I have added shell console and its support into my nrf54l15 device and it worked well like below.

But now I want to use a python script to run this "bt" shell command in my device, how can I do this?
These below are my python script now.
I tried to use jlink.rtt_write(0, b"bt") to send a "bt" shell command, but I seemed to get nothing response. I think it connect successfully becaues it print the "successfully" log.BTW, please ignore the device NRF52840_XXAA in the script even if my device is actually nrf54l15.
<test.py>
import pylink
jlink = pylink.JLink()
jlink.open()
jlink.set_tif(pylink.enums.JLinkInterfaces.SWD)
jlink.connect('NRF52840_XXAA')
jlink.rtt_start()
print('Successfully connect to device')
jlink.rtt_write(0, b"bt")
response = jlink.rtt_read(0, 16)
print("LOG", response)