With this piece of code it is difficult to assess the problem.
But why are you activating indications and notifications?
Some data can only be sent if there are indications or notifications.

Good reference about BLE:
https://punchthrough.com/resources/

I think this site could be useful.

https://randomnerdtutorials.com/projects-esp32-cam/

Check all connections between the LCD and the ESP32.
There may be an incorrect connection.
Measure the 5V supply on the LCD. Make sure it is suitable.

Reference to read:
https://randomnerdtutorials.com/esp32-p ... nce-gpios/

I am using the ESP32 WROOM-32 module on our PCB and we are using our board on main power of 12V DC & on backup battery with 3.3V - 4.2V DC supply.

Your 3.3V regulator is probably faulty or not suitable for supplying the required current.

I suggest you read these tutorials:

https://randomnerdtutorials.com/?s=bluetooth

Hi, Reading at " SPI Flash and External SPI RAM Configuration " topic: https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-guides/flash_psram_config.html Important 120 MHz DDR mode is an experimental feature. You will only see it when: CONFIG_IDF_EXPERIMENTAL_FEATURES is enabled With a...

Hi EUA,
Test suggestion - connect a jumper (wire) between the two pins externally. What do you think about this?

Hi EUA, I suggest you take a look at these links https://github.com/espressif/arduino-esp32/blob/master/docs/source/api/ledc.rst https://github.com/espressif/arduino-esp32/blob/master/docs/source/api/i2s.rst Pin setup Pins can be changed in two ways- 1st constants, 2nd functions. By default, the pin...

Hi Cardan,
I think this example can be useful:
https://randomnerdtutorials.com/esp32-c ... timestamp/

Hi Extra....

Some valuable information here about ESP32 Arduino I2S: (Github) https://github.com/espressif/arduino-esp32/tree/master

arduino-esp32/docs/source/api/i2s.rst
arduino-esp32/tools/sdk/esp32/include/driver/include/driver/i2s.h
arduino-esp32/libraries/I2S/src/I2S.h