OptionalcaPEM CA bundle used to trust the gateway server certificate.
OptionalhostGateway host. Leave unset to use the broker the platform returned at enrollment; set it only to override that.
OptionalportTLS port. Overrides the enrolled broker's port; 8883 when host is set without a port.
OptionalrejectWhether to reject an untrusted server certificate. Defaults to true.
MQTT gateway connection settings.