https://devzone.nordicsemi.com/f/nordic-q-a/53620/sending-two-dimensional-array-multi-dimensional-array-dataHello. I am currently making a data transmission program with BLE. We will create our own custom service and send it in “Notify” format. I want to send 2D array data. The following values ​​were assigned to the data in the “ble_gatts_hvx_params_t” structureen-USTelligent Community 13Thu, 24 Oct 2019 13:25:23 GMThttps://devzone.nordicsemi.com/thread/216645?ContentTypeID=1Thu, 24 Oct 2019 13:25:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fdb06d30-f4cd-428a-8633-778452afa2e3Amanda Hsieh<p>Hi,&nbsp;</p> <p></p> [quote user=""]Is it all converted to a one-dimensional array when sending data?[/quote] <p>Yes. You could send two packages or convert the&nbsp;<a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s110.api.v8.0.0/structble__gatts__hvx__params__t.html#a68325153be760c7742d1bec69da625cf">p_data</a>&nbsp;into a two-dimension array as you want on the receiver side.&nbsp;&nbsp;&nbsp;</p> <p></p> <p>-Amanda H.&nbsp;</p><div style="clear:both;"></div>