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+--- Thread: How to zero my dashboard gauges ? (/showthread.php?tid=1095)
How to zero my dashboard gauges ? - affinite - 2018-03-31
If my instruments stop sending SignalK data my dashboard continues to display the last msg that it received so I want to zero the gauges after say 15 seconds so that in the event of a sender failure I can have some form of alert. ie a blank value
(Imagine the possible consequences of a fuel gauge stuck showing 1/4 full after a sender failure 6 hrs earlier !!)
The only way Ive been able to do this is by inserting trigger nodes as per my flow below.
I cant help thinking there is a more elegant way of doing this with one node earlier in the stream but I cant make anything else work
Any ideas ?
Thanks
Code:
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msg;","outputs":1,"noerr":0,"x":140,"y":320,"wires":[["b2c4f14b.33f92","7448e190.e1747","f937ef6f.73168","49f0691d.a338d8","15409c62.abccd4","3a6cd545.b9c63a","c9f7d1d3.20881","20f27bf4.a6c6b4","e3121574.25ffb8","b0593cc8.62c48","447083c0.e87a4c","cc89ed11.f9385","93eae067.9113","be1cd659.831c78","c089a379.a1ba2"]]},{"id":"e1d9ffb3.447c9","type":"jsonpath","z":"115f1f92.45423","expression":"$.updates..values[*]","split":false,"name":"Signal K delta values","x":160,"y":160,"wires":[["57b056a5.f9c508"]]},{"id":"b2c4f14b.33f92","type":"function","z":"115f1f92.45423","name":"navigation.speedOverGround","func":"var signalk_key=\"navigation.speedOverGround\";\n\nif(msg.payload.hasOwnProperty(signalk_key)){\n msg.payload=msg.payload[signalk_key];\n return msg;\n}","outputs":1,"noerr":0,"x":560,"y":280,"wires":[["71dbda52.7a4314"]]},{"id":"7448e190.e1747","type":"function","z":"115f1f92.45423","name":"navigation.position.latitude","func":"var 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to zero my dashboard gauges ? - jim321 - 2018-04-03
thanks i added it to my alarm text to watch the gps, the gpio node is on an arduino nano firmata with a gas sensor(MQ2)"propane locker" 5v.
Code:
[{"id":"a43b1311.ae3ac","type":"mqtt out","z":"217cab7.d842f54","name":"gas","topic":"gas","qos":"","retain":"","broker":"e2091c1e.39653","x":1170,"y":1040,"wires":[]},{"id":"c9f79230.06153","type":"ui_text","z":"217cab7.d842f54","group":"a787e42.6da3e18","order":1,"width":0,"height":0,"name":"","label":" ALARM","format":"{{msg.payload}}","layout":"col-center","x":1200,"y":1000,"wires":[]},{"id":"222d7763.b4da98","type":"function","z":"217cab7.d842f54","name":"","func":"var alarm= msg.payload;\nvar gas=\"GAS ALARM\";\nvar ok=\"OK\";\n\nif (alarm===1)msg.payload=ok;\nif (alarm===0)msg.payload=gas;\n\nreturn msg;","outputs":1,"noerr":0,"x":810,"y":1080,"wires":[["a43b1311.ae3ac","c9f79230.06153"]]},{"id":"b5f2d3c4.285ec","type":"function","z":"217cab7.d842f54","name":"float","func":"var signalk_key=\"sensors.float\";\n\nif(msg.payload.hasOwnProperty(signalk_key)){\n msg.payload=msg.payload[signalk_key];\n return msg;\n \n\n}","outputs":1,"noerr":0,"x":630,"y":1000,"wires":[["d35d0580.5778c8"]]},{"id":"d35d0580.5778c8","type":"function","z":"217cab7.d842f54","name":"","func":"var water=msg.payload;\nvar alarm=\"BILDGE ALARM\"\nvar ok=\"OK\"\nvar res=\"RESET\"\n\nif (water===1)msg.payload=alarm;\nif (water===0)msg.payload=ok;\nif (water===\"res\")msg.payload=res;\n\nreturn msg;","outputs":1,"noerr":0,"x":930,"y":1000,"wires":[["c9f79230.06153"]]},{"id":"abd93f25.27af7","type":"function","z":"217cab7.d842f54","name":"pir","func":"var signalk_key=\"sensors.pir\";\n\nif(msg.payload.hasOwnProperty(signalk_key)){\n msg.payload=msg.payload[signalk_key];\n return msg;\n \n\n}","outputs":1,"noerr":0,"x":630,"y":1040,"wires":[["c5039fe0.2e3da"]]},{"id":"c5039fe0.2e3da","type":"function","z":"217cab7.d842f54","name":"","func":"var pir=msg.payload;\nvar piralarm=\"INTRUDER ALARM\";\nvar ok=\"OK\";\nif (pir===1)msg.payload=piralarm;\nif (pir===0)msg.payload=ok;\n\nreturn msg;","outputs":1,"noerr":0,"x":810,"y":1040,"wires":[["c9f79230.06153"]]},{"id":"6b0360f.096f1a","type":"gpio in","z":"217cab7.d842f54","name":"","state":"INPUT","samplingInterval":"300","pin":"2","board":"7fcc44b3.6219bc","x":630,"y":1080,"wires":[["222d7763.b4da98"]]},{"id":"8227003b.4d125","type":"trigger","z":"217cab7.d842f54","op1":"0","op2":"no GPS data","op1type":"num","op2type":"str","duration":"10","extend":true,"units":"s","reset":"","bytopic":"all","name":"gps cog","x":980,"y":940,"wires":[["c9f79230.06153","d35d0580.5778c8"]]},{"id":"c2bd1950.6981b8","type":"ui_button","z":"217cab7.d842f54","name":"","group":"aee4e765.355228","order":1,"width":0,"height":0,"label":"RESET","color":"","bgcolor":"","icon":"","payload":"res","payloadType":"str","topic":"","x":640,"y":960,"wires":[["a9703da2.5563f"]]},{"id":"a9703da2.5563f","type":"trigger","z":"217cab7.d842f54","op1":"res","op2":"0","op1type":"str","op2type":"num","duration":"10","extend":true,"units":"s","reset":"","bytopic":"all","name":"","x":790,"y":960,"wires":[["d35d0580.5778c8"]]},{"id":"e2091c1e.39653","type":"mqtt-broker","z":"","name":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""},{"id":"a787e42.6da3e18","type":"ui_group","z":"","name":"NAV 1","tab":"61ee283e.414488","order":1,"disp":false,"width":"4"},{"id":"7fcc44b3.6219bc","type":"nodebot","z":"","name":"","username":"","password":"","boardType":"firmata","serialportName":"/dev/ttyUSB0","connectionType":"local","mqttServer":"","pubTopic":"","subTopic":"","tcpHost":"","tcpPort":"","sparkId":"","sparkToken":"","beanId":"","impId":"","uuid":"","token":"","sendUuid":""},{"id":"aee4e765.355228","type":"ui_group","z":"","name":"NAV 2","tab":"61ee283e.414488","order":2,"disp":false,"width":"4"},{"id":"61ee283e.414488","type":"ui_tab","z":"","name":"Engine","icon":"dashboard","order":1}]