https://devzone.nordicsemi.com/f/nordic-q-a/8953/ble-securityHello, Using BLE Scanner app (available for Android), i&#39;m able to change the device name. I can also write other values for each characteristic. How can we protect a BLE Network from Writing ? (Read only) Thanks.en-USTelligent Community 13Sat, 29 Aug 2015 01:43:39 GMThttps://devzone.nordicsemi.com/thread/32973?ContentTypeID=1Sat, 29 Aug 2015 01:43:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d388a05a-e369-4b07-9d51-335773b7ae98RK<p>Change the flags on the characteristics&#39; meta data character properties to only have &#39;read&#39;, you can also set the security mode for write to &#39;no access&#39;</p> <pre><code>// configure the characteristic metadata - everything is readable only char_md.char_props.read = 1; // configure the attribute metadata BLE_GAP_CONN_SEC_MODE_SET_OPEN( &amp;attr_md.read_perm ); BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS( &amp;attr_md.write_perm ); </code></pre><div style="clear:both;"></div>