https://devzone.nordicsemi.com/f/nordic-q-a/26292/changing-characteristic-s-length-after-initial-declarationHi everyone, I wanted to know if it&#39;s possible to change the length of a characteristic&#39;s value after it has been put in the attribute table. Reading some other answers in this zone, I found it was possible to change a characteristic&#39;s value afteren-USTelligent Community 13Thu, 26 Oct 2017 22:46:53 GMThttps://devzone.nordicsemi.com/thread/103491?ContentTypeID=1Thu, 26 Oct 2017 22:46:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bd574ee7-82f0-446b-9357-449e1683ebcbJos&#233; Villanueva<p>Hi RK, at first I noticed the same but I didn&#39;t know how to do that. I was searching for a specific function to do that for me because I could not access to this attribute but I didn&#39;t find one in any of the library files. Then I realized the way to do that was setting <code>vlen = 1</code>, which allowed me to have a variable length value for my characteristic so I could write as most the number of bytes defined in <code>max_len</code> and read just the bytes desired in my application. Thanks!!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/103490?ContentTypeID=1Wed, 25 Oct 2017 22:44:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:162eaff6-d6ad-4649-a7e5-a846171fc622RK<p>well yes - that&#39;s why there&#39;s a max_len and an initial len. The first is how much space to reserve, the second is how long the characteristic value currently is. You can&#39;t change the first, you can change the second on any and every update.</p><div style="clear:both;"></div>