https://devzone.nordicsemi.com/f/nordic-q-a/42306/long-write-too-longhello I have once again issues when I want to write a &#39;long&quot; characteristic e.g. 85 bytes. 1) if I use a smaller MTU e.g. 23 or 50, I received corrtectly the User Memory request, and directly the USER MEM RELEASE without the intermediary writesen-USTelligent Community 13Tue, 15 Jan 2019 08:17:25 GMThttps://devzone.nordicsemi.com/thread/165653?ContentTypeID=1Tue, 15 Jan 2019 08:17:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f9e96f02-f067-44c7-8a6e-361130135b37Simon<p>Is your issue resolved?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/164880?ContentTypeID=1Thu, 10 Jan 2019 11:37:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01027b67-6a86-4c47-8a34-502f909401e7yacine<p>dear community,&nbsp;I found my bug which was not related to MTU or paylod size. the treatment of the data was the reason (error in the write_handler)</p><div style="clear:both;"></div>