Help needed configuring MQTT switch


I need a little advice please.

I have 2 MQTT switches I am trying to configure.

The command which needs to be sent needs to be sent in base64, however I need to declare a port on which to communicate in addition to the payload.

The format needs to be as follows:

The default topic for scheduling downlink payloads is:


The Application ID and DevEUI of the device will be taken from the topic.

Example payload:

    "devEui": "1234567890123456",
    "confirmed": false,
    "fPort": 85,
    "data": "CAAA/w=="

Can I use this in a template in the payload on and payload off?

Many thanks