External Mode Open Protocol Connect command failed

Hello, everyone

I'm following examples of UAV Toolbox Support Package for PX4 Autopilots.

And i want to follow last examples(HITL).

https://kr.mathworks.com/help/supportpkg/px4/ref/qgc-hitl-example.html.html

I followed at task 2. and I did click Monitor & Tune button.

This error occurs.

The directory has only english.

I don't know why broken word appear.

What's the problem?

P.S. The example says connect serial 4 of pixhawk 1. and I have pixhawk 4.

I think serial 4 port of pixhawk 1 equals UART&I2C B port of pixhawk 4.

Is this right?

Answer 1

[Ankur Bose]

Hi,

As per the official documentation, the port named "Serial 4" exists only on Pixhawk 1 and not on Pixhwak 4. The example illustrates how to use a Serial port on Pixhawk to use for External Mode and provides example of Pixhawk 1. For Pixhawk 4, you need a separate serial port. As per documentation, you can use TELEM1 or TELEM2 port on Pixhwak 4 or External Mode which correspond to port lables /dev/ttyS1 or /dev/ttyS2. The port label is important as you need to configure the baud rate for this port in configuration instructions

[SeungWoo Park]

Hi, Thanks for your answer.

I thought

• UART&I2C B
• Telem1
• Telem2

ports are equal.

but it's not. It can be connected with only Telem2.

Thank you.