Bluetooth LE Fundamental, Lesson 3 Exercise 2 question about datalength and MTU settingshttps://devzone.nordicsemi.com/f/nordic-q-a/114173/bluetooth-le-fundamental-lesson-3-exercise-2-question-about-datalength-and-mtu-settingsDear Team, into the Connection parameters chapeter of the Lesson 3 is stated that The relation between data length and MTU is not one-to-one. On air, the data length can be up to 251 bytes, while the actual payload that you can send is a maximum ofen-USTelligent Community 13Mon, 26 Aug 2024 09:50:44 GMTRE: Bluetooth LE Fundamental, Lesson 3 Exercise 2 question about datalength and MTU settingshttps://devzone.nordicsemi.com/thread/499708?ContentTypeID=1Mon, 26 Aug 2024 09:50:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d418d22a-a0bf-4941-851f-c247e846d7ecSTE<p>Thanks.</p> <p>Best regards.</p> <p>Fabio</p><div style="clear:both;"></div>RE: Bluetooth LE Fundamental, Lesson 3 Exercise 2 question about datalength and MTU settingshttps://devzone.nordicsemi.com/thread/499700?ContentTypeID=1Mon, 26 Aug 2024 09:15:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:755e88ad-6d57-4ab6-bc01-eb3ddfd5d5ceVidar Berg<p>Hello,</p> <p>The L2CAP MTU should be large enough to&nbsp;hold the desired payload plus the 3-byte ATT header. For example, if the desired (write/notify) payload is 244 bytes, the L2CAP MTU should be 247 bytes (244 + 3).</p> <p><img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/1616.pastedimage1724653171117v1.png" alt=" " /></p> <p></p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>