Check out my YouTube channel as I’m sure I covered it on their but I uploaded a tone of programs to my Adam Bryant GitHub repository

@rob-driver1970 it won’t, you have published and subscribed to 2 different topics

Have you burned the correct Core firmware as there is several different cores with different screens. A blank screen is often a sign of the wrong core firmware

API keys only apply to UIFlow 1, UIFLOW2 binds controllers to your account when to burn the firmware

We need to see code in order to help.
I have a core2 AWS that sends to a mosquito server on and RPI and it works fine

Have you tried using just the time only or hour and minute only blocks?

@gavin67890 I think they are injection moulded ABS

@felmue there is also a king running issue with the ENV III unit

StickC (Not Plus) reports RoverC not connected.

Look in the Discussion about the ENV III and the Core S3