[datalink] Set Xbee channel

[Fabien-B]

Configure the xbee channel at modem initialization.
Use option -ch to change xbee channel.
Default is 0x0C.

[dewagter]

Will it change the channel of the XBee if no option is given?

[Fabien-B]

In the current implementation, yes. I hadn't thought about this.
I will change it to change xbee channel only when it is specified.

[dewagter]

Great, thanks!

PS: what is the corresponding define to add to your airframe to change the airborne side?

[Fabien-B]

In one of my airframes I have this line (for channel 0x17):
<define name="XBEE_INIT" value="\"ATID3332\rATCH17\rATP1\rATBD6\r\""/>
But I think this only necessary stuff is :
<define name="XBEE_INIT" value="\"ATCH17\r\""/>
I may add a tag to the telemetry configuration to make ot easier.

[dewagter]

Thanks. Looks great. Info in config xml is also a good idea.

[gautierhattenberger]

will merge after testing on hardware

[Fabien-B]

Tested on hardware, it works !
The tests I made :
Aircraft on channel 0x10, modem on channel 0x0C:
launched without arguments : not working (as expected)
launched with arg -ch 0x10 : it works
Modem also on channel 0x10 , launched without argument : it works (so it don't change the channel if the argument is not given)