I have been having an issue getting the MQTT input block to connect to my emonPi (raspberry pi system by openenergymonitor). When I connect to the emonPi via SSH through putty, I am able to view all of the MQTT messages. This to me means that everything is working fine on that end, but I could be wrong. When I try to connect the pi to nodered using the mqtt input, I have not been able to connect. My first thought is is there password authentication required before accessing the info passed by MQTT? Thank you for your help.