What are the Serial Ports Connected to?

Navio / Edge Hardware
1

So in the /etc/default/arducopter file you can set the telemetry options but I was hoping to find some more information because I am looking at forwarding Mavlink data from the GCS through a USB port on the Navio2 to a second raspberry pi.

In the options menus you have your TELEM# options like so:
TELEM1="-A udp:127.0.0.1:14550"

We set our radio to 115k baud rate and it seemed like the way to do this was to set our second telem as an “-A”
TELEM2="-A /dev/ttyAMA0" since I wanted to use the UART port on the Navio2 to connect our telemetry radio with. However now I want to have telemetry data received by the radio on TELEM2 to be sent to a USB port to be forwarded to a second raspberry pi.

This leads to my system not connecting to my GCS. So I have a question as to which Telemetry is what Serial# in the parameters list?

Is it based on the lettering? like:
“-A” is for Serial0,
“-B” Serial1
“-C” Serial2
“-D” Serial 3
“-E” Serial 4

In that case how would i set a Baud rate besides my default one for that option as it says that “-A” is 115k baud rate while “-C” is 57k

On another note, how would I then get this mavlink data forwarded out the USB port.
I noticed in Mission Planner I have a Serial_PASS1 and Serial_PASS2 option so if I set one serial port as the input from my radio module and the second as my USB port would that forward the telemetry data out that USB port?

3

Hi Brandon,

You need to use different flags for each individual TELEM parameters. -A flag is usually used for TCP or UPD connection. For your UART radio, you can choose -C or -D. Your path to the serial connection looks fine.

Yes, you got it right. If you need a more detailed reference, there’s a part of the guide describing the mapping between switches and ports.

Mission Planner needs a direct connection with the port. So, it will receive the data on a USB port in case there’s a connected telemetry device.

2 Likes
4

How would I go about setting a different baud rate for each serial port in the /etc/default/arducopter file without having to change it in the GCS?

5

Hi Brandon,

The baud rate on Navio2 is controlled by parameters in the GCS app. It won’t be possible to change it in the launching file.

6

Ah ok
Thank you.

1 Like
8

This topic was automatically closed 100 days after the last reply. New replies are no longer allowed.