Change icon in button

[Andrei]

I would suggest having a look on this example from the FAQs:

Examples of Colour change button and switch

A simple example of a button that has two states and changes colour/text and icon based on those two states [{"id":"b9a70965.13e138","type":"ui_button","z":"d511095d.512808","name":"","group":"c070ecdb.6d5ce","order":0,"width":"0","height":"0","passthru":false,"label":"{{payload}}","color":"","bgcolor":"{{colour}}","icon":"","payload":"press","payloadType":"str","topic":"","x":590,"y":615,"wires":[["48aaee20.8d9e1"]]},{"id":"5cc84101.ac6d9","type":"change","z":"d511095d.512808","name":"","rules…