Set up MTU and DLE with SD 132 ver 4https://devzone.nordicsemi.com/f/nordic-q-a/25370/set-up-mtu-and-dle-with-sd-132-ver-4Hello community, I have a central device which I implemeted, it is running with SD 132 v 4 (&quot;NRF_SD_BLE_API_VERSION=4&quot;) ) the chip is a NRF52832, I have some movement sensors which are able to send 8,20 and 30 bytes. Until 20 bytes my central is recevingen-USTelligent Community 13Fri, 22 Sep 2017 12:14:36 GMTRE: Set up MTU and DLE with SD 132 ver 4https://devzone.nordicsemi.com/thread/99982?ContentTypeID=1Fri, 22 Sep 2017 12:14:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f75b459a-16eb-49d0-b4bd-d095360ca73eSigurd<p>Hi,</p> <p>In SDK 13(where S132 v.4 is used) we have a GATT library that should handle this for you. Take a look at e.g. ble_app_uart example. MTU is set with <code>nrf_ble_gatt_att_mtu_periph_set()</code> in <code>gatt_init()</code>.</p> <p>Regarding the fatal error, you should debug to find the error code and find out where in the code the error occurs. See <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/">this post</a> on how to do that.</p><div style="clear:both;"></div>