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Can I specify what channel to use (0-7) when you do this: http://192.168.1.xxx:8073/?ext=ft8,28074&mute ?
I want to keep open full waterfall channels for myself and others when using the Kiwisdr for pleasure reception.
Yes. If you add &no_wf to the URL then (on an 8-channel Kiwi) you'll be assigned a channel from rx2-rx7 first before rx0-rx1 (the channels with waterfall).
You can't choose a specific channel because you have no way of knowing if it is already busy.
is there an option to not produce wf data for kiwirecoorder?
Not sure I understand the question. Using combinations of --snd and --wf you can get sound data only, waterfall only or both.
As to which channels are used: If a sound-only connection is made then the non-waterfall channels are used first (e.g. ch2-7 of an 8-channel Kiwi) to keep the waterfall-capable channels (ch0-1) free for normal connections.
that answewrs it, thanks