https://devzone.nordicsemi.com/f/nordic-q-a/37352/insufficient-encryption-failure-notice-as-write-responseHi Technical Team, nRF52832DK is running on central role with the below SDK version : 12.3 IDE :IAR It is working (connection,just work pairing,bonding, &amp; reading/writing the characteristics) with the peripheral BLE device and the device is disconnecteden-USTelligent Community 13Fri, 10 Aug 2018 12:31:29 GMThttps://devzone.nordicsemi.com/thread/143721?ContentTypeID=1Fri, 10 Aug 2018 12:31:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:420221b7-72cf-4532-91d9-46233ff319adJared<p>Hi</p> <p>Example code for writing to a characteristics is found at :&nbsp;<a href="https://github.com/bjornspockeli/custom_ble_service_example">https://github.com/bjornspockeli/custom_ble_service_example</a></p> <p>The example sets up a custom service that enables writing to a characteristic value. The handling of write events from the softdevice is also shown in the tutorial.&nbsp;</p> <p></p> <p>Jared</p><div style="clear:both;"></div>