https://devzone.nordicsemi.com/f/nordic-q-a/30336/a-single-air-package-send-250byteI now use nrf52832 to do development, nrf52832 and mobile phones to transfer the data is relatively large, I would like to achieve For mobile phones that support BLE4.2, a single air package can send 250byte, for the unsupported phone to send 20 Bytesen-USTelligent Community 13Thu, 08 Feb 2018 15:57:43 GMThttps://devzone.nordicsemi.com/thread/120327?ContentTypeID=1Thu, 08 Feb 2018 15:57:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:410aa704-a4ab-4f14-a9a8-90d5f2d3eabcVidar Berg<p>Hi,</p> <p>You can use the SDK&nbsp;<a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/lib_ble_gatt.html?cp=4_0_0_3_2_10">GATT module</a>&nbsp;to request MTU and data length updates from the phone. It will still work with phones that do not support long MTU and DLE.&nbsp;&nbsp;</p><div style="clear:both;"></div>