How do I add water and diesel sensor?

[affinite]

OK answered my own question ...
A bit of experimenting and I have my MCP3208 working in SPI/OP and can see the output in the SignalK diagnostic window.
Now to get my head around SignalK/NodeRed to display the result

If you haven't figured it out already this might help a little, its part of a node red flow I use to display engine temperatures. It uses to dashboard nodes to display - https://flows.nodered.org/node/node-red-dashboard
I put a delay node in as well otherwise there was too much data for the graph. 

Hope this might be of use. 

PS Ctrl-i opens the nodes import dialog box.

Code:

[{"id":"12d9eb57.4dee05","type":"websocket in","z":"a1ba0b6c.b93d98","name":"SignalK input","server":"58d1334a.a72ecc","client":"","x":75,"y":98,"wires":[["11b86291.f8905d"]]},{"id":"11b86291.f8905d","type":"json","z":"a1ba0b6c.b93d98","name":"","x":96,"y":208,"wires":[["7517c8ee.de2b48","dbc2f1fc.c6e78","bc5087ef.c78118"]]},{"id":"7517c8ee.de2b48","type":"jsonpath","z":"a1ba0b6c.b93d98","expression":"$.updates..values[?(@.path==\"propulsion.Eng.temperature\")]..value","split":true,"name":"EngTemp","x":264,"y":100,"wires":[["29d547b8.f04588"]]},{"id":"29d547b8.f04588","type":"delay","z":"a1ba0b6c.b93d98","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"minute","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":true,"x":408,"y":52,"wires":[["7e631a32.8bc014"]]},{"id":"7e631a32.8bc014","type":"function","z":"a1ba0b6c.b93d98","name":"Convert to deg C","func":"var numInput = Number(msg.payload);\nmsg.topic = \"Eng\";\nvar T =  numInput-273.15;\nmsg.payload = T.toFixed(0);\nreturn msg;","outputs":1,"noerr":0,"x":592,"y":88,"wires":[["66a37c6d.494d34","d864e825.200108"]]},{"id":"d864e825.200108","type":"ui_chart","z":"a1ba0b6c.b93d98","name":"EngineGraph","group":"67dca234.faad9c","order":0,"width":"23","height":"7","label":"Engine temperature history","chartType":"line","legend":"false","xformat":"%H:%M:%S","interpolate":"linear","nodata":"","ymin":"","ymax":"","removeOlder":"4","removeOlderUnit":"3600","x":829,"y":73,"wires":[[],[]]},{"id":"66a37c6d.494d34","type":"ui_gauge","z":"a1ba0b6c.b93d98","name":"EngTempGauge","group":"8861c889.240108","order":1,"width":"3","height":"3","gtype":"gage","title":"Engine temperature","label":"Deg C","format":"{{value}}","min":0,"max":"120","colors":["#00b500","#e6e600","#ca3838"],"x":911,"y":203,"wires":[]},{"id":"58d1334a.a72ecc","type":"websocket-listener","z":"","path":"ws://localhost:3000/signalk/v1/stream","wholemsg":"false"},{"id":"67dca234.faad9c","type":"ui_group","z":"","name":"Engine/Alt/Exhaust temporature history","tab":"1d99b92f.cedb87","disp":true,"width":"23"},{"id":"8861c889.240108","type":"ui_group","z":"","name":"Temperature gauges","tab":"aeffa403.23f5f8","disp":true,"width":"19"},{"id":"1d99b92f.cedb87","type":"ui_tab","z":"","name":"Graphs","icon":"dashboard","order":2},{"id":"aeffa403.23f5f8","type":"ui_tab","z":"","name":"Gauges","icon":"dashboard","order":1}]

Thanks
Look Sunday is now OP/NodeRed day !!