https://devzone.nordicsemi.com/f/nordic-q-a/18446/enabling-notifications-from-peripheral-s-sideHello, I looked through the forum and tried some examples but it did not work for me. My aim is to write cccd from peripherals side (Softdevice used S110). As the result, my code is: uint32_t attr_flags = BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS | BLE_GATTS_SYS_ATTR_FLAG_USR_SRVCS;en-USTelligent Community 13Wed, 04 Jan 2017 09:04:50 GMThttps://devzone.nordicsemi.com/thread/71188?ContentTypeID=1Wed, 04 Jan 2017 09:04:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e9277d56-8aa5-48fb-96ad-1ac4d63453ddValer_I<p>Thank you,run_ar.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/71187?ContentTypeID=1Mon, 02 Jan 2017 12:40:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e493203d-0c4d-4601-8280-67ebbb8946d1run_ar<p>Enabling/disabling notifications has to be done by the gatt client. As long as you do that the client should be able to disable notificaitons from one service and enable them on the other if it whishes to do so.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/71186?ContentTypeID=1Tue, 20 Dec 2016 21:33:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4fe18b60-b83a-4ce7-b095-e65309849319Valer_I<p>Hello, as you can see I have 2 servises with two characteristics with notification (one of them is standard). If central device enadled notifications on own service, the standard service notifications remains disabled. and stay disabled even if I disable notifications on own service. Hence my idea is to try to enable notifications once it disabled in own service or enable them on services start.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/71185?ContentTypeID=1Mon, 19 Dec 2016 08:21:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:497e674b-586c-42ad-b35d-7b3f3c8289e4run_ar<p>Are you in a connection when doing this? Note The state of persistent system attributes is reset upon connection establishment and then remembered for its duration. Note that this call is normally only called when reconnecting to a known bonded peer. If you are connecting to an unknown device, the peer will have to enable notifications.</p><div style="clear:both;"></div>