Re: [Paparazzi-devel] Re: Paparazzi Failsafe Features?

[Martin Mueller]

Hi Kurtis,

>       1) *Lost communication*: NOT built-in; depends on your modem and
>     protocol; can be implemented for XBee and Aerocomm that have RSSI
>     and ACK

This can be done on a higher level in the flight plan. Every message 
sent to the aircraft resets the 'datalink_time' variable that can be 
checked for in the flight plan. The ground station sends a 'ping' every 
couple of seconds. If no message is received for a given time the flight 
plan will deroute.

As an example the ingolfsskali plan has three global exceptions: max 
flight altitude, lost comm and minimum battery voltage.

> I think a Failsafe section on the wiki would be useful, since safety is
> of course very important, and an explanation of what failsafe systems
> are built-in to the code would be useful, as well as a way to configure
> them.

Can you do that?

Martin