Wireless MCU中的主题 Re: KW41 Proximity Reporter

KW41 Proximity Reporter

danieltseng — Thu, 23 Apr 2020 03:18:34 GMT

I have studied ch5.5 Proximity Reporter of BLE Demo Applications User's Guide.pdf.
This example is divided into two parts:
1. "Immediate Alert"
Press High or Middle will immediately show different lights. There is no problem with this item
2. "Link Loss Alert Level"
Press High or Middle, and try to reach a distance of 10m, there is no response at all.
2a. I want to know what is the difference between High and Middle?
What conditions will trigger High, what conditions will trigger Middle?

What happens(phone alert sound or KW41 flashing red light) after it is triggered?
2b. I found the following program, but did not understand his behavior?

Another question:
I saw the KW41's Proximity program and saw KW41 send battery to the phone.

But did not see RSSI transmitted value from KW41 to the phone(Proximity Reporter of IOT Toolblox).
Is RSSI calculated by the mobile phone itself, or is it transmitted to the mobile phone by KW41?

Re: KW41 Proximity Reporter

Sebastian_Del_Rio — Tue, 28 Apr 2020 21:59:33 GMT

Hi Daniel, I hope you're doing well!

The proximity reporter SDK example implements the Link Loss and Immediate Alert services, described by the BLE SIG in this page.

They contain 3 alert levels, which can trigger different events depending on the severity of the alert. In the case of the SDK example, the alert level controls the different color of the RGB LED, with the no-alert status setting the LED off, and the other severity levels each configuring a different shade of blue.

The value of the characteristic can be changed, depending on the configuration done by the user.

The RSSI value is calculated on the phone's end, as it stands for Received Signal Strength Indicator, which is taken from the packets transmitted from the KW41 and received on the phone.

I'm currently performing some tests relating to this SDK example and the Link Loss service, and will provide more information about how it's implemented as soon I am able to.

Please let me know if you need any more information.

Best regards,

Sebastian

Re: KW41 Proximity Reporter

danieltseng — Wed, 29 Apr 2020 00:03:08 GMT

I know that "Link Loss Alert Level" will have different lights.
But I want to know what conditions can trigger it？
Where can users set it up?

Re: KW41 Proximity Reporter

Sebastian_Del_Rio — Wed, 29 Apr 2020 20:19:30 GMT

Hi Daniel,

The alert level value of the Link-Loss Service will determine which action (established by the user, in the SDK example this is changed in the AlertUI function) is going to be taken, generally corresponding to the severity of the update.

For more information about the Link-Loss service, could you please take a look at the Link-Loss service XML on the Bluetooth SIG's website?

Please let me know if you need any more information.

Best regards,

Sebastia

Re: KW41 Proximity Reporter

danieltseng — Thu, 30 Apr 2020 10:02:45 GMT

You misunderstood the question I asked.

AlertUI is the action to be done after the condition is triggered.
What I want to ask is where is the setting(getting) of High / Low before entering AlertUI?

Re: KW41 Proximity Reporter

danieltseng — Fri, 08 May 2020 06:55:25 GMT

Dear Sebastian,

Thank you for your support

Re: KW41 Proximity Reporter

Sebastian_Del_Rio — Fri, 08 May 2020 15:55:06 GMT

Hi Daniel,

Note: Issue was resolved internally.

Please let us know if you need any more information.

Take care, best regards,

Sebastian

Re: KW41 Proximity Reporter

danieltseng — Mon, 11 May 2020 02:11:23 GMT

This issue has now been resolved, thank you