PLC Modem/ABNT-14522 Library Data Structures

Here are the data structures with brief descriptions:

CommPLC	Power Line Communication class
CommSerial	Serial Communication class
CommUDP	UDP Communication class
Communication	Communication class
Leitor	Reader device class
lpmodem_params	Lpmodem KISS parameters
lpmodem_statistics	Lpmodem driver statistics
Medidor	Meter device class

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