What are trying to achieve? Please describe in detail.
Enable remote configuration management of devices connected via MQTT
we need to enable the retrieve of a snapshot config file from an MQTT device. When the device receive the 520 command via MQTT how should it reply back to send the binary config file? Is there a static Smartrest template to send the config file?
The exact flow of messages sent by the platform and messages expected from your device depends on the variant of configuration you want to integrate. We have a step by step guide of all three configuration variants with upload and download here in our documentation: Device management library - Cumulocity IoT Guides