https://devzone.nordicsemi.com/f/nordic-q-a/84440/mqtt-failed-to-provision-ca-certificate--14Hi I have five custom boards, same batch. I used one of the boards for developing FW, based on the MQTT simple sample. The FW uses CA certificates in an h file like the simple sample example. When i flash the same FW to the four other boardsen-USTelligent Community 13Mon, 07 Feb 2022 13:14:31 GMThttps://devzone.nordicsemi.com/thread/351547?ContentTypeID=1Mon, 07 Feb 2022 13:14:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:72e43ebf-7f18-4910-a59c-6b51b8b74b01H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>You can issue at command AT+CGMR:</p> <p><a href="https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/general/cgmr_set.html?cp=2_1_3_2_0">https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/general/cgmr_set.html?cp=2_1_3_2_0</a></p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/351536?ContentTypeID=1Mon, 07 Feb 2022 12:46:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01cc8305-ea57-47d8-bd12-fb5159bb8290FZe<p>Yes I did, on one of the boards.</p> <p>How do I verify witch FW the modem has?</p> <p>Regards</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/351525?ContentTypeID=1Mon, 07 Feb 2022 12:32:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e54adc7f-5127-429b-910f-d60471c14d69H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> [quote user=""]I get the same error the remaining four boards, but not on my first initial board.[/quote] <p>Did you update the modem fw on your four boards, to the same that it on the initial board?</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>