@storepeter You can set VAR1 type to double to see graph value. I do not remember exactly it can be shown on a mixed sensor graph. Just give a try. Enable unique name may differentiate your sensors

@storepeter said in how do I make the build-in MQTT broker work ?: There is one minor difference - when using the serial gateway all my repeaters were interconnected with lines, now they are all islands. Before I believe that only non-repeater showed as unconnected. I kind of liked that distinction - Why is this so ? There is no difference in MyController side for MQTT or Serial. On gateway, page select the gateway and execute Discover. [image: 1525272976811-1a98f50c-8784-4b84-9f4c-5a5e37b3662e-image-resized.png] Discover job will be executed 30 minutes once I guess(default). [image: 1525272844235-ce0d2348-e066-4966-93eb-8a833563164a-image-resized.png] Your MQTT gateway RF may be weaker than serial gateway RF. When enabling ack for your gateway might resolve this issue. If the message failed to send, MyController retries N(in this image 5 times) times in the interval of 1 second(1000 ms). [image: 1525273083297-4ee37fa4-470d-4af9-a8e2-ad2fd4684493-image.png]