NOTE: I highly recommend AGAINST trying to fit the AMOLED version into the existing T-Display cases.

I just bought one, got it working great with a sketch from Volos https://www.youtube.com/c/VolosProjects, and installed it into one of the T-Display cases I have for my other regular T-Display devices.

It did seem to fit, so I didn't think much until powering it up... But now display only had a thin line on one end (by the buttons). OH NO!!

I took it out of the case and realized that because the acrylic covers the buttons there was way too much pressure on everything. And It somehow broke something in the screen or connector, as now it is simply dead, no image, no line, nada...

The ESP32 still works and I can tell it is running the sketch as one of the buttons toggles the green LED (which still works). But as the other adjusts the brightness (which of course being AMOLED is not a separate backlight), thus since the screen is dead that button does nada.

I contacted support about a replacement screen or something, but have been just getting runaround as no one seems to understand English well enough... They grab one descriptive comment and run with it as if it was the whole issue. 😞

So I am out about $45 CAD after a wopping one hour of use (including programming) and reluctant to purchase anything more from Lilygo due really questionable support options. Oh well... I will just stick with the regular T-Displays that I have I guess.

@djmason mine died pretty fast as well.

The Lilygo folks were resistant to replacing it, but they offered to send a replacement screen or a discount on a 2nd one. I considered that a fair move.

@teastain2 as you can see from the pic I posted "normal" version has black wire (-?) on the left and red wire (+?) on the right. The "F" version of the connector has polarity reversed.

@thebeardedgarage Good to know!
Thanks -Terry

Hello Terry

thank you for answering, I fear that this will not be of much use because I have, as an ex,
uploaded: ESPNOW_for_T_Display
the answer is :

ESP-ROM:esp32s3-20210327 Build:Mar 27 2021 rst:0x15 (USB_UART_CHIP_RESET),boot:0x8 (SPI_FAST_FLASH_BOOT) Saved PC:0x42073a4a SPIWP:0xee mode:DIO, clock div:1 load:0x3fce3808,len:0x44c load:0x403c9700,len:0xbe4 load:0x403cc700,len:0x2a68 entry 0x403c98d4

and the screen remains black

pascal

Hi! I am encountering the same issue! I have replaced the # defined for the modem from TINY_GSM_MODEM_A7670 to TINY_GSM_MODEM_SIM7600, which got the sketch to compile, but the modem doesn't get any GPS reading. This post is the number one result on Google, but sadly, there isn't much help here yet. As you've pointed out, I have a feeling it's a TinyGSM library issue, but I am kinda lost on debugging it from here. It'd be great if someone got the GPS working and found this post sometime in the future...

@hpro This only a community site, with mostly me.
You could try their GitHub repository and raise an issue:
https://github.com/Xinyuan-LilyGO/T-Display-S3/issues
Lithium batteries do not lose voltage as they are used up, They all of a sudden die!
My suggestion was to calibrate the voltage at USB conditions and anything less than that, accounting for ADC drift would indicate that it was on battery only, no USB.
-Terry

@teastain2

Thanks, I realize that I can change the definitions of Wire to the other pin, but then would the Touch display not function appropriately?

I would prefer to define GPIO2 and GPIO3 as Wire1 and not Wire, and have the touch display use that interface. I would then define Wire as the new pins (as per your example above).

Is there a software option to do this? I am using some libraries that are hardcoded to Wire, and don't want to manually change them myself.

If not possible, the Mutex method around the lv_task_handler() seems to work well - the board has been running for about 2 weeks with no issues, and no bad data.

@francis Arduino code is C, C++ and all you need to do is #include Arduino.h.
and 'undo' some of your structured 'ini' business in IDF.
Use the listed Arduino libraries.
It is too simple, I think.
-Cheers

Yes, crystal burrs cause the problem.It has now been fixed in the latest version

@errolt
https://github.com/LilyGO/TTGO-ESP8266-0.91-SSD1306/blob/master/t12_8266_v1.3.pdf
The schematic is here

@andyclap When the battery is depleted, the noise source is from the DCDC boost inductor on the board, thanks for your feedback, I will discuss the solution with my team.
Recommendations on power consumption:

When starting T-Higrow, it is recommended to reduce the main frequency of ESP32 to 160, or lower, if not using WiFi, it is recommended to lower to 80, 40MHz If WiFi transmission is used, it is recommended to reduce the number of transmissions, and then package and send the data uniformly. The number of acquisitions can remain unchanged.

Thanks for your feedback.

@scheeri It can be connected to 5v, but after connecting to 5v, you cannot plug in USB at the same time.

@caz that's great , if you have any other questions in use, please feel free to contact us.

@kreier Thanks for helping out with this. I saw your PR. Looks like they’re waiting for an update from you. https://github.com/pidcodes/pidcodes.github.com/pull/827#discussion_r1135991673

HTB19DIoaovrK1RjSszfq6xJNVXaq.jpg
D1 and D2 pins are I2C

@gfaman said in T5 4.7 e-paper missing library::

hal/rmt_ll.h:

hey, I just had the same problem. just comment this header, and everything will compile correctly.
arduino already have these headers.

TTGO LoRa32 V2.1-1.6 is the same as TTGO LoRa32 V2.1-1.6.1, we just changed the silk screen on the board. The OLED on the board uses (SDA)21 , (SCL)22 There are schematic diagrams and reference codes in our warehouse, please see here Link

@ajlenze Only ESP32 can be found in the Arduino Boards Manager. You need to install ESP32. And C3 is a derivative of ESP32. After installing ESP32, you can select the C3 subclass chip in the board

Cheers!
Terry