I'm finding that I'd like to have some data to send through my embryo OpenHAB MQTT module (running on the Unix port of micropython on my Linux PC).
That way I could check and quickly adjust the format of the messages being sent.
I haven't found an easy way to produce such data from the unix port, since the normal plugins (such as BME) have no hardware and produce no data values. So the MQTT is not trying to send anything for me to look at, even in the debug log.
Before I spend time producing something, has anyone already found a good solution? Perhaps a number-generating "plugin" independent of hardware?

Andrew.