No more upload when LINK is red

[dewagter]

When your ground station shows link-timeout (RED) after 5 seconds, then you can also not send any new command, flightplan, setting, ... to the plane...

When you have LEDs on your modem you can clearly see that as long as LINK is green, a flightplan command (e.g. standby) is being sent, but as soon as LINK goes RED, it does not send anything anymore.

Surely this is not intended? Do you know if this is a LINK / SERVER / GCS issue

[fvantienen]

Isn't this already implemented in link.ml? https://github.com/paparazzi/paparazzi/blob/master/sw/ground_segment/tmtc/link.ml#L306 and https://github.com/paparazzi/paparazzi/blob/master/sw/ground_segment/tmtc/link.ml#L325

[gautierhattenberger]

It seems to be a "feature" from 2007.
Question: what do we want ?

[dewagter]

In our case we absolutely do NOT want it: when a UAV is far away and
telemetry gets bad, it should at least ATTEMPT to still upload commands
(even tough they might not arrive: if you dont send them they will
certainly not arrive)

In which cases is it better not to send?

-Christophe

On Thu, Sep 4, 2014 at 11:29 AM, Gautier Hattenberger <
notifications@github.com> wrote:

It seems to be a "feature" from 2007.
Question: what do we want ?

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Reply to this email directly or view it on GitHub
#820 (comment).

[gautierhattenberger]

When an aircraft is landed and stopped, you don't want to send/need to send messages to it (PING, TRAFFIC_INFO, WIND,...).
I guess the correct way is to really kill the A/C (from GCS, server, link) when the user actually don't want to see it anymore, and continue sending otherwise.
Easy solution: make an option for link to set the timeout (0 for disabled)

[flixr]

Added the -ac_timeout parameter to link with a0bee87 and 25d975e, if you set it to zero, the aircraft should never be regarded as dead and uplink never disabled.
Is that enough to close this issue, or do you want add something to completely remove/kill an AC from the ground segment?

[gautierhattenberger]

@dewagter does the timeout fix enough to close the issue?

[gautierhattenberger]

closing due to feedback timeout