I am using something called advantech lorawan gateway and I would like to transfer the data from sensors directly to the cloud via the gateway. I am using node red and I would like to upload ssl certificates for the private cloud using mqtt out. But I am always facing the same problem while trying to upload them, which is error :C file not found, despite the fact that all certificates are located in the same path with .crt extension.
Does the problem related to the extension? should it be changed from .crt to .pem in order to be able to use it?
How such thing might be possible on advantech 6610 lorawan gateway, should I add certain packages in order to be able to do this?