to enter download mode.

Installation
Put device in download mode and then execute. Then reboot the device in download mode again and execute. For a full tutorial, please see this post by Ungeskriptet at XDA-D: https://forum.xda-developers.com/t/native-linux-postmarketos-on-tab-3.4245067/post-84781947

UART
UART can be accessed with a special Micro-USB cable that puts a 619kΩ resistor between the ID and GND pin. The memory address for UART should be.

Accessing S-Boot
Boot into download mode first, then press Volume Down to cancel and immediately hold Volume Up on the tablet and enter in your serial console after the screen goes black until you see the  prompt.

If you only want logs from the boot process, don't hold down enter in the serial console.