t.p.n.NMEAProtocol(LineReceiver, _sentence._PositioningSentenceProducerMixin) : class documentation

A protocol that parses and verifies the checksum of an NMEA sentence (in string form, not NMEASentence), and delegates to a receiver.

It receives lines and verifies these lines are NMEA sentences. If they are, verifies their checksum and unpacks them into their components. It then wraps them in NMEASentence objects and calls the appropriate receiver method with them.

Parameters	_receiver	A receiver for NMEAProtocol sentence objects. (type: INMEAReceiver)
	_sentenceCallback	A function that will be called with a new NMEASentence when it is created. Useful for massaging data from particularly misbehaving NMEA receivers. (type: unary callable)

Method	__init__	Initializes an NMEAProtocol.
Method	lineReceived	Parses the data from the sentence and validates the checksum.
Class Variable	_SENTENCE_CONTENTS	Has the field names in an NMEA sentence for each sentence type (in order, obviously). (type: dict of bytestrings to lists of str)

Inherited from LineReceiver:

Class Variable	delimiter	The line-ending delimiter to use. By default this is b'\r\n'.
Class Variable	MAX_LENGTH	The maximum length of a line to allow (If a sent line is longer than this, the connection is dropped). Default is 16384.
Method	clearLineBuffer	Clear buffered data.
Method	dataReceived	Protocol.dataReceived. Translates bytes into lines, and calls lineReceived (or rawDataReceived, depending on mode.)
Method	setLineMode	Sets the line-mode of this receiver.
Method	setRawMode	Sets the raw mode of this receiver. Further data received will be sent to rawDataReceived rather than lineReceived.
Method	rawDataReceived	Override this for when raw data is received.
Method	sendLine	Sends a line to the other end of the connection.
Method	lineLengthExceeded	Called when the maximum line length has been reached. Override if it needs to be dealt with in some special way.

Inherited from Protocol (via LineReceiver):

Method	logPrefix	Return a prefix matching the class name, to identify log messages related to this protocol instance.
Method	connectionLost	Called when the connection is shut down.

Inherited from BaseProtocol (via LineReceiver, Protocol):

Method	makeConnection	Make a connection to a transport and a server.
Method	connectionMade	Called when a connection is made.

Inherited from _PauseableMixin (via LineReceiver):

Method	pauseProducing	Undocumented
Method	resumeProducing	Undocumented
Method	stopProducing	Undocumented

Inherited from _PositioningSentenceProducerMixin:

Class Method

getSentenceAttributes

Returns a set of all attributes that might be found in the sentences produced by this protocol.