https://devzone.nordicsemi.com/f/nordic-q-a/22867/updating-a-gatt-valueHi! So I have my GATT value of a service that I would like to update. Sadly that value always stays at the initial value. Below you can find my update function. uint32_t ble_pwr_data_update(ble_pwr_t* p_pwr, pwr_data_t pwr_data){ if (p_pwr en-USTelligent Community 13Fri, 16 Jun 2017 16:12:45 GMThttps://devzone.nordicsemi.com/thread/89897?ContentTypeID=1Fri, 16 Jun 2017 16:12:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b6a8ab72-b81c-4b35-ab84-a82133e05388FormerMember<p>To make notifications work, the client (typically central/master) has to enable notifications on the server. <a href="https://devzone.nordicsemi.com/tutorials/37/">This</a> video tutorial part 1 at approximately 19:15 explains data transfer using notifications, I would recommend you to take a look at it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/89895?ContentTypeID=1Fri, 16 Jun 2017 15:50:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3a1582ff-538b-4c70-9ef4-d937054c677cYatekii<p>The update of the value does not work. Even if I manually request the value (Nordic Developer Mobile App), it doesn&#39;t update.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/89896?ContentTypeID=1Fri, 16 Jun 2017 15:29:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:021d820a-5a70-4ded-a26c-2b33b5be4d63FormerMember<p>I&#39;m not sure if I clearly understand, is the problem that notifications never are transferred (sd_ble_gatts_hvx() )? Or that if you use sd_ble_gatts_value_set(), the value is not updated?</p><div style="clear:both;"></div>