https://devzone.nordicsemi.com/f/nordic-q-a/7657/cable-replacement-serviceHi everyone for my application I must use the Bluegiga dongle like central (PC side) and nRF51822 for peripheral (hardware side). So I implemented cable replacement app and I created a new service starting from ble_nus.c (see ble_app_uart example) anden-USTelligent Community 13Mon, 05 Oct 2015 14:05:05 GMThttps://devzone.nordicsemi.com/thread/27278?ContentTypeID=1Mon, 05 Oct 2015 14:05:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4bdd4644-7f5f-4f6d-b7f3-a171fbbb190eStian R&#248;ed Hafskjold<p>20 bytes is the maximum data size. You need to split up you data in several indications. Check out this thread: <a href="https://devzone.nordicsemi.com/question/1741/dealing-large-data-packets-through-ble/">devzone.nordicsemi.com/.../</a></p> <p>This thread discusses notifications, but you can use this for indications as well. I guess the indication confirmation send by the client is used as flow control to tell you if it is ready to receive more data.</p><div style="clear:both;"></div>