Bluetooth test failed.

Currently, I am only powering the NRF5340 chip to test its performance. I have opened a standard example project located in the directory: nrf\samples\bluetooth\peripheral_uart—the renowned Bluetooth data transparent transmission example. I created a data packet and instructed Bluetooth to send it to test the data integrity. The pictures show the data packet I wrote, and the last picture displays the code I added in main:
k_timer_init(&adc_timer, adc_timer_handler, NULL); // Initialization: handler, expiration callback, stop callback (NULL)
k_timer_start(&adc_timer, K_MSEC(100), K_MSEC(100)); // Start immediately with a 100ms period.

Currently, there is an issue: after connecting via Bluetooth, the mobile phone does not receive the data. Could everyone please help me figure out which part of the code is causing the failure to receive data?
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