Difficulty running UnetStack on Raspberry Pi

[xdead10cc]

Hello Community Members,

I have met all pre-reqs for running UnetStack on RaspberryPi as per this blog -- https://blog.unetstack.net/Project-Sabine-Low-cost-DIY-underwater-modem-using-COTS-components-and-Unet-audio. This includes Java8, PortAudio, and I am using the Raspberry Pi community edition of Unetstack that is available on https://github.com/org-arl/unet-doc/raw/master/docs/downloads/unet-community-pi-3.1.0.tgz

rpr@rpr:~/unet-3.1.0 $ bin/unet -c audio
Modem web: http://localhost:8080/

phy.fullduplex = true
true
plvl -10
OK
subscribe phy

Attempting transmission:

phy << new TxFrameReq(data:[1,2,3])
AGREE
phy >> TxFrameStartNtf:INFORM[type:CONTROL txTime:0 txDuration:-2147483648]
phy >> FAILURE: Timed out

Log message from phy-log-0.txt:
1736416871348|WARNING|txscheduler.c:94|TX failed
Log message from log-0.txt:
1736416906390|WARNING|org.arl.yoda.Physical/yoda@34:cleanPending|Request 1736416870511 timed out

Next Transmission:

tell 0, 'hello'
AGREE
phy >> TxFrameStartNtf:INFORM[type:DATA txTime:0 txDuration:-2147483648]
phy >> TxFrameStartNtf:INFORM[type:DATA txTime:0 txDuration:-2147483648]
phy >> TxFrameStartNtf:INFORM[type:DATA txTime:0 txDuration:-2147483648]

Log message from phy-log-0.txt:
1736417108510|WARNING|txscheduler.c:94|TX failed
1736417147397|WARNING|txscheduler.c:94|TX failed
1736417192470|WARNING|txscheduler.c:94|TX failed
Log message from log-0.txt:
1736417146389|WARNING|org.arl.yoda.Physical/yoda@34:cleanPending|Request 1736417107665 timed out
1736417191389|WARNING|org.arl.yoda.Physical/yoda@34:cleanPending|Request 1736417146552 timed out
1736417236389|WARNING|org.arl.yoda.Physical/yoda@34:cleanPending|Request 1736417191623 timed out

I am using a USB soundcard connected to my Raspberry Pi and the output goes into my earphone. I have tested running a youtube video and my earphone is getting the sound perfectly. So it is not a hardware problem, I assume.

Here is my sound configuration.
rpr@rpr:~/unet-3.1.0/logs $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: vc4hdmi [vc4-hdmi], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0

I can really use your help in getting my system running. Your help is greatly appreciated in debugging this problem.