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BlueNRG consumption doesn't follow estimation tool

Question asked by raphael declercq on Mar 16, 2017

Hi, i'm working with the BlueNRG-MS evaluation board (x-nucleo-IDB05A1) together with an stm32L073RZ.
I'm putting the module in advertising mode with the stm in stop mode. 

With an 20ms advertising period, i am measuring a 1,5µA current (for the stm + BlueNRG), the estimation tool gives me 873µA. I cannot figure out from where comes this big difference.

Maybe it is due to the refresh period of my amp-meter, but anyway, it may not be able to diplay the peaks but it should display the average current given (i.e 873µA).

other thing: i am observing the RSSI on an android app, when i change the advertising period, i can see that the RSSI displayed is refreshed consequently to the modification i made. BUT, the bigger my period is, the bigger the consumption is. It should be the contrary.

again it may have to do with my amp-meter refresh period, but i'm not sure since it should display the average consumption.

 

can someone help me?
Thanks by advance,

 

Raphaël  

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