Hello there,
I wanted to know, As I have Energy Meter x 20, all have same Modbus registers, I have created 2 pages, I wan to add drop down menu where I can select any device and dashboard starts showing the data of that particular device.
Welcome to the foru @ahsan.zahid.
Of course you need some way to distinguish one energy meter's data from another.
Often in Node-red you would have the unique name of the device in msg.topic, but any message property works too.
Then something like this will work:
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