<![CDATA[Unable to communicate with / flash T5 v2.3.2 using T-U2T]]>Hi guys, I am trying to flash a T5 v2.3.2 (with 2.13 inch e-ink display). This requires the use of the T-U2T adapter.
Using the Arduino IDE, I select the ESP32 Dev module as board, and the T-U2T port (listed as USB-SERIAL CH340K in Windows Device Manager).
Whatever I try, I do not seem to get any communication going. The serial monitor does not show anything when pressing RST button, and uploading always fails due to "No serial data received".
Holding he BOOT button on the U2T and pressing RST while holding BOOT does not help me extra. Tried two devices and two cables to no avail (while I had success using those cables and devices on other devices).

Any idea how to get this working? Cheers!

]]>https://www.community.lilygo.cc/topic/503/unable-to-communicate-with-flash-t5-v2-3-2-using-t-u2tRSS for NodeMon, 18 May 2026 09:18:15 GMTMon, 07 Aug 2023 08:32:19 GMT60<![CDATA[Reply to Unable to communicate with / flash T5 v2.3.2 using T-U2T on Tue, 08 Aug 2023 07:07:31 GMT]]>@teastain2 the v2.3.1 version does have a CP2104, but the label on this board is clearly a v2.3.2.
When I plug the cable straight into the board, Windows doesn't show anything - no COM port or anything else. Device manager doesn't blink at all. The board just powers on.
I'll try to get in contact with LilyGo later today...

I was planning on uploading a sketch fron the Arduino IDE but PlatformIO is also installed and ready to go.
And I'd be surprised if my supplier is mistaken.. I had email contact with them about the board and they specifically indicated this difference between the two versions, as I asked them because there's no information online.

]]>https://www.community.lilygo.cc/post/939https://www.community.lilygo.cc/post/939Tue, 08 Aug 2023 07:07:31 GMT<![CDATA[Reply to Unable to communicate with / flash T5 v2.3.2 using T-U2T on Tue, 08 Aug 2023 01:18:27 GMT]]>@stevencellist The pics were very helpful.
The schematic says that it has a USB (which you can see) and an FTDI USB to UART chip, CP2104...so why does it need the TTGO T-U2T?
I think your supplier is mistaken!
LilyGO's product page:
https://www.lilygo.cc/en-ca/products/t5-v2-3-1
What IDE are you going to program it with?
You should be able to connect with a USB cable, no?

]]>https://www.community.lilygo.cc/post/938https://www.community.lilygo.cc/post/938Tue, 08 Aug 2023 01:18:27 GMT<![CDATA[Reply to Unable to communicate with / flash T5 v2.3.2 using T-U2T on Mon, 07 Aug 2023 17:08:03 GMT]]>@teastain2 I know the pain.. pretty stupid that they don't even list the product on their own page yet.
For reference the two requested pictures - but the eink display is glued fixed.
If you don't see anything obvious, I'll revert to mentioned GitHub & email, thank you!

IMG_20230807_181752.jpg IMG_20230807_181837.jpg

]]>https://www.community.lilygo.cc/post/937https://www.community.lilygo.cc/post/937Mon, 07 Aug 2023 17:08:03 GMT<![CDATA[Reply to Unable to communicate with / flash T5 v2.3.2 using T-U2T on Mon, 07 Aug 2023 16:08:47 GMT]]>@stevencellist Sorry, I cannot help you.
There are too many poorly documented versions with headache inducing conflicts and contradictions.
You should try the official GitHub repository and raise an "Issue" there and email them at
sales@lilygo.cc
Ask for Lewishe to respond.
I'm sorry but there were so many slightly different versions of your board!
I could to try and help if you could send me a clear close up image of YOUR unit on your table with your phone or your digital camera , both sides of the PCB but not the e-Ink unit.

]]>https://www.community.lilygo.cc/post/936https://www.community.lilygo.cc/post/936Mon, 07 Aug 2023 16:08:47 GMT<![CDATA[Reply to Unable to communicate with / flash T5 v2.3.2 using T-U2T on Mon, 07 Aug 2023 14:27:02 GMT]]>@teastain2 thanks for your response.
LilyGo released an update of this board, which I got from here: https://www.tinytronics.nl/shop/en/development-boards/microcontroller-boards/with-wi-fi/lilygo-ttgo-t5-v2.3.2-esp32-with-2.13-inch-e-paper-e-ink-display
This version does require the T-U2T adapter to program the board. I tried the same BOOT & RST sequence, to no avail.

I currently do not have another TTGO board within reach to test the T-U2T adapter, but I am able to communicate with Heltec boards through USB-C on the same device & cable. Another U2T adapter I got in the same order did work when I tested it somewhere else (currently not within reach).

]]>https://www.community.lilygo.cc/post/935https://www.community.lilygo.cc/post/935Mon, 07 Aug 2023 14:27:02 GMT<![CDATA[Reply to Unable to communicate with / flash T5 v2.3.2 using T-U2T on Mon, 07 Aug 2023 14:23:11 GMT]]>@stevencellist Is this:
https://www.lilygo.cc/en-ca/products/t5-4-7-inch-e-paper-v2-3?variant=42400829898933
the model you have?
If so, you do not need a T-U2T, just a USB cable.
The boot sequence is:
Press and hold Boot, press and release Reset, then release Boot.
Do you have success with other boards, using USB upload and this same cable?
-Terry

]]>https://www.community.lilygo.cc/post/934https://www.community.lilygo.cc/post/934Mon, 07 Aug 2023 14:23:11 GMT