Best possible strategy for deep sleep and awakening

Question

Hello, 
 I'm working on NRF9160-DK. I would like to be able to put the card to sleep in the deepest sleep possible to be able to save as much energy as possible and to wake it up if the state of one of my 3 inputs changes (button press, accelerometer or other). What is the right strategy for falling asleep and waking up? k_sleep () or is there something better? What orders of magnitude am I supposed to get for my NRF9160-DK in the best solution to sleep card? 
 
 Best regards, 
 
 Lecozahu

Carl Richard · Accepted Answer

Hello, again! Good to hear that the answers were helpful. In System OFF mode only Reset and GPIO can wake up the device, the RTC is unavailable. As seen in the current consumption specifications I added in my previous comments the RTC is available as a wake up source, with a resulting minimum of 2.35µA. System ON mode is not to be confused with PSM, which is a feature of the modem. The current used during PSM will add to the current used by the MCU. From our tests you can expect ~7µA with PSM in combination with System ON. Note that the modem in this case maintains connection to the network, saving power and time costs when waking up. My fellow engineer, Håkon, has done a quite good explanation of the Low Power modes in this thread . Hope this is helpful! Best regards, Carl Richard

Best possible strategy for deep sleep and awakening

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