relay mode no work

[Yes21]

Issue submited by @roque-canales : rodizio1/EZ-WifiBroadcast#188 (comment)

EZW 1.6rc6

setup:
air pi zero awus036nha 2484
relay pi 3b with two awus036nha 2484 rx and relay on 2412
groud pi3b with one awus036nha 2412

Connecting screen on relay pi, we can see video and telemetrie (osd)

Connecting screen on ground pi we only se telemetry osd, no video black screen.

How to make it work?

I check with EZ WIFI Broadcast 1.5 and it works.
I'm not devloper, but could you please check for port this option to 1.6?

[Yes21]

And now the answer from Rodizio1 :

Thanks for testing and reporting back. I think I found the issue.

In the .profile script in the rx_function the tx_rawsock for forwarding the stream is started without first initializing the sharedmem for the tx_rawsock:

    if [ "$RELAY" == "Y" ]; then
                   ionice -c 1 -n 4 nice -n -10 cat /root/videofifo4 | /root/wifibroadcast/tx_rawsock -p 0 -b $RELAY_VIDEO_BLOCKS -r $RELAY_VIDEO_FECS -f $RELAY_VIDEO_BLOCKLENGTH -t $VIDEO_FRAMETYPE -d 24 -y 0 relay0 > /dev/null 2>&1 &
    fi

to fix it, add the sharedmem_init_tx like this:

    if [ "$RELAY" == "Y" ]; then
        /root/wifibroadcast/sharedmem_init_tx
        ionice -c 1 -n 4 nice -n -10 cat /root/videofifo4 | /root/wifibroadcast/tx_rawsock -p 0 -b $RELAY_VIDEO_BLOCKS -r $RELAY_VIDEO_FECS -f $RELAY_VIDEO_BLOCKLENGTH -t $VIDEO_FRAMETYPE -d 24 -y 0 relay0 > /dev/null 2>&1 &
    fi

Or copy over the attached .profile script file to /root/.profile (mind the dot in front of "profile")
profile-relay-fix.txt

Please let me know if it works (or if you need help making the changes).

@RespawnDespair I think we have to correct it in Open.HD.