Thanks for your advise!
Now i pad my message with zeroes so that the hackrf buffer is completely
filled. This works perfectly!
Am 10.12.2020 um 10:15 schrieb Sylvain Munaut:
GNuradio is a streaming system by design, you need to
insert as many
zeros as you need between your bursts (depending on the idle time you
want between your bursts).
That's inherent to the way GR buffers data between blocks and won't
call the work() method until it has "sufficient" data.
Cheers,
Sylvain