I am currently able to display all 4 of my sensors but i am not sure how to code the python function node such that each output goes to it respective gauge. The following are my nodes and the code that I used to run the node called "Python File".
If that node can output an object (or you may need a json node to convert a json string) - then the gauges can be set to point at individual properties eg
based on your picture above, does x meant by the variable i used to display the output of my sensor?
well I have no idea what your existing payload looks like.... as long as it an object with properties you can point the gauge at them...
Thanks 
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