https://devzone.nordicsemi.com/f/nordic-q-a/111707/notification-not-sent-on-some-characteristicsHello, I work on custom device with custom FW, SDK16 S132 7.0.1 and NRF52832. I have a custom service that have some custom characteristics. my configuration: CHAR 1: write without response + Notification; secure write encrypt (char 1 used toen-USTelligent Community 13Mon, 03 Jun 2024 11:30:00 GMThttps://devzone.nordicsemi.com/thread/487105?ContentTypeID=1Mon, 03 Jun 2024 11:30:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b8f4b9d6-db27-4d73-abb0-f92c2f5aa639Simonr<p>Hi</p> <p>It&#39;s hard to say without looking at your code, but it sounds like somehow CHAR 2 takes precedence or disables the other characteristics when you enable notifications on it. Does it also occur if you first enable CHAR 2 and then enable CHAR 1 or is it always CHAR 2 that seems to &quot;overwrite&quot; the others? How exactly do you enable CHAR 2 on your end in the code? A code snippet might be useful. Also sniffing the connection to see what happens over the air might be helpful. Etiher a dedicated sniffer or an nRF52 DK with the <a href="https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/intro.html">nRF Sniffer firmware</a> can be used for that.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>