https://devzone.nordicsemi.com/f/nordic-q-a/8987/ble-uart-slowHello, I used ble_app_uart_c and ble_app_uart exemples on 2 tiny ble boards and S130. Write and notifications are very slow. Does someone have an idea ? Connection settings : #define MIN_CONNECTION_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MSen-USTelligent Community 13Wed, 02 Sep 2015 10:40:57 GMThttps://devzone.nordicsemi.com/thread/33079?ContentTypeID=1Wed, 02 Sep 2015 10:40:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:57c76c16-8a90-42e4-8dfc-afb405fc4c74Stefan Birnir Sverrisson<p>Hi Fabien</p> <p>It is strange that slow writes and notifications are dependent on scan interval and window. There is no notification or write possible without connecting first. So if you make a larger scan window that will enable the devices to connect sooner and make your device perform notifications/writes sooner. Is that perhaps what is going on.</p> <p>Are you able to <a href="https://www.nordicsemi.com/eng/nordic/Products/nRF51822/nRF-Sniffer/26386">sniff the on air packets</a> in order to know what is going on?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/33078?ContentTypeID=1Mon, 31 Aug 2015 13:19:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:304eb163-f17d-4e0a-9be6-937646dd8e6dFabien Comte<p>result depend on scan interval and scan window. I don&#39;t understand why ?</p><div style="clear:both;"></div>