9756538f16
Organizes 11 projects for Cerbo GX/Venus OS into a single repository: - axiom-nmea: Raymarine LightHouse protocol decoder - dbus-generator-ramp: Generator current ramp controller - dbus-lightning: Blitzortung lightning monitor - dbus-meteoblue-forecast: Meteoblue weather forecast - dbus-no-foreign-land: noforeignland.com tracking - dbus-tides: Tide prediction from depth + harmonics - dbus-vrm-history: VRM cloud history proxy - dbus-windy-station: Windy.com weather upload - mfd-custom-app: MFD app deployment package - venus-html5-app: Custom Victron HTML5 app fork - watermaker: Watermaker PLC control UI Adds root README, .gitignore, project template, and per-project .gitignore files. Sensitive config files excluded via .gitignore with .example templates provided. Made-with: Cursor
114 lines
2.7 KiB
Python
114 lines
2.7 KiB
Python
"""
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Depth-related NMEA sentences.
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DPT - Depth
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DBT - Depth Below Transducer
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"""
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from typing import Optional
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from ..sentence import NMEASentence
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class DPTSentence(NMEASentence):
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"""DPT - Depth of Water.
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Format:
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$IIDPT,D.D,O.O,R.R*CC
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Fields:
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1. Depth in meters (relative to transducer)
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2. Offset from transducer in meters
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- Positive = distance from transducer to water line
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- Negative = distance from transducer to keel
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3. Maximum range scale in use (optional)
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Example:
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$IIDPT,12.5,0.5,100*4C
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Note:
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To get depth below keel: depth + offset (when offset is negative)
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To get depth below surface: depth + offset (when offset is positive)
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"""
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talker_id = "II"
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sentence_type = "DPT"
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def __init__(
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self,
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depth_m: Optional[float] = None,
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offset_m: float = 0.0,
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max_range: Optional[float] = None,
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):
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"""Initialize DPT sentence.
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Args:
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depth_m: Depth in meters (relative to transducer)
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offset_m: Offset from transducer in meters
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max_range: Maximum range scale in meters
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"""
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self.depth_m = depth_m
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self.offset_m = offset_m
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self.max_range = max_range
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def format_fields(self) -> Optional[str]:
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"""Format DPT fields."""
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if self.depth_m is None:
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return None
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range_str = f"{self.max_range:.0f}" if self.max_range is not None else ""
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return f"{self.depth_m:.1f},{self.offset_m:.1f},{range_str}"
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class DBTSentence(NMEASentence):
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"""DBT - Depth Below Transducer.
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Format:
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$IIDBT,D.D,f,D.D,M,D.D,F*CC
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Fields:
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1. Depth in feet
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2. f = Feet
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3. Depth in meters
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4. M = Meters
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5. Depth in fathoms
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6. F = Fathoms
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Example:
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$IIDBT,41.0,f,12.5,M,6.8,F*2B
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Note:
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Depth is measured from the transducer to the bottom.
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Does not include offset to keel or waterline.
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"""
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talker_id = "II"
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sentence_type = "DBT"
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# Conversion constants
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FEET_PER_METER = 3.28084
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FATHOMS_PER_METER = 0.546807
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def __init__(self, depth_m: Optional[float] = None):
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"""Initialize DBT sentence.
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Args:
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depth_m: Depth in meters
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"""
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self.depth_m = depth_m
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def format_fields(self) -> Optional[str]:
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"""Format DBT fields."""
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if self.depth_m is None:
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return None
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depth_ft = self.depth_m * self.FEET_PER_METER
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depth_fathoms = self.depth_m * self.FATHOMS_PER_METER
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return (
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f"{depth_ft:.1f},f,"
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f"{self.depth_m:.1f},M,"
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f"{depth_fathoms:.1f},F"
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)
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