I am trying to connect a custom device to the Azure IoT Hub using DPS service. Because I am using a custom board I am trying to write certificates to the modem using api calls to the modem_key_mgmg functions. Theses functions have a tag and a credential type.
But trying to get around the different certificates in use.and what tags and credential types i should use when writing the certificates.
I have registered Baltimore and DigiCert root CA certificates using the tag CONFIG_MQTT_HELPER_SEC_TAG and CONFIG_MQTT_HELPER_SECONDARY_SEC_TAG and both of them with credential type set to MODEM_KEY_MGMT_CRED_TYPE_PUBLIC_CERT.
For the device certificate I am not really sure what the tag should be, so just set it to 12 for both types.
Then the private certificate is registered with type MODEM_KEY_MGMT_CRED_TYPE_PRIVATE_CERT.
But what about the public part? Should it be MODEM_KEY_MGMT_CRED_TYPE_PUBLIC_CERT?
Is the above at all correct? I am wondering about the tag field since I find no description except a reserrved tag for nRFCloud. Is it used somewhere in the Nordic libraries for Azure and has to have a specific value?
I am getting mqtt_helper, mqtt_connect, error: -111 when trying to connect.
