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Bluetooth SDK

ToMc_537676
New Contributor

We have designed in the CYW20719 to our headset/audio product, but have not been able to get HSP or A2DP sink to work.

We chose this part because the datasheet recommends this part for "headset, earbuds, and other audio solutions" and it supports our I2S interface.

Are these profiles supported at all?  I have recently uncovered old forum posts that mention that neither HSP nor A2DP sink is supported on the CYW20719(B1).

This conflicts with the data sheet, and also with the WICED BT SDK v2.6 API reference for 20719 that has API functions listed for A2DP sink.

Is this only the case with the B1 version? I found a link on the Cypress site that mentions the migration from B1 to B2 version, but the link is dead.

We tried to start with porting the demo code from CYW20706 as suggested in a previous post, but eventually saw another old post that the 20706 ROM and stack is not compatible with the CYW20719, adding more confusion.

Since our product is based on both these features, we need to know if we have run into a dead end.

To make things worse, we have already done a pre-production run of our PCBA that has CYBT-413034-02 modules installed.

If we have to replace all these module parts to support the BT features by using the CYW20706, there does not appear to be a 20706 module that has a compatible footprint, so we will have to scrap this run.

Any help and guidance would be greatly appreciated!

Thank you.

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1 Solution
SheetalJ
Moderator
Moderator

Hi ToMc_537676​,

CYW20719B1 and CYW20719B2 do not support A2DP sink functionality. This is already mentioned here: WICED Bluetooth Software Features

We apologize for the 'link is dead' error; This is a technical glitch due to Cypress-Infineon migration process. Please find difference between CYW20719B1 and CYW20719B2 here: Change List CYW20719-B1 and CYW20719-B2

We have different modules available using CYW20706 which can be used to replace the CYBT-413034-02 modules you are using. However, I dont think they will be pin-to-pin compatible with each other. You will need to make changes in your design.

If you are going for CYW20706, we have demo example available to demonstrate A2DP sink & source.

Moreover, I would suggest you to look at Cypress audio solution CYW20721. We also have modules available using CYW20721. Please check with your local Cypress team for more details on CYW20721 based modules.

We apologize for the inconvenience caused to you. Feel free to post your queries on Cypress Community, we will help to solve your doubts as fast as possible.

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2 Replies
MichaelF_56
Moderator
Moderator

Unfortunately, A2DP Sink is not supported on the 20719B2.

The feature is supported on the 20721B2, which is the same HW device with firmware optimized for audio.

This support is described in the Technical Brief here:

https://community.cypress.com/servlet/JiveServlet/previewBody/20032-102-2-26136/Bluetooth%20SDK%202....

The 20721 does have some additional engagement criteria, so you need to reach out to your local Cypress sales/Distributor.

I have also reached out to them on your behalf.

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SheetalJ
Moderator
Moderator

Hi ToMc_537676​,

CYW20719B1 and CYW20719B2 do not support A2DP sink functionality. This is already mentioned here: WICED Bluetooth Software Features

We apologize for the 'link is dead' error; This is a technical glitch due to Cypress-Infineon migration process. Please find difference between CYW20719B1 and CYW20719B2 here: Change List CYW20719-B1 and CYW20719-B2

We have different modules available using CYW20706 which can be used to replace the CYBT-413034-02 modules you are using. However, I dont think they will be pin-to-pin compatible with each other. You will need to make changes in your design.

If you are going for CYW20706, we have demo example available to demonstrate A2DP sink & source.

Moreover, I would suggest you to look at Cypress audio solution CYW20721. We also have modules available using CYW20721. Please check with your local Cypress team for more details on CYW20721 based modules.

We apologize for the inconvenience caused to you. Feel free to post your queries on Cypress Community, we will help to solve your doubts as fast as possible.

View solution in original post

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