https://devzone.nordicsemi.com/f/nordic-q-a/36400/slave-current-consumptionHello, I was wondering if there is some way to program a device to act like a BLE slave, which would sleep and periodically wake up to stay in receive mode for a certain amount of time, and then go back to sleep. I have already been measuring currenten-USTelligent Community 13Mon, 16 Jul 2018 17:16:39 GMThttps://devzone.nordicsemi.com/thread/140274?ContentTypeID=1Mon, 16 Jul 2018 17:16:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67ef6ef9-e3e7-4d63-98f9-96b4f21f1c27MartinBL<p>Hi,&nbsp;</p> <p>Yes, that shouldn&#39;t be problem. You can use timers or RTC to keep track of time while in sleep mode and wake up at whatever intervals you want to do some scanning. I suggest that you look at one of the <a title="BLE Central" href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/examples_ble_central.html?cp=4_0_9_4_2_0">BLE Central</a> examples in the SDK. They show&nbsp; you how to scan, and don&#39;t advertise.&nbsp;</p> <p>In the BLE world, such devices that neither advertise nor initiates any connections are <a href="https://devzone.nordicsemi.com/f/nordic-q-a/71/what-is-a-client-and-server-in-ble">called Observers</a>.&nbsp;</p> <p>&nbsp;</p><div style="clear:both;"></div>