how to wake up from sleep mode

[ps_anu]

hi.....

i am using nrf52832 ........

i want to wake up my device from sleep mode ... i have used the command for sleep mode sd_app_evt_wait() ...... i dono  what command to give for waking up device from sleep mode 

thanks in advance

suggest me an answer

[Einar Thorsrud]

Hi,

The sd_app_evt_wait() calls __WFE() internally (among other things), so the nRF will wake up on any event/interrupt. A typical wake up source is a RTC compare event or GPIO input interrupt, but it could be anything.

[ps_anu]

hi... Einar

Once I put in sleep mode it will wake up by interrupt and send the data and again I want to put in sleep mode after sending data how ?? Can I put the sleep mode again 

[ps_anu]

thank you so much ... Einar ... i will implement it and get back 

[ps_anu]

hi.... Einar ... i am confused how to put device in sleep mode before entering into process or function...

i want my device to sleep until it attains threshold ,, it will wake up by threshold and again it should go to sleep 

how ??

suggest an idea

[Einar Thorsrud]

Hi,

What do you mean by "it attains threshold"? Do you want to trigger an interrupt when the voltage on a GPIO crosses a certain threshold? If so you could for instance use the LPCOMP.

[ps_anu]

i am using temperature sensor .. i used the if condition ... if it reaches above the certain value in temperature then it should send the data in ble_uart app ,and then put the device in sleep mode .... in this case i want my device in sleep mode until the threshold point ......  

[Einar Thorsrud]

Hi,

Please elaborate. What threshold point? How will you know that it has been hit? If it requires reading the temperature sensor, then clearly the nRF cannot sleep until the temperature reaches the threshold, as the nRF has no way of knowing. Without full information it seems to me that you need to wake up regularly to read the temperature sensor, and then do some task if the temperature has crossed your threshold. If that is the case you could for instance use the timer library to wake up regularly to measure the temperature.

[ps_anu]

No... not like that ....... if it attains the threshold only it will send the data over ble until it will never enter the ble_nus 

[ps_anu]

is it possible to put in sleep mode before reading the thershold 

[ps_anu]

i want to put my device in sleep mode and wake up by interrupting the sensor 

[Einar Thorsrud]

Please be a bit more verbose in your questions, that way we will be able to help you much better. I still have no idea about how your system is intended to work and how you interact with the sensor and how you intend to trigger wakeup of the nRF.

[ps_anu]

HI....Einar ...

 Here , i have the attached the step by step process.. what actually i want to do ...

tell me is it possible or not 

pls see the pic