Power Consumption

[Sai Kiran]

Hi,

I am using nRF52832 DK, with Segger Embedded Studio as IDE. I am using ble_app_uart example. I have used an encryption algorithm.  The encryption algorithm is called from the main function. I want to know the power consumption of the encryption algorithm.

Thanks,

Sai Kiran.

[Susheel Nuguru]

If you have nRF Power Profiler Kit. You can make and application that goes to sleep just after your encryption algorithm is finished. If no other peripheral is running in the background while sleeping then the power profiler will show you how much power was required to process your encryption algorithm.

[Sai Kiran]

Thanks for the information. I do not have nRF Power Profiler Kit with me. Is there any other way this can be done?

[Susheel Nuguru]

You probably can do this with a voltmeter if you program an app_timer to wake the chip every 1s and in the timer callback you can execute the encryption algorithm and make the chip go back to deep sleep. If you measure the average power consumption here  Y uA.

When you get an average current in the voltmeter, you need to substract few X uA (which are consumed by CPU/peripherals ramp up current till it configures the RTC).

The value of X can be obtained if you test the power consumption of the same application above but removing your encryption algorithm that is called every 1 second. 

(Y - X) gives the average power consumption of your encryption algorithm.