Send an alert if I leave a switch on

[sbender9]

This one lets me know that I forgot to turn off the anchor washdown pump, which I do regularly.

[{"id":"d999af28.39407","type":"signalk-subscribe","z":"db137791.d0f408","name":"Anchor Washdown","mode":"sendChanges","flatten":true,"context":"vessels.self","path":"electrical.switches.anchorWashdown.state","source":"","period":1000,"x":110,"y":580,"wires":[["47ad545e.f5c0fc"]]},{"id":"47ad545e.f5c0fc","type":"switch","z":"db137791.d0f408","name":"is on","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"num"},{"t":"eq","v":"1","vt":"num"}],"checkall":"true","repair":false,"outputs":2,"x":290,"y":580,"wires":[["4d5124c6.a173b4"],["b2134d88.f1aef"]]},{"id":"cfe85a98.3870a8","type":"change","z":"db137791.d0f408","name":"alarm","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"state\":\"alarm\",\"message\":\"The Anchor Washdown was left on\"}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":610,"y":640,"wires":[["da8f972d.8f11c8"]]},{"id":"4d5124c6.a173b4","type":"change","z":"db137791.d0f408","name":"normal","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"state\":\"normal\",\"message\":\"The Anchor Washdown is off\"}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":610,"y":580,"wires":[["da8f972d.8f11c8"]]},{"id":"da8f972d.8f11c8","type":"signalk-send-notification","z":"db137791.d0f408","name":"Washdown Alarm","path":"electrical.washdown.running","state":"warn","message":"","visual":true,"sound":true,"source":"","x":810,"y":600,"wires":[]},{"id":"b2134d88.f1aef","type":"delay","z":"db137791.d0f408","name":"","pauseType":"delay","timeout":"10","timeoutUnits":"minutes","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":110,"y":640,"wires":[["fb9dce3d.376a28"]]},{"id":"355cb6ac.4234a2","type":"switch","z":"db137791.d0f408","name":"is on","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"num"},{"t":"eq","v":"1","vt":"num"}],"checkall":"true","repair":false,"outputs":2,"x":470,"y":640,"wires":[["4d5124c6.a173b4"],["cfe85a98.3870a8"]]},{"id":"fb9dce3d.376a28","type":"function","z":"db137791.d0f408","name":"get washdown state","func":"\nlet app = global.get('app')\n\nreturn {payload: app.getSelfPath('electrical.switches.anchorWashdown.state.value')}","outputs":1,"noerr":0,"initialize":"","finalize":"","x":300,"y":640,"wires":[["355cb6ac.4234a2"]]}]

[mairas]

I was just coming here to figure out how to implement an alarm that'll trigger just once even if the condition is ongoing. My use case is that late in the season, the speed log wheel often gets stuck and I might not immediately notice it because I just have SOG on most of the displays.

I created an alarm that checks if SOG > 1kn and STW == 0 and after 30 s delay raises an alarm. That works but when implemented with signalk-delay, it turned out that the alarm gets continuously triggered. Couldn't really stop the bloody alarm from bleeping during our port maneuvers other than by killing WSK altogether! 🤦

Does the conditional branch and delay you used here fare any better in that regard? How about adding an rbe node in front of the alarm? That should both trigger and clear the alarm just once, right?

[tkurki]

Use delay node to rate limit the output to once an hour or so (with drop intermediate messages option)?

[mairas]

That would work! You'd get a repeated nagging with delay which might be desirable or annoying. In contrast, rbe would trigger the alarm just once after the condition has changed, right?