SenseCAP One - Timeout error

When I try to connect, the mbpoll show error: Timeout Error.

What is the problem?

My configuration:

9600 baud
8 data bits
None parity
1 stop bit
Response timeout 1000
Delay 200
Mode RTU

Hello, how is your hardware setup?

Hi, thanks for the reply.
I did not understand what exactly you are asking me

Other test,
if try to send char " ? " don’t get any reply message.

Oh I meant to say how did you connect the SenseCAP One with your computer/Raspberry Pi?