https://devzone.nordicsemi.com/f/nordic-q-a/19705/long-write-with-lightblue-iphone6I want to send several packages in one interval from my iphone to 51822(s130).But the demo ble_app_uart can only receive 1 package per interval（ipone6，lightbule，writewithoutreponse）。 I use the iphone6 with lightblue to test the long write（write withen-USTelligent Community 13Thu, 16 Feb 2017 08:26:32 GMThttps://devzone.nordicsemi.com/thread/76668?ContentTypeID=1Thu, 16 Feb 2017 08:26:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b4b92578-3ddb-4c1d-8349-3abb56df23f3run_ar<p>Which S130 version is this? How did you configure the bandwidth? e.g BLE_OPT_CONN_BW_SET</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/76670?ContentTypeID=1Wed, 15 Feb 2017 07:37:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78eed192-fa1a-428f-935d-9716886d1501mark_peng<p>hi caram5555. I know the max byte of package is 20.I want to improve the throughout of my device(use 51822). Another device ,I was used cc2541 to connect the iphone6(app is lightblue), it could written several package in one interval. So I want to nrf51822 could transfer several package in one interval. Now my 51822 could only transfer only one package in one interval.The 51822&#39;s throughput is better than CC2541,the problem maybe is I did not use it. If I use long write can transfer several packages in one interavl?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/76669?ContentTypeID=1Wed, 15 Feb 2017 07:26:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a49e9b2a-8332-4543-aa08-cc3fb5a59c28caram5555<p>Hi Mark. If you look at the specification, max transfer is limited to 20bytes. I recommend you to split your packet into 20bytes block and re-assemble. Regards.</p><div style="clear:both;"></div>