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package nmea
const (
// TypeRPM type of RPM sentence for Engine or Shaft revolutions and pitch
TypeRPM = "RPM"
// SourceEngineRPM is value for case when source is Engine
SourceEngineRPM = "E"
// SourceShaftRPM is value for case when source is Shaft
SourceShaftRPM = "S"
)
// RPM - Engine or Shaft revolutions and pitch
// https://gpsd.gitlab.io/gpsd/NMEA.html#_rpm_revolutions
//
// Format: $--RPM,a,x,x.x,x.x,A*hh<CR><LF>
// Example: $RCRPM,S,0,74.6,30.0,A*56
type RPM struct {
BaseSentence
Source string // Source, S = Shaft, E = Engine
EngineNumber int64 // Engine or shaft number
SpeedRPM float64 // Speed, Revolutions per minute
PitchPercent float64 // Propeller pitch, % of maximum, "-" means astern
Status string // Status, A = Valid, V = Invalid
}
// newRPM constructor
func newRPM(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeRPM)
return RPM{
BaseSentence: s,
Source: p.EnumString(0, "source", SourceEngineRPM, SourceShaftRPM),
EngineNumber: p.Int64(1, "engine number"),
SpeedRPM: p.Float64(2, "speed"),
PitchPercent: p.Float64(3, "pitch"),
Status: p.EnumString(4, "status", StatusValid, StatusInvalid),
}, p.Err()
}
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