I would like to isolate state and then output an average of all the values.
First look here to see how to extract the value of "state":
https://nodered.org/docs/user-guide/messages
Then install this node, which will average the data (among other possibilities).
1 Like
Or using a change node and JSONata
$sum($$.payload.State)/$count($$.payload)
[{"id":"225951dd.1e6fce","type":"change","z":"bf9e1e33.030598","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"$sum($$.payload.State)/$count($$.payload)","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":380,"y":2660,"wires":[["298f044.73ac97c"]]},{"id":"baf409c9.fa41f","type":"inject","z":"bf9e1e33.030598","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"sensor/hall","payload":"[{\"State\":26,\"Elevation\":79,\"Azimuth\":200,\"SNR\":24},{\"State\":16,\"Elevation\":56,\"Azimuth\":297,\"SNR\":14},{\"State\":27,\"Elevation\":27,\"Azimuth\":263,\"SNR\":33},{\"State\":31,\"Elevation\":31,\"Azimuth\":20,\"SNR\":null}]","payloadType":"json","x":210,"y":2660,"wires":[["225951dd.1e6fce"]]},{"id":"298f044.73ac97c","type":"debug","z":"bf9e1e33.030598","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":630,"y":2620,"wires":[]}]
[edit]
Or using Javascript reduce()
msg.payload = msg.payload.reduce((a,o) => a+o.State, 0)/msg.payload.length
return msg;
Thanks but it still doesn't give me an average. I get NaN from the function node and the change node removes the array and msg.payload
Here is a sample of the message object
{"_msgid":"f616c329e8523667","payload":[{"entity_id":"sensor.flue_temp_2","state":"142.7","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:20:02.246000+00:00","last_updated":"2022-04-05T15:20:02.246000+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.9","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:20:03.672423+00:00","last_updated":"2022-04-05T15:20:03.672423+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.7","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:20:43.669638+00:00","last_updated":"2022-04-05T15:20:43.669638+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.5","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:21:03.676032+00:00","last_updated":"2022-04-05T15:21:03.676032+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.3","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:21:43.666748+00:00","last_updated":"2022-04-05T15:21:43.666748+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.5","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:22:43.666785+00:00","last_updated":"2022-04-05T15:22:43.666785+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.2","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:23:43.664397+00:00","last_updated":"2022-04-05T15:23:43.664397+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.0","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:24:03.666374+00:00","last_updated":"2022-04-05T15:24:03.666374+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.2","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:25:03.660469+00:00","last_updated":"2022-04-05T15:25:03.660469+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.0","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:26:03.673606+00:00","last_updated":"2022-04-05T15:26:03.673606+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.8","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:26:23.661876+00:00","last_updated":"2022-04-05T15:26:23.661876+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.0","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:27:03.658066+00:00","last_updated":"2022-04-05T15:27:03.658066+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.8","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:27:23.658466+00:00","last_updated":"2022-04-05T15:27:23.658466+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.6","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:28:03.654743+00:00","last_updated":"2022-04-05T15:28:03.654743+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.8","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:28:23.655354+00:00","last_updated":"2022-04-05T15:28:23.655354+00:00"},{"entity_id":"sensor.flue_temp_2","state":"142.0","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:29:03.655387+00:00","last_updated":"2022-04-05T15:29:03.655387+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.8","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:29:43.655714+00:00","last_updated":"2022-04-05T15:29:43.655714+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.6","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:30:03.650736+00:00","last_updated":"2022-04-05T15:30:03.650736+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.4","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:30:23.657342+00:00","last_updated":"2022-04-05T15:30:23.657342+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.3","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:31:23.650141+00:00","last_updated":"2022-04-05T15:31:23.650141+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.4","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:31:43.650150+00:00","last_updated":"2022-04-05T15:31:43.650150+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.3","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:32:43.641666+00:00","last_updated":"2022-04-05T15:32:43.641666+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.1","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:33:03.641155+00:00","last_updated":"2022-04-05T15:33:03.641155+00:00"},{"entity_id":"sensor.flue_temp_2","state":"141.3","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:34:23.638284+00:00","last_updated":"2022-04-05T15:34:23.638284+00:00"},{"entity_id":"sensor.flue_temp_2","state":"140.9","attributes":{"state_class":"measurement","unit_of_measurement":"°F","device_class":"temperature","icon":"mdi:thermometer","friendly_name":"Flue Temp"},"last_changed":"2022-04-05T15:34:43.644877+00:00","last_updated":"2022-04-05T15:34:43.644877+00:00"}],"topic":"","startdate":"2022-04-05T15:20:02.246Z","enddate":"2022-04-05T15:35:02.250Z","entity_id":"sensor.flue_temp_2"}
try
[{"id":"94dcf8db.04a2a","type":"inject","z":"bf9e1e33.030598","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"[{\"id\":1,\"month\":\"january\",\"temperature\":65},{\"id\":2,\"month\":\"january\",\"temperature\":28},{\"id\":3,\"month\":\"january\",\"temperature\":38},{\"id\":4,\"month\":\"february\",\"temperature\":59},{\"id\":6,\"month\":\"february\",\"temperature\":38},{\"id\":7,\"month\":\"march\",\"temperature\":80},{\"id\":8,\"month\":\"march\",\"temperature\":40},{\"id\":9,\"month\":\"march\",\"temperature\":20},{\"id\":11,\"month\":\"april\",\"temperature\":19},{\"id\":12,\"month\":\"april\",\"temperature\":49},{\"id\":13,\"month\":\"may\",\"temperature\":56},{\"id\":14,\"month\":\"may\",\"temperature\":86},{\"id\":16,\"month\":\"june\",\"temperature\":55},{\"id\":18,\"month\":\"june\",\"temperature\":40},{\"id\":19,\"month\":\"july\",\"temperature\":40},{\"id\":20,\"month\":\"july\",\"temperature\":90},{\"id\":21,\"month\":\"july\",\"temperature\":20}]","payloadType":"json","x":90,"y":2480,"wires":[["6e21e320.21444c"]]},{"id":"6e21e320.21444c","type":"function","z":"bf9e1e33.030598","name":"","func":"msg = {\"_msgid\":\"f616c329e8523667\",\"payload\":[{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.7\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:20:02.246000+00:00\",\"last_updated\":\"2022-04-05T15:20:02.246000+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.9\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:20:03.672423+00:00\",\"last_updated\":\"2022-04-05T15:20:03.672423+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.7\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:20:43.669638+00:00\",\"last_updated\":\"2022-04-05T15:20:43.669638+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.5\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:21:03.676032+00:00\",\"last_updated\":\"2022-04-05T15:21:03.676032+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.3\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:21:43.666748+00:00\",\"last_updated\":\"2022-04-05T15:21:43.666748+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.5\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:22:43.666785+00:00\",\"last_updated\":\"2022-04-05T15:22:43.666785+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.2\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:23:43.664397+00:00\",\"last_updated\":\"2022-04-05T15:23:43.664397+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.0\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:24:03.666374+00:00\",\"last_updated\":\"2022-04-05T15:24:03.666374+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.2\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:25:03.660469+00:00\",\"last_updated\":\"2022-04-05T15:25:03.660469+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.0\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:26:03.673606+00:00\",\"last_updated\":\"2022-04-05T15:26:03.673606+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.8\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:26:23.661876+00:00\",\"last_updated\":\"2022-04-05T15:26:23.661876+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.0\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:27:03.658066+00:00\",\"last_updated\":\"2022-04-05T15:27:03.658066+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.8\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:27:23.658466+00:00\",\"last_updated\":\"2022-04-05T15:27:23.658466+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.6\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:28:03.654743+00:00\",\"last_updated\":\"2022-04-05T15:28:03.654743+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.8\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:28:23.655354+00:00\",\"last_updated\":\"2022-04-05T15:28:23.655354+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"142.0\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:29:03.655387+00:00\",\"last_updated\":\"2022-04-05T15:29:03.655387+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.8\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:29:43.655714+00:00\",\"last_updated\":\"2022-04-05T15:29:43.655714+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.6\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:30:03.650736+00:00\",\"last_updated\":\"2022-04-05T15:30:03.650736+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.4\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:30:23.657342+00:00\",\"last_updated\":\"2022-04-05T15:30:23.657342+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.3\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:31:23.650141+00:00\",\"last_updated\":\"2022-04-05T15:31:23.650141+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.4\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:31:43.650150+00:00\",\"last_updated\":\"2022-04-05T15:31:43.650150+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.3\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:32:43.641666+00:00\",\"last_updated\":\"2022-04-05T15:32:43.641666+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.1\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:33:03.641155+00:00\",\"last_updated\":\"2022-04-05T15:33:03.641155+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"141.3\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:34:23.638284+00:00\",\"last_updated\":\"2022-04-05T15:34:23.638284+00:00\"},{\"entity_id\":\"sensor.flue_temp_2\",\"state\":\"140.9\",\"attributes\":{\"state_class\":\"measurement\",\"unit_of_measurement\":\"°F\",\"device_class\":\"temperature\",\"icon\":\"mdi:thermometer\",\"friendly_name\":\"Flue Temp\"},\"last_changed\":\"2022-04-05T15:34:43.644877+00:00\",\"last_updated\":\"2022-04-05T15:34:43.644877+00:00\"}],\"topic\":\"\",\"startdate\":\"2022-04-05T15:20:02.246Z\",\"enddate\":\"2022-04-05T15:35:02.250Z\",\"entity_id\":\"sensor.flue_temp_2\"}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":250,"y":2480,"wires":[["e96f33ae.be541"]]},{"id":"e96f33ae.be541","type":"function","z":"bf9e1e33.030598","name":"","func":"msg.payload = msg.payload.reduce((a,o) => a+Number(o.state), 0)/msg.payload.length\nreturn msg;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":480,"y":2540,"wires":[["298f044.73ac97c"]]},{"id":"298f044.73ac97c","type":"debug","z":"bf9e1e33.030598","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":710,"y":2600,"wires":[]}]
msg.payload = msg.payload.reduce((a,o) => a+Number(o.state), 0)/msg.payload.length
return msg;
as the state is a string it needs converting
JSONata
$sum($$.payload.$number(state))/$count($$.payload)
1 Like
That's perfect thank you. With reduce, how do you get to ((a,o) => a+Number(o.state), 0)? I understand number but o.state?
This may explain better than me. Array.prototype.reduce() - JavaScript | MDN
((a,o) - a is the output(accumulator) and o is the value(in this case an object) of each array value. You can give any property name you wish there and reference later in the following function.
=> is the arrow function expression. Arrow function expressions - JavaScript | MDN
a+Number(o.state) - o.state is, o the object, and state the property.
0 - is the initial state of a
2 Likes
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