#sx1255 — Public Fediverse posts

#sx1255

LinHTZmq: SX1255 tuned to 433.54 MHz
double free or corruption (out)
Aborted

#linht #sx1255 uhf pi hat listening to down converted #qo100 #ft8 via #soapysdr #gqrx

Delay is more than a second compared to #pluto sdr...

#hamradio 2026

I stuck with zmq-pub for more than a half year, now fetched the #linht way of exposing the #sx1255 with zmq_proxy.

Rx ssb should be feasible real soon now.

Would like to transmit #M17 to be able to test module17 hardware, another sleeping project.

#sx1255 pi hat new action with zmq_proxy and soapysdrserver

Almost works!

Another pi can find it with soapysdrutil --find
But #gqrx too heavy for a pi zero 2 hardware

#hamradio #70cm #uhf #linht

https://github.com/rxt1077/sx1255-presentation/blob/master/slides.pdf

#sx1255 #hamradio #70cm #sdr

Playing around with ctcss squelch block analog.ctcss_squelch_ff(self.audio_rate, 131.8, 0.10, 0, 0, False)

It works, but sometimes short cracking noise when there is no carrier with 131.8

The default 0.01 gave continue noise, but 0.11 kills audio even if the carrier is there. Maybe the latter 3 parameters should be adjusted? Wiki block docu is limited.

https://wiki.gnuradio.org/index.php?title=CTCSS_Squelch

#gnuradio #sx1255 #uhf #sdr #hamradio

https://amphenolprocom.com/products/filters/353-mpx-70-6

ow, up to 25 Watt, nice find!

Will fit my #sx1255 pi hat UHF experiments

#happybunny #hamradio

leo@rpi0:~ $ aplay -D bluealsa cq.wav
[4474] D: bluealsa-pcm.c:1538: Getting BlueALSA PCM: PLAYBACK B0:38:E2:3E:8A:14 a2dp

Connectig a #bluetooth headphone to #pizero all good fun, but aplay -l or arecord -l would never show the new connected device.

However it is there and it works.

#linux #debian a complete waste of time :p

#hamradio #sx1255 #m17

leo@caribou:~/Projects/libsx1255 $ ./example
Resetting SX1255...
SX1255 chip version: V0H
Configuring SX1255...
Sample rate setup error
TX PLL: locked
RX PLL: locked
SX1255 configuration complete

#sx1255