current consumption issue during sleep mode

[MeghaC]

Hi,

Using SDK14.0.0, soft device: s132_nrf52_5.0.0

If Segger embedded used them use latest sdk as below, because sdk 14.0.0 has no support for segger embedded.

nRF5_SDK_17.0.2_d674dde\examples\ble_central_and_peripheral\experimental\ble_app_multirole_lesc\pca10040

& replace main file and check.

Other wise you can check it directly by importing it to eclipse IDE. & change sdk root path in make file for compilation.

Multirole_FreeRTOS_Example.7z file of application firmware attached: 

 https://smetgroup-my.sharepoint.com/:u:/g/personal/megha_choudhari_mysmindia_com/ES3k5Cbbg_FPoEH-Y0gWPUUBNVkzrM1cRiS0V5ee20m7Zw?e=kNPcxt

Sleep current Result observed on nRF52832 DK Board 

1. Scanning ON/OFF every 30 sec . DCDC enable and Disable same sleep current ~ 23 uA  
2. SW1 and SW2 pin configured as input interrupt pin with No_Pullup configuration Sleep current increase in both cases up to 100uA

 

Sleep current results observed on Device 

1. If SW1 and SW2 Pin not configured as input interrupt pin : both DCDC Enable and Disable same sleep current observed .

Also, When Sleep mode enable current is 3uA, DCDC mode Disable in central profile sleep current observed 300uA & In Peripheral profile it is 3uA. Why this much of variations getting?

Help to review code.

Regards,

Megha Choudhari

[Simonr]

Hi Megha

Is this reproducible on a Development Kit or are they using a custom board? 

I'm think that something is still running on the central-side of the application when they try going to sleep. How are you measuring the current draw on your device? If you're using the Power profiler, I would like to see a graph of the current consumption, maybe that might give us an idea of why the central draws so much power.

Best regards,

Simon

[MeghaC]

Hi,

It is reproducible on a Development kit of nRF52832. They are using custom board also.

Latest result values measured on current meter not on Power profiler.

Regards,

Megha Choudhari