Root Samsung Galaxy Tab S2 SM-T713

XDA instructions, with links to packages.

Enabling OEM replacement and debugging

1. System settings
2. About device
3. Tap "Build number" seven to ten times to open up the "Developer Options."
4. Developer options
5. Set "OEM unlock" ON.
6. Set "USB debugging" ON.

Install TWRP

1. Boot the tablet to download mode: power off, then press [Power + Home + Volume Down]
2. UN-check "Auto reboot" in Odin.
3. Flash TWRP with Odin.
4. Use [Power + Home + Volume Down] to exit Download Mode.
5. As soon as the screen goes blank, IMMEDIATELY press [Power + Home + Volume UP].

- This is a matter of timing. The XDA website says to move from [Volume DOWN] to [Volume UP] "whilst still holding the other buttons." That didn't work out too well for me.

- If you do not IMMEDIATELY go into Recovery Mode by pressing [Power + Home + Volume UP] at the right time, the system will boot. Then when you try to go into Recovery Mode, the bootloader will crash and normal Samsung Recovery Mode will take over.

- If you fail to make the IMMEDIATE transition from the Download session to the Recovery boot, then you have to go back to step #1 above.

Do a TWRP backup

This captures the system in a working condition. It takes time and space, but it is worth it. Don't ask me how I know. :o(

Flash SuperSu using TWRP

1. Copy the SuperSu zip file to some reasonable location on your tablet. I used ADB to place it /data . That made it easy to find with TWRP.
2. Copy the no-verity-no-encrypt_ashyx zip file to the sample place you put the SuperSu zip file.
3. Mount the data folder to make the zip files accessible.
4. Find the SuperSu zip file with the "Install" button, and flash it.
5. Find the no-verity-no-encrypt_ashyx zip file with the "Install" button, and flash it.

Boot into the system, if you can

I made a ton of mistakes the first time I tried this. I've written this as a script to follow in my second attempt. Stay tuned for further adventures in Bitland!