[ { "id": "774e520b07be29b8", "type": "tab", "label": "Virtual boat trip", "disabled": false, "info": "", "env": [] }, { "id": "128160fb55d6409d", "type": "inject", "z": "774e520b07be29b8", "name": "", "props": [ { "p": "payload" }, { "p": "topic", "vt": "str" } ], "repeat": "10", "crontab": "", "once": true, "onceDelay": 0.1, "topic": "", "payload": "", "payloadType": "date", "x": 190, "y": 100, "wires": [ [ "e4373dfeeaee8d7f" ] ] }, { "id": "e4373dfeeaee8d7f", "type": "function", "z": "774e520b07be29b8", "name": "Boattrip: Gibraltar to Florida", "func": "// Route waypoints (Mediterranean -> Florida -> Mediterranean)\nconst route = [\n { lat: 36.4072, lon: -5.1600, name: \"Gibraltar\" }, // Start/End at Gibraltar\n { lat: 28.4698, lon: -16.2549, name: \"Canary Islands\" }, // Common Atlantic crossing point\n { lat: 25.7617, lon: -80.1918, name: \"Miami\" }, // Florida destination\n { lat: 24.5557, lon: -81.7826, name: \"Key West\" }, // Florida Keys\n { lat: 25.7617, lon: -80.1918, name: \"Miami\" }, // Start return journey\n { lat: 38.6971, lon: -27.2276, name: \"Azores\" }, // Return via Azores\n { lat: 36.4072, lon: -5.1600, name: \"Gibraltar\" } // Back to start\n];\n\n// Initialize or update state\nlet state = context.get('boatState');\nif (!state) {\n // First time - create new state and check for existing GPS position\n const globalContext = context.global;\n const currentLat = globalContext.get('victronenergy.gps._100.Position.Latitude');\n const currentLon = globalContext.get('victronenergy.gps._100.Position.Longitude');\n const currentCourse = globalContext.get('victronenergy.gps._100.Course');\n\n let initialSegment = 0;\n let initialProgress = 0;\n\n // If we have a current position, find closest point on route\n if (currentLat && currentLon) {\n let minDistance = Infinity;\n let bestSegment = 0;\n let bestProgress = 0;\n\n // Check each route segment\n for (let i = 0; i < route.length - 1; i++) {\n const start = route[i];\n const end = route[i + 1];\n\n // Find closest point on this segment\n for (let progress = 0; progress <= 1; progress += 0.01) {\n const testPos = interpolatePosition(start, end, progress);\n const distance = calculateDistance(currentLat, currentLon, testPos.lat, testPos.lon);\n\n if (distance < minDistance) {\n minDistance = distance;\n bestSegment = i;\n bestProgress = progress;\n }\n }\n }\n\n // Only use the found position if it's reasonably close (within 50km)\n if (minDistance < 50) {\n initialSegment = bestSegment;\n initialProgress = bestProgress;\n node.warn(`Resuming trip from segment ${bestSegment} at ${Math.round(bestProgress * 100)}% progress (${Math.round(minDistance)}km from route)`);\n } else {\n node.warn(`Current position too far from route (${Math.round(minDistance)}km), starting from Gibraltar`);\n }\n } else {\n node.warn('No current GPS position found, starting from Gibraltar');\n }\n\n state = {\n currentSegment: initialSegment,\n progress: initialProgress,\n direction: 1,\n startTime: new Date().getTime(),\n satellites: 12\n };\n}\n\n// Function to calculate distance between two points using Haversine formula\nfunction calculateDistance(lat1, lon1, lat2, lon2) {\n const R = 6371; // Earth's radius in km\n const dLat = (lat2 - lat1) * Math.PI / 180;\n const dLon = (lon2 - lon1) * Math.PI / 180;\n const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +\n Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *\n Math.sin(dLon / 2) * Math.sin(dLon / 2);\n const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n return R * c;\n}\n\n// Function to interpolate between two points\nfunction interpolatePosition(start, end, progress) {\n return {\n lat: start.lat + (end.lat - start.lat) * progress,\n lon: start.lon + (end.lon - start.lon) * progress\n };\n}\n\n// Update position\nconst timeElapsed = (new Date().getTime() - state.startTime) / 1000; // seconds\nconst averageSpeed = 8; // km/h (realistic cruising speed)\nconst distancePerSecond = averageSpeed / 3600; // km/second\n\n// Add some speed variation (±20%)\nconst speedVariation = 0.8 + (Math.random() * 0.4);\nconst adjustedDistance = distancePerSecond * speedVariation * timeElapsed;\n\n// Get current segment points\nconst startPoint = route[state.currentSegment];\nconst endPoint = route[(state.currentSegment + 1) % route.length];\n\n// Calculate segment length\nconst segmentDistance = calculateDistance(startPoint.lat, startPoint.lon, endPoint.lat, endPoint.lon);\n\n// Update progress\nstate.progress += adjustedDistance / segmentDistance;\n\n// Update satellite count occasionally (every ~5 minutes)\nif (Math.random() < 0.01) { // 1% chance each update\n // Base satellite count 8-14\n let newSatCount = 8 + Math.floor(Math.random() * 7);\n\n // Occasional poor reception (5% chance)\n if (Math.random() < 0.05) {\n newSatCount = 3 + Math.floor(Math.random() * 4); // 3-6 satellites\n }\n\n state.satellites = newSatCount;\n}\n\n// Check if we've completed current segment\nif (state.progress >= 1) {\n state.currentSegment = (state.currentSegment + 1) % route.length;\n state.progress = 0;\n state.startTime = new Date().getTime();\n}\n\n// Calculate current position\nconst currentPosition = interpolatePosition(startPoint, endPoint, state.progress);\n\n// Add small random variations to simulate GPS jitter (±0.0001 degrees)\nconst jitter = 0.0001;\ncurrentPosition.lat += (Math.random() - 0.5) * jitter;\ncurrentPosition.lon += (Math.random() - 0.5) * jitter;\n\n// Calculate heading based on current segment\nconst heading = Math.atan2(\n endPoint.lon - startPoint.lon,\n endPoint.lat - startPoint.lat\n) * 180 / Math.PI;\n\n// Calculate speed in knots (with variation)\nconst speedKnots = averageSpeed * speedVariation * 0.539957; // Convert km/h to knots\n\n// Save state\ncontext.set('boatState', state);\n\n// Update node status\nconst progressPercent = Math.round(state.progress * 100);\nnode.status({\n fill: \"blue\",\n shape: \"dot\",\n text: `${startPoint.name} → ${endPoint.name} (${progressPercent}%)`\n});\n\n// Output GPS data as JSON object with dbus paths\nmsg.payload = {\n \"Position/Longitude\": Math.round(currentPosition.lon * 1000000) / 1000000,\n \"Position/Latitude\": Math.round(currentPosition.lat * 1000000) / 1000000,\n \"Speed\": Math.round(speedKnots * 100) / 100,\n \"Course\": Math.round(heading < 0 ? heading + 360 : heading),\n \"Altitude\": 0,\n \"NrOfSatellites\": state.satellites,\n \"Fix\": 1\n};\n\nreturn msg;", "outputs": 1, "timeout": 0, "noerr": 0, "initialize": "", "finalize": "", "libs": [], "x": 440, "y": 100, "wires": [ [ "0c0c31077c6760d2" ] ] }, { "id": "0c0c31077c6760d2", "type": "link out", "z": "774e520b07be29b8", "name": "link out 1", "mode": "link", "links": [ "4f40f506eaf4ad25" ], "x": 605, "y": 100, "wires": [] }, { "id": "4f40f506eaf4ad25", "type": "link in", "z": "774e520b07be29b8", "name": "link in 1", "links": [ "0c0c31077c6760d2" ], "x": 115, "y": 180, "wires": [ [ "86cc5cdd90bb8420", "986745bac72057c2" ] ] }, { "id": "86cc5cdd90bb8420", "type": "debug", "z": "774e520b07be29b8", "name": "boat trip", "active": true, "tosidebar": true, "console": false, "tostatus": false, "complete": "payload", "targetType": "msg", "statusVal": "", "statusType": "auto", "x": 300, "y": 240, "wires": [] }, { "id": "986745bac72057c2", "type": "victron-virtual", "z": "774e520b07be29b8", "name": "", "device": "gps", "default_values": false, "battery_capacity": "", "grid_nrofphases": 1, "fluid_type": 0, "include_tank_battery": false, "include_tank_temperature": false, "tank_battery_voltage": 3.3, "tank_capacity": 10, "temperature_type": 2, "include_humidity": false, "include_pressure": false, "include_temp_battery": false, "temp_battery_voltage": 3.3, "x": 470, "y": 180, "wires": [] }, { "id": "6032142db3a46925", "type": "victron-input-gps", "z": "774e520b07be29b8", "service": "com.victronenergy.gps/100", "path": "/Position/Longitude", "serviceObj": { "service": "com.victronenergy.gps/100", "name": "Virtual gps" }, "pathObj": { "path": "/Position/Longitude", "type": "float", "name": "Longitude (LNG)" }, "name": "", "onlyChanges": true, "x": 220, "y": 320, "wires": [ [] ] }, { "id": "190a4ff6a45b57f6", "type": "victron-input-gps", "z": "774e520b07be29b8", "service": "com.victronenergy.gps/100", "path": "/Position/Latitude", "serviceObj": { "service": "com.victronenergy.gps/100", "name": "Virtual gps" }, "pathObj": { "path": "/Position/Latitude", "type": "float", "name": "Latitude (LAT)" }, "name": "", "onlyChanges": true, "x": 210, "y": 380, "wires": [ [] ] }, { "id": "a64099f88109c043", "type": "victron-input-gps", "z": "774e520b07be29b8", "service": "com.victronenergy.gps/100", "path": "/Course", "serviceObj": { "service": "com.victronenergy.gps/100", "name": "Virtual gps" }, "pathObj": { "path": "/Course", "type": "float", "name": "Course (Deg)" }, "name": "", "onlyChanges": true, "x": 210, "y": 440, "wires": [ [] ] } ]