Hi,
I have a similar need for my TRB255. I need to be able to monitor and control my IO-pins
via MQTT. After some testing and reading documentation back and forth I understand that control
is not supported. This is quite disappointing since MQTT support was one of the features that convinced me
to purchase the TRB255. Both JSON-RPC and HTTP post/get seems clumsy compared to MQTT. Having to send user/passwords is not that "up to date" in the IoT world. I have MQTT up and running over TLS and would like to also control the device. Second, it seems like I can only pull pin status from the TRB, I was expecting the device to publish changes (pulling is costly).
I hope that this is something that can be supported within reasonable time.
/Björn