https://devzone.nordicsemi.com/f/nordic-q-a/22037/coap-udp-mtu-over-6lowpan-with-iot-sdkHi, What is available MTU of CoAP and UDP over 6lowpan with IoT SDK ? In my application, I need to transfer dozens of kb data to ble node over 6lowpan with iot SDK. Do I need do package fragmentation and composition myself ? Have the iot sdk implementeden-USTelligent Community 13Thu, 18 May 2017 13:31:59 GMThttps://devzone.nordicsemi.com/thread/86471?ContentTypeID=1Thu, 18 May 2017 13:31:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64372afc-63ca-4fda-a2c2-d0586a972c87Petter Myhre<p>The maximum MTU of the 6LoWPAN implementation in the IoT SDK is 1280 bytes.</p> <p>The fragmentation and reassembly is handled by the L2CAP layer.</p><div style="clear:both;"></div>