To power ON & OFF sysem using single button in nrf52810

[srinivasa m]

hello everyone,

         I am designing a device which is operated with coin cell battery, I want to turn on & turn off a device using single button. when device in on mode it should read the sensor data and send to mobile over BLE. if I turn off device I don't want to perform any task and it should be completely in off mode and power consumption should be in few nano amps.

Please help me to perform this task.

thank you

[Kazi Afroza Sultana]

Hello,

Which SDK you are using? nRF Connect SDK or nRF5 SDK?

Thanks.

Best Regards,

Kazi Afroza Sutana

[srinivasa m]

thanks for your replay,

I am using nRF5 SDK 17.1.0

[Kazi Afroza Sultana]

Hello,

You can look at this https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/pin_change_int_example.html?cp=8_1_4_6_20 pin change example as a starting point. In addition to this, you may also look at pwr_mgmt example, that shows how to go to System OFF mode using the nrf_pwr_mgmt library https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/pwr_mgmt_example.html

[srinivasa m]

Hi,

if i use pin change interrupt gpiote, power consumption is high that is 1mA. 

[Kazi Afroza Sultana]

''if use pin change interrupt gpiote'' - can you please say details about it or showing some part of the codes? 

[srinivasa m]

Hi,

thanks for your response, and sorry for late reply.

actually in my case a button is used to control system off and system on. in system on case, power consumption is taking 1mA after using gpiote pin interrupt, but my requirement is power consumption should less then 100uA.

could you please suggest me 

[Kazi Afroza Sultana]

Hello,

''in system on case, power consumption is taking 1mA after using gpiote pin interrupt, but my requirement is power consumption should less than 100uA. '' - If the nRF52 is drawing 1mA current then it is not in System OFF mode. It should be closer to 1uA. 

Do you have infinite loop after entering system off mode in the code? that could trigger to make system on again. You can look from this point of view, and also if you want can post your code here. I can make the case private. 

Thanks.

BR

Kazi