question about CONFIG_NRF_CLOUD_PROVISION_CERTIFICATES

Question

Hi, 
 If I understand corrctly, the flag CONFIG_NRF_CLOUD_PROVISION_CERTIFICATES=y should only be used once, 
 after that, the certificates are saved inside the modem. 
 
 when I disable this flag, the nordic would not connect due to certificate issue. 
 any thoughts?

Martin Lesund · Accepted Answer

Hi Moshe, 
 Your assumption would be correct. 
 Please update your modem firmware to the newest version: https://www.nordicsemi.com/Products/Low-power-cellular-IoT/nRF9160/Download#infotabs 
 It may actually be the cause for your issue, since I remember that there was an issue with an older modem firmware with regards to this. 
 IMPORTANT NOTE: 
 
 There is a bug in the modem firmware version -> "mfw_nrf9160_0.7.0-15.alpha" which makes it start in "nb-iot mode" as default. To change to the "LTE-M" mode you need to send an AT-Command. - AT%XSYSTEMMODE =1,0,0,0 and then AT+CFUN=0 to save the changes into the modem flash.

When you restart your device it will now go into the LTE-M mode. 
 
 For your convenience I have added a precompiled .hex file which has merged the "at_client" and the "spm" (secure partition manager) ( before: secure_boot): at_client.hex Please flash via the command line: nrfjprog --program at_client.hex -f nrf91 --sectorerase -r --verify 
 And then connect the board and run the LTE link Monitor.

Send the command " AT+CGMR " to verify that the modem firmware has been updated to the correct version.

Best regards, 
 Martin L.

question about CONFIG_NRF_CLOUD_PROVISION_CERTIFICATES

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