Problems connecting and controlling the SpeedyBee F405 V3 drone via terminal and Mavproxy: Questions about SERIAL ports and configuration"

Dear community!

I’m using a SpeedyBee F405 V3 flight controller and I’m having trouble connecting and controlling the drone via terminal and Mavproxy. My goal is to use the terminal to enter commands and receive responses from the drone. I have already configured the SERIAL ports and parameters as per Documentation link but I am not getting the expected results.

Here are some specific questions:
What parameters of SERIAL ports are recommended to be used for entering commands and outputting responses through the terminal?

Do I need to set the same values ​​for SERIAL0_PROTOCOL and SERIAL6_PROTOCOL or can they be different?

Can using SERIAL0 port create conflicts when working with SERIAL6 through the terminal?

Are there specific steps or tips for setting up Mavproxy to work with the SpeedyBee F405 V3 controller via terminal?

Please provide specific settings or advice for using Terminal and Mavproxy with the SpeedyBee F405 V3 controller.

I set the time, because the pi3 after reboot resets the time.
I also have this information:


pi3@raspberrypi:~ $ sudo -s
root@raspberrypi:/home/pi3# mavproxy.py --master=/dev/serial0 --baudrate 115200         --aircraft MyCoptrer
Connect /dev/serial0 source_system=255
no script MyCoptrer/mavinit.scr
Log Directory: MyCoptrer/logs/2023-11-09/flight5
Telemetry log: MyCoptrer/logs/2023-11-09/flight5/flight.tlog
Waiting for heartbeat from /dev/serial0
MAV> Detected vehicle 1:1 on link 0
online system 1
STABILIZE> Mode STABILIZE
mode RTL
STABILIZE> status
STABILIZE> Counters: MasterIn:[15] MasterOut:13 FGearIn:0 FGearOut:0 Slave:0
MAV Errors: 0
None
14: HEARTBEAT {type : 2, autopilot : 3, base_mode : 81, custom_mode : 0, system_status : 3, mavlink_version : 3}
1: TIMESYNC {tc1 : 0, ts1 : 4291046681001}

Serials setup had view
SERIAL_PASS1,0
SERIAL_PASS2,-1
SERIAL_PASSTIMO,15
SERIAL0_BAUD,115
SERIAL0_PROTOCOL,2
SERIAL1_BAUD,115
SERIAL1_OPTIONS,0
SERIAL1_PROTOCOL,33
SERIAL2_BAUD,57
SERIAL2_OPTIONS,0
SERIAL2_PROTOCOL,23
SERIAL3_BAUD,38
SERIAL3_OPTIONS,0
SERIAL3_PROTOCOL,-1
SERIAL4_BAUD,38
SERIAL4_OPTIONS,0
SERIAL4_PROTOCOL,-1
SERIAL5_BAUD,115
SERIAL5_OPTIONS,0
SERIAL5_PROTOCOL,16
SERIAL6_BAUD,115
SERIAL6_OPTIONS,0
SERIAL6_PROTOCOL,2

For connection with pi3 I use Serial 6

Thank you for your help.