tja, no success. I see data being transmitted on my little USB-To-Serial board (has a tiny LED for it), but no response to anything. No ESC smashing, no nothing.
On the pull-ups: The displays PCB doesn’t have any, my USB-To-Serial board (using a FT232BL) also doesn’t have any. However, if I measure the TX and RX pins on the USB-To-Serial board, they’re both pulled high, but again: No resistors on that board on the TX and RX lines. I guess the FT232BL has some internal pull ups?
I ran a port scanner on the display and the only open TCP port is 6668, nothing else. But I can’t even telnet to it, very weird…
I leave it back to the experts / blackadder to find something. If I can provide any help in measuring or testing anything: More than happy to do so! Currently I have this thing here laying around for nothing, could also just go to trash in that state, as it’s useless without an HA dashboard
I got a device that was sold as “NSPanel Pro” on Aliexpress, but wasn’t one :/. These things keep piling up here…
This time Linux again, but strangely with an open ADB debug. I can connect via ADB wireless and I do get a shell, but I am unsure where to go from there…
Of course! My device seems to be quite hacking friendly. Not only is ADB debugging active, RX/TX ports are also clearly marked (though I didn’t hook it up, yet) and it seems that an micro usb port could be easily added. If I am not mistaken, there are even debug points for the usb port…
Got the console working via serial and got the same output as yours, but that’s all. No inputs, no way to interact with the PCB. Tried pressing ESC/ENTER but nothing seemed to work. If you ever find a way to open a ADB shell please let us know!
Do someone knows if T6E is upgradable with NSPanel Pro firmware?
I tried this app GitHub - seaky/nspanel_pro_roottool_apk but it crashes while starting installing firmware…
My idea was that I could then “somehow” use this tablet as a control unit. I had and still have no intention of using the Zigbee hub - just the tablet as a control unit.
Just to share some of what I found regarding this type of devices, the following links have some info about how to disable Tuya Apps, install Launcher, update WebView and Proximity Sensor.
Hey @mattmon! I finally had/have some time to work on this. Got rkdeveloptool compiled, now wanted to get it into “loader mode” but I don’t have a button on my PCB You say “press the button on the pcb while powering on to enter loader mode” See the pics I posted of my PCB a few posts up… What is that button effectively doing? I guess what u said in the earlier post: “By shorting the emmc clock pin to ground.”?
I would need to find the emmc pin then and see if I can hook up a button to it
There are two pad pairs made for a button. Bottom pads are indeed GND, but no idea what the upper pads are… I tried just soldering some jumper wires to them to bridge the pads, but:
Bridging the left one before you connect it to USB doesn’t make it boot at all. bridging it right after u connected USB doesn’t do anything different to the boot / still doesn’t seem to enter any “loader mode” and “rkdeveloptool ld” says “not found any devices!”
Bridging the right one doesn’t do anything at all…
There’s also a lot of empty pads around them. At least a diode and probably some (pull up/down) resistors? So even if that would be the right pads, maybe still missing some resistors?
Is there any visual difference in boot that I could actually recognize that it boots into “loader mode”?
OK, tiny bit of progress… I think a main issue was that I was trying the “rkdeveloptool” under WSL, as I don’t have a native Linux machine, “just” Windows. But apparently there is a Windows version of that tool: Rock3/install/rockchip-flash-tools - Radxa Wiki
So @mattmon I would greatly appreciate some ideas / help / assistance. Maybe you have an idea? Can also meet on Discord and try to find a way to dump the firmware and flash yours?
Not sure how much helpful the info below is but in case you have missed it I am sharing it.
Also, check this document (English instructions but the RKDevTool in Chinese). Tuya Smart Panel Firmware Upgrade Instructions.pdf
@ezcGman This video walks you through how to use the tool to extract different partitions of the device. Once you have those partitions extracted you can do whatever you need and (modify them). It has been long time since I used Android flashing tools but just in case you need to get your hands busy this is the way to go… how to bacup rk tablet ROM Dumper Tool
Note: the device has to be powered using the mains power (L/N) while the USB cable connected to your Windows device.
to find something. If I can provide any help in measuring or testing anything: More than happy to do so! Currently I have this thing here laying around for nothing, could also just go to trash in that state, as it’s useless without an HA dashboard 
You say “press the button on the pcb while powering on to enter loader mode” 
