ATT error code: 0x0Ehttps://devzone.nordicsemi.com/f/nordic-q-a/121567/att-error-code-0x0eHi, my code will return ATT error code: 0x0E cyclically I have check some tickets and try to update my central device to Hoever, it still cannot, the error is like: bt_nus_client_send failed (err -120) 00&gt; [00:02:31.486,875] &lt;wrn&gt; central_uarten-USTelligent Community 13Sun, 18 May 2025 01:04:15 GMTRE: ATT error code: 0x0Ehttps://devzone.nordicsemi.com/thread/535867?ContentTypeID=1Sun, 18 May 2025 01:04:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:008bd2b1-4252-4a34-b372-38f2c42a3b79Ziyao Zhou<p>I found that add the&nbsp;conn_param timeout will solve this problem! Thank you!</p><div style="clear:both;"></div>