Hello,
I need some help to understand how to handle the switch node/and or the syntax of the msg.
My aim is to compare Ta a temperature read from a sensor to a target temperature (Tconsigne).
Tconsigne is set via a flow variable: flow.Tc, so is a its tolerable offset flow.DTc
Depending of the difference between Tconsigne and Ta, I want to start different actions driven by different function nodes.
I spent many hours trying to check the correct syntax to specify the test conditions, but I failed to make it work for all cases. In the following example, if Ta largely below Tc, I cannot trigger the first case (opening the valve).
Here is the corresponding code for these nodes:
[
{
"id": "a6ed9ff7addd787e",
"type": "server-state-changed",
"z": "3ce7ee343e713b47",
"name": "Sensor Rdc ATC",
"server": "4f31a1c534ee3e6c",
"version": 5,
"outputs": 1,
"exposeAsEntityConfig": "",
"entityId": "sensor.atc_e2d7_temperature",
"entityIdType": "exact",
"outputInitially": false,
"stateType": "num",
"ifState": "",
"ifStateType": "str",
"ifStateOperator": "is",
"outputOnlyOnStateChange": false,
"for": "0",
"forType": "num",
"forUnits": "minutes",
"ignorePrevStateNull": false,
"ignorePrevStateUnknown": false,
"ignorePrevStateUnavailable": false,
"ignoreCurrentStateUnknown": true,
"ignoreCurrentStateUnavailable": true,
"outputProperties": [
{
"property": "payload",
"propertyType": "msg",
"value": "",
"valueType": "entityState"
},
{
"property": "data",
"propertyType": "msg",
"value": "",
"valueType": "eventData"
},
{
"property": "topic",
"propertyType": "msg",
"value": "",
"valueType": "triggerId"
}
],
"x": 142,
"y": 661.0000305175781,
"wires": [
[
"e54955cd1e7213ca",
"3f57dfb8b8d9446f",
"3a9f1eb0df8eff81",
"632bf24df66e5acf",
"6f63e40d38fbef80"
]
]
},
{
"id": "e54955cd1e7213ca",
"type": "switch",
"z": "3ce7ee343e713b47",
"name": "Comparaison Ă Tc",
"property": "payload",
"propertyType": "msg",
"rules": [
{
"t": "lt",
"v": "flow.Tc() - flow.DTc()",
"vt": "jsonata"
},
{
"t": "lt",
"v": "Tc",
"vt": "flow"
},
{
"t": "gt",
"v": "flow.Tc() + flow.DTc()",
"vt": "jsonata"
},
{
"t": "gte",
"v": "Tc",
"vt": "flow"
},
{
"t": "else"
}
],
"checkall": "false",
"repair": false,
"outputs": 5,
"x": 390,
"y": 660,
"wires": [
[
"344d448a6c51e098",
"7c3cff876ad370ed"
],
[
"684906a150819e97",
"142992456b3246e0"
],
[
"300ea75091713cf6",
"b4e1aeca822535c2"
],
[
"2265afe0c55736d7",
"300ea75091713cf6"
],
[
"6362cec2f9435841"
]
],
"inputLabels": [
"Temp"
],
"outputLabels": [
"< Tc-DTc",
"< Tc",
"in betwen Tc Tc+ DTc",
">=Tc",
"else"
]
},
{
"id": "7c3cff876ad370ed",
"type": "function",
"z": "3ce7ee343e713b47",
"name": "Signal Open Vanne",
"func": "var msg1={payload:1};\nvar msg2 = { payload: 0 };\nreturn [msg1,msg2];",
"outputs": 2,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 800,
"y": 540,
"wires": [
[
"03c26c2e62201f45",
"1db56187faf4c92b"
],
[
"a4e30eb95197c137",
"4e5453014490d3d5"
]
]
},
{
"id": "142992456b3246e0",
"type": "function",
"z": "3ce7ee343e713b47",
"name": "Signal Standby Vanne",
"func": "var msg1={ payload: 0 };\nvar msg2 = { payload: 0 };\nreturn [ msg1,msg2 ];",
"outputs": 2,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 780,
"y": 660,
"wires": [
[
"6d22e32e921bcb7d",
"1db56187faf4c92b"
],
[
"33b44b957e262585",
"4e5453014490d3d5"
]
]
},
{
"id": "300ea75091713cf6",
"type": "function",
"z": "3ce7ee343e713b47",
"name": "Signal Close Vanne",
"func": "var msg1={payload:0};\nvar msg2 = { payload: 1 };\nreturn [msg1,msg2];",
"outputs": 2,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 780,
"y": 780,
"wires": [
[
"76e30cfb9b85619e",
"1db56187faf4c92b"
],
[
"0fb7b9e94adea266",
"4e5453014490d3d5"
]
]
},
{
"id": "6362cec2f9435841",
"type": "debug",
"z": "3ce7ee343e713b47",
"name": "Cas non traité",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": true,
"complete": "payload",
"targetType": "msg",
"statusVal": "payload",
"statusType": "auto",
"x": 620,
"y": 960,
"wires": []
},
{
"id": "4f31a1c534ee3e6c",
"type": "server",
"name": "Home Assistant",
"version": 5,
"addon": false,
"rejectUnauthorizedCerts": true,
"ha_boolean": "y|yes|true|on|home|open",
"connectionDelay": true,
"cacheJson": true,
"heartbeat": false,
"heartbeatInterval": "30",
"areaSelector": "friendlyName",
"deviceSelector": "friendlyName",
"entitySelector": "friendlyName",
"statusSeparator": ": ",
"statusYear": "hidden",
"statusMonth": "short",
"statusDay": "numeric",
"statusHourCycle": "default",
"statusTimeFormat": "h:m",
"enableGlobalContextStore": false
}
]
The message issued from the HA-node which carries Ta looks like:
{"payload":18.28,"data":{"entity_id":"sensor.atc_temperature","old_state":{"entity_id":"sensor.atc_temperature","state":18.29,"attributes":{"state_class":"measurement","unit_of_measurement":"°C","device_class":"temperature","friendly_name":"ATC E2D7 Temperature"},"last_changed":"2024-01-31T09:15:24.987036+00:00","last_updated":"2024-01-31T09:15:24.987036+00:00","context":{"id":"01HNFCTEXVEJTF4WX177GMC4GA","parent_id":null,"user_id":null},"original_state":"18.29"},"new_state":{"entity_id":"sensor.atc_temperature","state":18.28,"attributes":{"state_class":"measurement","unit_of_measurement":"°C","device_class":"temperature","friendly_name":"ATC Temperature"},"last_changed":"2024-01-31T09:18:01.886325+00:00","last_updated":"2024-01-31T09:18:01.886325+00:00","context":{"id":"01HNFCZ84Y6QXTR546ERM2S76T","parent_id":null,"user_id":null},"original_state":"18.28","timeSinceChangedMs":40}},"topic":"sensor.atc_temperature","_msgid":"a4ddc61bd032b9a6"}
(node-RED v3.0.2)
