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Collegamento EV3 a cassa bluetooth


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Il 16/4/2019 alle 11:05, GianCann ha scritto:

Ciao,

mi sai dire però dove e come salvare i file /etc/systemd/system/pulseaudio.service  e

/etc/dbus-1/system.d/pulseaudio-Bluetooth.conf 

?

grazie mille 

matteo 

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2 ore fa, Matteo Decarli ha scritto:

mi sai dire però dove e come salvare i file

Hai dimestichezza con Linux?

I percorsi sono:

Quota

/etc/systemd/system/pulseaudio.service 

e

/etc/dbus-1/system.d/pulseaudio-Bluetooth.conf 

Puoi usare il comando sudo nano per creare i file e copiare il contenuto testuale indicato nell'articolo.

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7 ore fa, Matteo Decarli ha scritto:

ci viene detto che il file /etc/pulse/system.pa non esiste. Arriviamo fino a questo punto !

Ciao @Matteo Decarli,

io no ho mai utilizzato questa funzionalità e quindi non ti posso aiutare molto di più di quanto ho potuto fare finora.

Provo a chiedere direttamente Jorge Pereira, l'autore dell'articolo pubblicato sul blog ofalcao.pt (il suo blog personale) se può intervenire lui stesso: è una persona molto disponibile ed attività nelle community AFOL e vedrai che saprà aiutarti a risolvere il problema.

Nel frattempo, mi puoi raccontare come mai hai bisogno di usare uno speaker esterno?

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Ciao a tutti.

Sorry but my italian is just 'prego' and 'pizza' :) I will try to help you but in english.

I'm the author of that post but it is now 2 years old and ev3dev linux is moving very fast. It was also a very customized thing - by default, as you already notice, ev3dev doesn't have pulseaudio installed, just alsa.

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this was the original intention "una cassa via bluetooth oppure un altro tipo di amplificazione per l'audio"

both are possible but if you are not willing to have  _a_lot_  of work, I strongly suggest the second option - you can connect a cheap USB sound card to ev3dev and use the headphone output to connect to a sound amplifier.

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You can see one of of these USB sound cards on this video:

I don't have a link for it but most cheap USB sound card with MIC and PHONE plugs should work, here a link to a chinese store with several models for you to get an idea:
https://www.banggood.com/buy/external-usb-sound-card.html?utm_source=google&utm_medium=cpc_ods&utm_campaign=cyc-sds-cam&utm_content=ysq&ad_id=343585077259&gclid=CjwKCAjw-4_mBRBuEiwA5xnFIIEig2VE2inPU8BEc1bjOWb4gEJoKIzDTcmTRIZh_wifKLuBCei--hoC0yMQAvD_BwE

I'm using small speakers with amplifier inside, powered by miniUSB cables.

Edited by JorgePe
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And sorry but don't know exactly what is the goal. Use on big LUG events with lots of public or just small rooms?

For small rooms there is a 3rd option, no linux needed, some fellows are using it with plain EV3-G: an induction speaker like this:
https://www.banggood.com/Wireless-Audio-Interaction-Mutual-Induction-Speaker-For-Smart-Phone-p-79720.html?cur_warehouse=CN

unfortuntely it doesn't have enough sound pressure for a large room with lots of ambient noise.
Some guys also open their EV3 and solder a mono female 3.5 mm plug to the internal speaker wires so they can use an audio amplifier directly.

Edited by JorgePe
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