Class: NMEAPlus::Message::NMEA::VTG

Inherits:
NMEAMessage show all
Defined in:
lib/nmea_plus/message/nmea/vtg.rb

Instance Attribute Summary collapse

Attributes inherited from NMEAMessage

#message_type, #talker

Attributes inherited from Base

#checksum, #data_type, #fields, #interpreted_data_type, #message_number, #next_part, #original, #payload, #prefix, #total_messages

Instance Method Summary collapse

Methods inherited from NMEAMessage

#_10_boolean, #_av_boolean

Methods inherited from Base

#_degrees_minutes_to_decimal, #_float, #_hex_to_integer, #_highest_contiguous_index, #_integer, #_interval_hms, #_nsew_signed_float, #_string, #_utc_date_time, #_utctime_hms, #add_message_part, #all_checksums_ok?, #all_messages_received?, #calculated_checksum, #checksum_ok?, field_reader, #highest_contiguous_index

Instance Attribute Details

#faa_mode ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/nmea_plus/message/nmea/vtg.rb', line 41

def faa_mode
  f = new_format? ? 9 : 100
  return nil if @fields[f].nil? || @fields[f].empty?
  @fields[f]
end

#speed_kmh ⇒ Float (readonly)

Returns:

  • (Float) 


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# File 'lib/nmea_plus/message/nmea/vtg.rb', line 33

def speed_kmh
  f = new_format? ? 7 : 4
  return nil if @fields[f].nil? || @fields[f].empty?
  @fields[f].to_f
end

#speed_knots ⇒ Float (readonly)

Returns:

  • (Float) 


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# File 'lib/nmea_plus/message/nmea/vtg.rb', line 25

def speed_knots
  f = new_format? ? 5 : 3
  return nil if @fields[f].nil? || @fields[f].empty?
  @fields[f].to_f
end

#track_degrees_magnetic ⇒ Float (readonly)

Returns:

  • (Float) 


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# File 'lib/nmea_plus/message/nmea/vtg.rb', line 17

def track_degrees_magnetic
  f = new_format? ? 3 : 2
  return nil if @fields[f].nil? || @fields[f].empty?
  @fields[f].to_f
end

#track_degrees_true ⇒ Object (readonly)

Returns field 1 of the payload, formatted with the function Base#_float.

Returns:

  • field 1 of the payload, formatted with the function Base#_float



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# File 'lib/nmea_plus/message/nmea/vtg.rb', line 13

field_reader :track_degrees_true, 1, :_float

Instance Method Details

#new_format? ⇒ bool

whether this is the new format. docs say check field #2 for value “2”

Returns:

  • (bool) 


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# File 'lib/nmea_plus/message/nmea/vtg.rb', line 9

def new_format?
  'T' == @fields[2]
end