当我尝试启动 dji_sdk sdk.launch 时出现此错误
dji@manifold2:~/Desktop/M210_ws$ roslaunch dji_sdk sdk.launch
... logging to /home/dji/.ros/log/b1f94636-ef16-11e9-bd30-74da38ebc18f/roslaunch-manifold2-6454.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
started roslaunch server http://manifold2:42235/
SUMMARY
========
PARAMETERS
* /dji_sdk/align_time: False
* /dji_sdk/app_id: 1079440
* /dji_sdk/app_version: 1
* /dji_sdk/baud_rate: 115200
* /dji_sdk/enc_key: 39d353a8e9ad01b6c...
* /dji_sdk/serial_name: /dev/ttyTHS0
* /dji_sdk/use_broadcast: False
* /rosdistro: kinetic
* /rosversion: 1.12.13
NODES
/
dji_sdk (dji_sdk/dji_sdk_node)
auto-starting new master
process[master]: started with pid [6464]
ROS_MASTER_URI=http://localhost:11311
setting /run_id to b1f94636-ef16-11e9-bd30-74da38ebc18f
process[rosout-1]: started with pid [6477]
started core service [/rosout]
process[dji_sdk-2]: started with pid [6487]
STATUS/1 @ init, L56: Attempting to open device /dev/ttyTHS0 with baudrate 115200...
ERRORLOG/1 @ _serialOpen, L181: cannot open device /dev/ttyTHS0
ERRORLOG/1 @ init, L61: ...Failed to start serial
ERRORLOG/1 @ sendData, L423: Port closed.
ERRORLOG/1 @ sendData, L427: Open Protocol cmd send failed, send_len: -1 packet_len: 19
ERRORLOG/1 @ getDroneVersion, L1503: Drone version not obtained! Please do not proceed.
Possible reasons:
Serial port connection:
* SDK is not enabled, please check DJI Assistant2 -> SDK -> [v] Enable API Control.
* Baudrate is not correct, please double-check from DJI Assistant2 -> SDK -> baudrate.
* TX and RX pins are inverted.
* Serial port is occupied by another program.
* Permission required. Please do 'sudo usermod -a -G dialout $USER' (you do not need to replace $USER with your username). Then logout and login again
ERRORLOG/1 @ activate, L1387: Unable to initialize some vehicle components![ERROR] [1571121642.979869864]: drone activation error
[ERROR] [1571121642.980001324]: Vehicle initialization failed
所以现在我用什么来连接，因为我使用的是只有 UART0 和 N/A 的歧管 2c，建议使用 USB-TTL，但我应该输入什么波特率和序列名？