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Pixhawk with 3DR Radio, Minimosd and connect to Raspberry Pi

Posted by Mike Jessup on February 3, 2015 at 11:48am

I have a 3DR radio, and a Minimosd connected to the two telem ports on my pixhawk. I want to add my raspberry pi 2 to the mix, and want to know how to connect all three at the same time. Would I have to route one through the raspberry Pi 2, or is there a way to split one of the telem ports to basically have three telem ports. 

Thanks for the info.

Mike

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Tags: pi, pixhawk, raspberry, telem
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Replies

  • Dmitry Prokhorov October 30, 2015 at 1:25pm

    Hi Mike,

    Going to do the same with ODroid C1 board. Wiring manual for PixHawk recommends to use separate telemetry ports for OSD and 3DR radio, but I split Telem1 port with y-cable packaged with my MinimOSD. It missed TX line from MinimOSD to PixHawk and this way MinimOSD unable to request MAVLink streams, so I just set appropriate params to meet MinimOSD demands:

    SR1_EXT_STAT = 2

    SR1_EXTRA1 = 6

    SR1_EXTRA2 = 6

    SR1_EXTRA3 = 2

    SR1_PARAMS = 0

    SR1_POSITION = 2

    SR1_RAW_CTRL = 2

    SR1_RAW_SENS = 1

    SR1_RAW_CHAN = 2

    So far it works ok and I have Telem2 free for MAVLink communication with ODroid.

    Hope it helps,

    Dmitry

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