Can you provide message filtering function?

[darcyg]

hi @EdJoPaTo . The payload of mqtt messages. A lot is a json or msgpack of arbitrary structure. For example, the cmnd information of tasmota returns stat/xxxxxx/RESULT

Since the message structure can be various data, such as {"ModbusSend":"done"} or {"Status":{....}}

Since ModbusSend is relatively frequent (1-3 times per second), other data are easily swiped and cannot be seen.

It is hoped that a filtering function can be provided to support the filtering format of jsonpath data. Filter and display the data, such as keeping only xxx or keeping everything except xxx.

thanks for your work