https://devzone.nordicsemi.com/f/nordic-q-a/78126/responding-to-mtu-requestsHello, What&#39;s the correct way to respond to MTU requests with pc-ble-driver-js library ? on a pair of nRF52840 USB Dongles, using nRF Connect for Desktop, project based on pc-nrfconnect-boilerplate Calling requestAttMtu() on one device starts theen-USTelligent Community 13Mon, 02 Aug 2021 15:46:53 GMThttps://devzone.nordicsemi.com/thread/322941?ContentTypeID=1Mon, 02 Aug 2021 15:46:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:079e9a0b-a821-48ea-b3c0-d69ae796ce4fHung Bui<p>Hi,<br />Our expert in pc-ble-driver-js is currently on vacation, I will try to help in the mean time. If you have a look at <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.3.0/group___b_l_e___g_a_t_t_s___m_t_u___e_x_c_h_a_n_g_e.html?cp=4_7_3_1_2_4_3_1">this sequence chart </a>the application should return with sd_ble_gatt_exchange_mtu_reply().<br /> <br />As far as I can see in the js library , you would need to call attMtuReply() . If you have a look <a href="https://github.com/NordicSemiconductor/pc-ble-driver-js/blob/master/test/connection.test.js#L132">here</a> you can see how it&#39;s handled.<br /><a href="https://devzone.nordicsemi.com/f/nordic-q-a/72937/pc-ble-driver-js-disconnects-after-30-seconds-for-no-reason">This devzone case </a>might be useful as well.&nbsp;</p><div style="clear:both;"></div>