Hi, "aplay somefile.wav" with or without -D default works fine om my raspberry to play audio to paired bluetooth speaker. The same command from within exec node gives error: "aplay: main830: audio open error: unknown error 524" Other commands issued using exec node work fine. I controll the movi…

A combination of the suggestions of PdJ and Colin seems to work. after rebooting the pizero i now issue "node-red-stop" and "node-red &". then "bluetoothctl power on" and "bluetoothctl connect mac-addres-speaker". Then the exec node "aplay -D pulse somevfile.wav" works. Okay for now. Would like a …

This got me audio out of the headphone socket - something similar might work for Bluetooth [image] [SOLVED]Not hearing sound using aplay via exec when running as service General Following on from how to get Node-RED to run as a service on a Pi I'm having trouble playing a…

Thanks Cymplecy, I looked at your suggestion. Aplay should play via bluetooth. It does when invoked in a terminal session so I think this is the default now. Using "aplay -D default file.wav" using node red exec however gives the error. Tried other options then "default". "-D pulse" works from ter…

How are you running node-red? If running it as a service try stopping it (node-red-stop) and run it directly in the terminal using node-red If it plays now then possibly the node-red user is not in the audio group.

Hi Colin, I start node red as a service, but i have to login opening the web interface. Node red exec node "whoami" returns my username, so i think (p)aplay is called as me? Yede

Have you tried what I suggested?

Hi Colin, I thought i did without result, now for second time is does work. I see no user node-red in /etc/passwd? how to add it to group audio then? added myself to pulse and pulse-access. don't know is that was smart... What is my next step? Thanks so far!

Look in the systemd service to see what is the user running the service cat /lib/systemd/system/nodered.service There should be lines near the start setting the User and Group.

[service] Type=simple #Run as normal pi user - change to the username you wish to ron NodepRED as User=yede Group=yede WorkingDirectory=/home/yede yede is my username. instead of standard user pi

So is that the same user that you were logged in as when you ran node-red. If so then it is not the group, it must be something to do with the environment when logged in via ssh versus the service running.

yes, same user as logged in via ssh (headless pi zero 1) and started node-red manualy

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Problem playing audio file from node red

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cymplecy 11 December 2023 10:16 2

This got me audio out of the headphone socket - something similar might work for Bluetooth

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Problem playing audio file from node red

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