zephyr MTUhttps://devzone.nordicsemi.com/f/nordic-q-a/72286/zephyr-mtuHI: Now i am use the OTS to transmit image, if we want to set the MTU=185, how many paramter must config here? example: CONFIG_BT_CTLR_TX_BUFFER_SIZE=185 CONFIG_BT_CTLR_DATA_LENGTH_MAX=185 CONFIG_BT_RX_BUF_LEN=185 And, can you have some samplesen-USTelligent Community 13Wed, 03 Mar 2021 12:36:06 GMTRE: zephyr MTUhttps://devzone.nordicsemi.com/thread/297494?ContentTypeID=1Wed, 03 Mar 2021 12:36:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d1293c9-47dd-418e-b274-ce311678e579Amanda Hsieh<p>Hi Sam,&nbsp;</p> <p>You might need to modify</p> <p>CONFIG_BT_L2CAP_TX_MTU=185<br />CONFIG_BT_L2CAP_RX_MTU=185<br />CONFIG_BT_CTLR_TX_BUFFER_SIZE=189<br />CONFIG_BT_CTLR_DATA_LENGTH_MAX=189<br />CONFIG_BT_RX_BUF_LEN=193</p> <p>You can refer to the&nbsp;<a href="http://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/throughput/README.html">Throughput</a>&nbsp;sample which&nbsp;ATT_MTU size<span>&nbsp;is&nbsp;</span>247 bytes. See&nbsp;<a href="https://github.com/nrfconnect/sdk-nrf/blob/master/samples/bluetooth/throughput/prj.conf">https://github.com/nrfconnect/sdk-nrf/blob/master/samples/bluetooth/throughput/prj.conf</a></p> <p>-Amanda H.</p><div style="clear:both;"></div>