https://devzone.nordicsemi.com/f/nordic-q-a/55783/long-write-characteristicHi All, I want to read/write long characteristic (200 bytes max) from Android to my device. I&#39;m working on the 15.2.0 SDK and S140 Softdevice. I read some Q&amp;A on the forum, but I still confused on the right method to use : Use Queued Writesen-USTelligent Community 13Wed, 18 Dec 2019 13:35:32 GMThttps://devzone.nordicsemi.com/thread/226159?ContentTypeID=1Wed, 18 Dec 2019 13:35:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c0d5d1b9-2736-4849-a926-a216280e3f38Einar Thorsrud<p>Hi&nbsp;Pascal,</p> <p>First of all, you should not make any assumptions about the GAP data length if you intend to support a wide range of phones, as that depends significantly.</p> <p>If by long write, you mean queued writes, you can refer to for instance the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_ble_queued_write.html">queued writes library</a> and&nbsp; <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/ble_sdk_app_queued_writes.html">Queued Writes Application example</a>. This is clean, since you first transfer all the new data, and then activate it. (See <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.0.1/group___b_l_e___g_a_t_t_c___v_a_l_u_e___l_o_n_g___w_r_i_t_e___m_s_c.html">MSC seen from the client</a>).</p> <p>Einar</p><div style="clear:both;"></div>