Re: [agl-dev-community] MQTT in agl

["Scott Murray" <scott.murray@xxxxxxxxxxxx>]

On Thu, 22 Oct 2020, RAKESH wrote:

> Hi Jeapo,
>
> Thanks for the help and sorry for the confusion caused.
> I am very new to Telematics domain i wanted to understand the working principles and features of it .
> I wanted to test or try telematics recorder. Can you please help me how can we use telematics recorder app to test and what is the  requirements for the demo?

The demo is quite simple, the recorder app reads vehicle and engine speed
from the CAN binding and sends them to a configured MQTT broker.  I'd
advise looking at the telematics-recorder application README.md file for
how to configure the broker, you will need to update the config in
/etc/xdg/telematics-recorder.conf with the information for the broker you
want to use:

https://git.automotivelinux.org/apps/agl-telematics-demo-recorder/tree/README.md

There is code to also read the current location from the GPS binding, but
a working GPS set up isn't necessary for recreating the demo (using GPS is
off by default).  For CAN, there is an expectation that a CAN adapter be
present, the telematics demo image has known working support for a couple
of different USB attached ones, and should work with others, though it may
take some tweaks.  If you do not have CAN hardware and still want to
experiment with the demo as is, you will have to rig up using a vcan
interface with the CAN binding.

Scott



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