current consumption measurement on nrf52

[oliverhu]

Hi,currently i want to measure the current consumption of nrf52 DK. I followed the tutorial nRF51 current consumption guide,and use the Power profiling application in the nRF52 0.9.2 SDK.

I loaded the Power profiling application into the new nRF52 board(pca10040). but after i press button 1(connection mode), the master control panel can't detect the Bluetooth signal, it seems like it is always under the sleep mode. but when i downloaded the same application into the older version NRF52 DK(PCA10036),it work properly.

I also found that some people confronted the same issue,see the thread here

Thank you and appreciate your help.

[Stefan Birnir Sverrisson]

Hi

See the nRF52 compatibility matrix for what softdevice and SDK is compatible with what nRF52 IC revision.

For example, for nRF52832 Engineering B (PCA10040 0.9.0) you need S132 2.0.0-7.alpha softdevice and BLE example application from nRF5 SDK 11.0.0-2.alpha

[oliverhu]

Hi Stefan, Thank you,very much, I have used the older version nrf52 board to test the power consumption, but i set the connection interval 100ms and the data packet size 20 byte and modified the main for loop as the tut said. but the DC RMS value is aroud 2mA which is higher than the expected avg current value(65.9uA) in the Current measurement guide tutorial, Do you know why?

[Stian Røed Hafskjold]

You should not use PCA10036 for current measurements, because of the long errata. Use PCA10040 v0.9.0 with s132 2.0.0-7.alpha or PCA10040 v1.1.0 with s132 2.0.0.