https://devzone.nordicsemi.com/f/nordic-q-a/15196/is-their-any-chance-to-update-manufacture-field-independentlyHi, In my project I need to measure current values for every sec and update those values to advertising data. So, I take manufacture field in advertising data to update the current values my advertising update function is shown below static void updateAdDataen-USTelligent Community 13Mon, 18 Jul 2016 11:35:05 GMThttps://devzone.nordicsemi.com/thread/58012?ContentTypeID=1Mon, 18 Jul 2016 11:35:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:45825967-05e1-460a-a8ab-65b6e0aac264atune<p>ble_advertising.h isn&#39;t really suited for your use case methinks. You should probably write your own library to handle initialization and writing the manuf data, or modify ble_advertising to provide a function to only change the manuf data. You always need to have the <code>advdata</code> information handy anyway, but you can write just the advertisement or scan response data with <code>ble_advdata_set</code> (which uses <code>sd_ble_gap_adv_data_set</code> after parsing the bytearray from the provided <code>ble_advdata_t</code> structs).</p> <p>You <em>can</em> use <code>ble_advdata_set</code> with your current setup, it will change the advertisement data just fine. However whenever you use <code>ble_advertising_start</code>, ble_advertising will overwrite the adv/sr data with the values you wrote at init.</p><div style="clear:both;"></div>