I am having trouble connecting my Uno Rev 2 securely to my MQTT Broker.
I've had a code where I've successfully connected the Arduino to a different broker but on a not-secured connection. There I have used the WiFiNINA and the PubSubClient libraries.
Since I need the connection to be secured, I've retrieved the CA Certificate, the Client Certificate and the Client Key but don't really know how I should handle them and what library I am able to use.
I know that the Wifi Module on the Uno Rev 2 is ESP32 based, but I could not get WiFiClientSecure, WiFiSSLClient,... running.
I'd greatly appreciate some help with this!