Proximity WiRa application which is the best design/EVB KIT to start from?

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Maurizio Malaspina
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Proximity WiRa application which is the best design/EVB KIT to start from?

I have to develop a proximity (or WiRa) application, so I've some dubts about the choice of the most appropriate evaluation kit to start from.

Reading the UM-B-137 "SmartBond™ Wireless Ranging SDK", this references both UM-B-103 "DA14695 USB Kit" and UM-B-093 "DA1469x PRO Development Kit" and I've noted that the DA1469x PRO DK Daughterboard implements an Inverted L shaped antenna, while the DA14695 USB Kit uses a printed ZOR type antenna.

So I wonder if the performance of the solutions are equivalents?

Your WiRa application should run on both platforms, and my final application will very similar to this demo, therefore I've already estimated a final product cost, based on the DA1469x PRO DK Daughterboard BOM and PCB. At this point I'm asking myself what are the necessary tools to start experimenting with this last solution.

I think I need:

- n. 1 pcs of DA14695-00HQDEVKT-P

- n. 2 pcs of DA14695-00HQDB-P (supposing once programmed with the demo, the application will run out of the development kit, just powering up the daughter board via USB, is this right?

or alternatively:

- n. 1 pcs of DA14695-00HQDEVKT-RANG

Last question. Supposing I'll design a custom board based on one of the two evaluation kits above mentioned, how could I program and debug them? I need an external programmer? What kind of programmer do you suggest?

Thank you in advance,

Maurizio

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PM_Dialog
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Hi Maurizio Malaspina,

Hi Maurizio Malaspina,

Thanks for posting and for your interest in our WiRa / DA1469x solution.Please refer to the WiRa user guide and see section 4.1 Hardware. In case of the Pro-DK(DA14695-00HQDEVKT-P), you should do some PCB modifications – all of them are mentioned in section 4.1. I would suggest to have 2 x Pro-DKs, so that you can debug the code. However, yes you can program the daughter board and power it through battery supply. For evaluation, having 2 x pro-DK is recommended. In case of DA14695-00HQDEVKT-RANG, you can use them board as they are – not extra HW modification are required. HW modifications have already been applied in-house for all delivered DA14695 Wireless Ranging DKs

https://www.dialog-semiconductor.com/sites/default/files/um-b-137_da1469x_wireless_ranging_sdk_rev_2v0.pdf

Regarding your last question, you can expose the SWD signals and connect JTAG of the Pro-DK with your custom board. By this way you will have JTAG access and you can debug/program your custom design.   

The AN-B-066: Hardware Design Guidelines document demonstrates the basic HW design guidelines.

Thanks, PM_Dialog

Maurizio Malaspina
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Thank you very much indeed

Thank you very much indeed for the fast and clear reply.

I ask you again if the performace of the two printed antennas are equivalent or one of the two best perform on the other. What can you tell me about?

A last question before proceeding with the evaluation of this technology: I understand that the demo application can be configured to act as Initiator or Responder and that multiple - but not in parallel - DTE ranging measurements over an equal number of BLE connections are also supported ( "multilink_num" paramter ).

Said this, is possible to manage a situation where there are multiple nodes, all equivalents? Imagine a social distancing application where plenty of people within one area wear a device that alert them when one or more person, wearing an identical device, is too close to them. Is this scenario implementable with your technology? Maybe each node should acts both as  Initiator and Responder, alternatively over time.

If yes, how and with what limitations? 

 

Thank you again,

Maurizio

PM_Dialog
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Hi Maurizio Malaspina,

Hi Maurizio Malaspina,

Please take a look at this forum thread:

https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs/wira-sdk-usb

Does that answer your question?

Thanks, PM_Dialog