S140 Advertising Scenario

[Dani]

Good morning,

  I'm designing a new product based on the nRF52840 device (s140) and power consumption is one of the key parameters for my project.

  The equipment (peripheral) should be advertising periodically (but not always) in order to make it possible to be discovered by a Smartphone.

  Could you suggest me a suitable interval and timeout times in order to...

   - Be discovered when a smartphone is looking for my device

   - Keep the lowest power consumption as possible

 Now, my application is working with the following parameters:

 - Advertising is carried out every 10 seconds.

 - When advertising, interval is set to 25ms and duration is set to 2 seconds.

What do you think about this setup? Which setup would you recommend?

Best regards,

Dani

[Simonr]

Hi Dani

You can use our Online Power Profiler to evaluate various current consumption estimates for your application by tweaking the advertising interval parameters etc. I would probably increase the advertising interval somewhat, as that saves a lot of power. Setting the interval to 50ms saves nearly 100uA according to the power profiler. Of course, you should test this to confirm that your phone is able to detect it, but I don't think it will be a problem.

An advertising duration set to 2 seconds I imagine might be an issue. Have you tested this and seen that you're able to discover the device in time at just 2 seconds of advertising? I'd suggest upping this to 5 seconds and let it sleep for a longer time instead, but if 2 seconds durations works for you I don't see the harm in using that number.

Best regards,

Simon