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08-09-2017 02:04 PM
I was analysing power consumption in energy profiler for our app when I noticed that advertisements seem to peak at a much higher amperage then connected transmissions will.
I have set my app to use the full 8dBM of TX power.
Does this mean it's not possible to use the full 8dBM while connected or this related to protocol efficiency?
Solved! Go to Solution.
08-09-2017 02:33 PM
Analyzing with the energy profiler is probably not the best way to get accurate results. Have you tried to zoom in on an advertisement and a connection event to see what the TX peak actually is? Keep in mind that TX in connection intervals is much shorter than advertisements where a packet is sent (typically) on 3 channels and that can cause the profiler to render the peaks with increased height.
08-14-2017 05:44 AM
I tired your suggestion, zoomed all the way in and checked the duration of the spike but it seems to be of equal duration. Even zoomed in it's still tiny but I tried my best to select the peak.
Please check the following screenshots. TX power is set to 8dBM in both cases.
Advertising power consumption;
Connected power consumption;
08-14-2017 07:42 AM - edited 08-14-2017 07:43 AM
Could you please try the same on Windows?
I don't have access to a Windows machine at the moment.
PS: I've reported the zoom issue.
08-15-2017 01:25 AM - edited 08-15-2017 01:25 AM
Well, the energy profiler is ok if you want to look at average values but it's not good for instantaneous figures because of sampling rate limitations.
Here are measurements done with a more powerful power analyzer. As you can see the peak for both connection and advertisement is the same.