Question about consumption nRF51822

[Matt_Error]

Hi,

I'm looking for a BLE device to work with an arduino and to speak with a smartphone. The point is that the connection should be made by the user via the smartphone. This connection would be rare and short (around 5 seconds to transmitt data and every 5 hours or so) Meanwhile, I would like low consumption (sleep mode ? Then the problem is how to wake him up, since it has to be woken up by the smartphone...)

So my questions :

In sleep mode, can we pair with the smartphone and wake him up. I think no...

What would be the consumption between the 5 hours, doing nothing but wainting for connection ?

Thanks

[endnode]

The simplest way it seems to get one GPIO line on nRF5x, configure it as output, set LOW or HIGH (depending on what you want to sense on Arduino side), wire it to similar PIN on Arduino which you could call interrupt and once some event happens on nRF5x simply run nrf_gpio_pin_set/clear and you are done. See GPIO functions in nRF SDK components\drivers_nrf\hal\nrf_gpio.h.

[Matt_Error]

Ok, Definitely, things I have to learn/understand :) Thank you !