Hi @Robbie98
can you share what the Debug output shows for the message coming from the SenseHat node? If I remember the node correctly (I did write it....), it sends a payload of {temperature: 12}.
I can see you have added a JSON node - that will be converting the object to a string. That will make it harder to access the individual values inside the string.
I think you just need the Change node between the SenseHat node and the gauge node, configured to set msg.payload to msg.payload.temperature.
