Rx data from kw40 issue

[pedroortegasanz]

Does anyones achieve recibe data from kw40 using app inventor?
I have done an app and I am able to send data to KW40Z, but I can`t recibe.
(I am using frdm-kw40z and bluetooth wireless uart demo).

Regards

[estephania_mart]

Hello, 

The issue you are experiencing, is it in your custom application of the cellphone or is it on the KW40? 

Regards,

Estephania 

[pedroortegasanz]

Hi Estephania.

The problem is in my custom app, when you use IoT Toolbox of NXP, all works properly.

But I don`t know what UUID must to use to receive data. I use 01ff0100-ba5e-f4ee-5ca1eb1e5e4b1ce0 and 01ff0101-ba5e-f4ee-5ca1eb1e5e4b1ce0 to send string to KW40 and works fine, but I don`t know if to receive data is the same or is different.

The system work perfectly when we use your app IoT ToolBox, but the problem is now, when we want to do a specific app to control our system.

Thanks in advace.

Best regards

De: estephania_martinez <admin@community.nxp.com>

Enviado el: miércoles, 10 de abril de 2019 16:57

Para: ORTEGA SANZ, PEDRO <pedro.ortega@thyssenkrupp.com>

Asunto: Re: - Re: Rx data from kw40 issue

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Re: Rx data from kw40 issue

reply from Estephania Martinez<https://community.nxp.com/people/estephania_martinez?et=watches.email.thread> in Wireless Connectivity - View the full discussion<https://community.nxp.com/message/1137499?commentID=1137499&et=watches.email.thread#comment-1137499>

[estephania_mart]

Hello, 

Are you sure you already have the connection established and have the correct device to send the information? DO you have a way to get a sniffer log to confirm you are receiving the data correctly? 

Regards, 

Estephania 

[pedroortegasanz]

Yes sure,

I have a connection established (all data that I send from mobile/tablet arrive to the system, but the answer from device to mobile does not come). And I don´t know how I can sniff the connection.

Do you know any method to capture the traffic between device and mobile?

Best regards

De: estephania_martinez <admin@community.nxp.com>

Enviado el: miércoles, 10 de abril de 2019 18:02

Para: ORTEGA SANZ, PEDRO <pedro.ortega@thyssenkrupp.com>

Asunto: Re: - Re: Rx data from kw40 issue

NXP Community <https://community.freescale.com/resources/statics/1000/35400-NXP-Community-Email-banner-600x75.jpg>

Re: Rx data from kw40 issue

reply from Estephania Martinez<https://community.nxp.com/people/estephania_martinez?et=watches.email.thread> in Wireless Connectivity - View the full discussion<https://community.nxp.com/message/1137593?commentID=1137593&et=watches.email.thread#comment-1137593>

[estephania_mart]

Hello, 

You will need a sniffer to capture the frame and with that information, you will be able to see and notice how it's the packet sent.

It is most likely that there are some filters or you might not be filtering the packet in the correct way, but as that it's on your application side, I'm afraid I can't guide you through it. 

Regards, 

Estephania 

[pedroortegasanz]

Yes, I understand you, but only one question.

Please, could you confirm me that to TX and RX data from/to KW40 is needed use the same UUIDs? Or there are different UUID for transmit and receive?

Thank you

De: estephania_martinez <admin@community.nxp.com>

Enviado el: miércoles, 10 de abril de 2019 18:52

Para: ORTEGA SANZ, PEDRO <pedro.ortega@thyssenkrupp.com>

Asunto: Re: - Re: Rx data from kw40 issue

NXP Community <https://community.freescale.com/resources/statics/1000/35400-NXP-Community-Email-banner-600x75.jpg>

Re: Rx data from kw40 issue

reply from Estephania Martinez<https://community.nxp.com/people/estephania_martinez?et=watches.email.thread> in Wireless Connectivity - View the full discussion<https://community.nxp.com/message/1137596?commentID=1137596&et=watches.email.thread#comment-1137596>

[estephania_mart]

Hello, 

The FRDM-KW40 has a UUID and your phone has another UUID. 

Regards, 
Estephania