Sending data from a FRAM by SPI and immediately sending them by BLE

[Reza papi]

Hi everyone,

I am trying to create a system to collect data from different sensors and store them in a FRAM. Then by using SPI, I want to transfer the data to the nRF52832 development kit and immediately send them by BLE. And, finally after transmitting the data put the nRF radio device in off mode to save power consumption. this is critical in my project because we wanted to use a battery for nearly a month. So the algorithm is waking up the nRF, transferring data by SPI, Sending data by BLE, and again putting the device in off mode. is there any difference between idle mode and off mode? and how can I wake up the system to repeat this process?

I am trying to use UART example as a base project. is it possible to mix spi communication with nus service? does anyone have experience with this kind of project? 

Thank you

[Reza papi]

Thank you so much for all these information.

Yes, the FRAM and nRF are communicate with SPI. I need to achieve 80uA in average current level, so my plan is to transmit every 1 or 2 minutes. is it possible to achieve this low current with idle state? do you have any suggestion for that? 

[Hung Bui]

Hi Reza, 
If configured correctly the nRF52 should only consume 2-3uA when it's in idle mode. 

[Reza papi]

That's great. So, I will go ahead and modify the code for that.