one important thing at the end:
as soon as you apply a filter the received msg.payload from websocket comes in an array.
this means:
before the applied filter you could your device with msg.payload.dev
with applied filter you must read the device as msg.payload[0].dev !!!

I have solved the problem. Sorry for the quick post.
Attached please find the command flow for filter

[{"id":"46e364e3.e7c2ec","type":"function","z":"cad50249.94c0e","name":"","func":"msg.payload = {\"cmd\":\"filter\", \"devices\":[\"ai\",\"input\",\"ao\",\"relay\"]}; \nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":280,"y":860,"wires":[["a3e4b046.69f93","c16f715d.8fbe1"]]},{"id":"c16f715d.8fbe1","type":"websocket out","z":"cad50249.94c0e","name":"ws://localhost:8080/ws","server":"","client":"84e45387.411c2","x":540,"y":860,"wires":[]},{"id":"418d6f8c.c0e61","type":"inject","z":"cad50249.94c0e","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":true,"onceDelay":"5","topic":"","payload":"","payloadType":"date","x":110,"y":860,"wires":[["46e364e3.e7c2ec"]]},{"id":"84e45387.411c2","type":"websocket-client","z":"","path":"ws://localhost:8080/ws","tls":"","wholemsg":"false"}]

I want to receive all devices via websocket except one wire sensors. How has the filter command to look like?
All devices but temp or temp and no other device.

I am using node-red with the websocket set command which works ok, but the filter command seems not to work.

Any help appreciated.

thanks for your information.

I have connected a 4 wire cable very close to the three wire sensor and connected the data line to 2 wires in order to use the hub. At the moment it works.

Hallo Unipi Team,
I am new to Modbus and now want to connect Extension xG18 to my unipi 1.1.
What is the evok interface to modbus?
How can I access modbus through evok?
Is there a connection cable coming with the Extension xG18 device?
The Extension xG18 will be about 5 to 6 meter away from my unipi 1.1.
Any info/help appreciated

I have a question regarding the above mentioned sensor, Does it come as a sensor with 4 wire cable (Data in + Data Out) in order to use it with Unipi HUb?

Hello Unipi Team,

I currently have 4 temp sensors from unipi which have 4 cables. Now I have got a one wire sensor (3 m) with only 3 cables (seems to be standard).
How do I connect this sensor with unipi 8 port hub (old model with all ports on one side). As far as I know, on your 4 cable sensors the data line goes to the sensor and then back to the hub on another pin of the RJ plug which the goes to the next port of the hub. This would mean, that I have to bridge somehow this two pins. Result seems to be an unstable bus.

Any idea how to connect 3 cable sensors professionally to your hub/bus?

this flow gets data from unipi 1.1. unipi lite does not have ai ao. Just skip it. temp input is one wire sensor data. the json all node initializes all variables and then websocket delivers actual data.

[{"id":"cad50249.94c0e","type":"tab","label":"unipi1.1 to MQTT","disabled":false,"info":""},{"id":"9d58b57c.1dc5c8","type":"websocket in","z":"cad50249.94c0e","name":"","server":"","client":"84e45387.411c2","x":150,"y":340,"wires":[["f1646973.6f0b08"]]},{"id":"f1646973.6f0b08","type":"json","z":"cad50249.94c0e","name":"","property":"payload","action":"","pretty":false,"x":330,"y":340,"wires":[["317506aa.3aa32a","fa0726fd.a44fb8"]]},{"id":"cdd4d544.02a9f8","type":"mqtt out","z":"cad50249.94c0e","name":"home/ug/Buero/unipi/1","topic":"","qos":"","retain":"","broker":"e78c6663.280d38","x":1180,"y":400,"wires":[]},{"id":"bc4f4c59.0d206","type":"trigger","z":"cad50249.94c0e","op1":"","op2":"1 Stunde keine Meldung von One-Wire Sensoren!","op1type":"nul","op2type":"str","duration":"1","extend":true,"units":"hr","reset":"","bytopic":"all","name":"","x":290,"y":180,"wires":[["1e8f1bff.5ff404"]]},{"id":"7b4c23b3.9cfebc","type":"function","z":"cad50249.94c0e","name":"","func":"msg.payload = msg.topic + \" ---> \" + msg.payload;\nmsg.topic = \"Zeitüberschreitung One-Wire Sensoren\";\nreturn msg;","outputs":1,"noerr":0,"x":670,"y":180,"wires":[["c4704b1c.ce25d8","8e60f8f7.3d3ee8"]]},{"id":"317506aa.3aa32a","type":"switch","z":"cad50249.94c0e","name":"","property":"payload.dev","propertyType":"msg","rules":[{"t":"eq","v":"temp","vt":"str"},{"t":"eq","v":"input","vt":"str"},{"t":"eq","v":"relay","vt":"str"},{"t":"eq","v":"ao","vt":"str"},{"t":"eq","v":"ai","vt":"str"}],"checkall":"true","repair":false,"outputs":5,"x":490,"y":340,"wires":[["bc4f4c59.0d206","c0a56553.2502e8"],["6168748d.9395fc"],["ec9fec9a.b8bb8"],["bf29c465.fd0b98"],["6ec28c7b.7a5854"]]},{"id":"c4704b1c.ce25d8","type":"debug","z":"cad50249.94c0e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":830,"y":220,"wires":[]},{"id":"e7b77d5b.681fb","type":"inject","z":"cad50249.94c0e","name":"","topic":"test","payload":"Testmail unipi-big","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":620,"y":140,"wires":[["8e60f8f7.3d3ee8"]]},{"id":"c0a56553.2502e8","type":"function","z":"cad50249.94c0e","name":"temp","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nmsg.payload = parseFloat(msg.payload.value).toFixed(2);\nreturn msg;","outputs":1,"noerr":0,"x":910,"y":280,"wires":[["cdd4d544.02a9f8"]]},{"id":"6168748d.9395fc","type":"function","z":"cad50249.94c0e","name":"input","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nmsg.payload = msg.payload.value;\nreturn msg;","outputs":1,"noerr":0,"x":910,"y":320,"wires":[["cdd4d544.02a9f8"]]},{"id":"ec9fec9a.b8bb8","type":"function","z":"cad50249.94c0e","name":"relay","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nmsg.payload = msg.payload.value;\nreturn msg;","outputs":1,"noerr":0,"x":910,"y":360,"wires":[["cdd4d544.02a9f8"]]},{"id":"bf29c465.fd0b98","type":"function","z":"cad50249.94c0e","name":"ao","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nmsg.payload = parseFloat(msg.payload.value).toFixed(2);\nreturn msg;","outputs":1,"noerr":0,"x":910,"y":400,"wires":[["cdd4d544.02a9f8"]]},{"id":"6ec28c7b.7a5854","type":"switch","z":"cad50249.94c0e","name":"","property":"payload.circuit","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"str"},{"t":"eq","v":"2","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":650,"y":460,"wires":[["a14e1ae1.a92608"],["dad4982a.d5fe18"]]},{"id":"a14e1ae1.a92608","type":"function","z":"cad50249.94c0e","name":"ai 1","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;        \nmsg.payload = parseFloat(msg.payload.value).toFixed(2);\nreturn msg;","outputs":1,"noerr":0,"x":790,"y":440,"wires":[["7095cd82.073ff4"]]},{"id":"dad4982a.d5fe18","type":"function","z":"cad50249.94c0e","name":"ai 2","func":"var t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;        \nmsg.payload = (10.0 - parseFloat(msg.payload.value)).toFixed(2);\n//msg.payload = msg.payload.toFixed(2);\nreturn msg;","outputs":1,"noerr":0,"x":790,"y":480,"wires":[["6749874e.7eb638"]]},{"id":"8e60f8f7.3d3ee8","type":"e-mail","z":"cad50249.94c0e","server":"smtp.gmail.com","port":"465","secure":true,"tls":false,"name":"juntiedt2@gmail.com","dname":"juntiedt2@gmail.com","x":860,"y":180,"wires":[]},{"id":"1e8f1bff.5ff404","type":"moment","z":"cad50249.94c0e","name":"HH:mm:ss DD-MM-YYYY","topic":"","input":"xyz","inputType":"flow","inTz":"Europe/Berlin","adjAmount":0,"adjType":"days","adjDir":"add","format":"HH:mm:ss DD-MM-YYYY","locale":"de_DE","output":"topic","outputType":"msg","outTz":"Europe/Berlin","x":490,"y":180,"wires":[["7b4c23b3.9cfebc"]]},{"id":"fa0726fd.a44fb8","type":"debug","z":"cad50249.94c0e","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":350,"y":400,"wires":[]},{"id":"5de6d555.65fd4c","type":"inject","z":"cad50249.94c0e","name":"Ubig","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":true,"onceDelay":"1.0","x":110,"y":580,"wires":[["1ec43156.0d3ecf"]]},{"id":"1ec43156.0d3ecf","type":"http request","z":"cad50249.94c0e","name":"http://localhost:8080/json/all","method":"GET","ret":"txt","paytoqs":false,"url":"http://localhost:8080/json/all","tls":"","persist":false,"proxy":"","authType":"","x":320,"y":580,"wires":[["fadb47c7.8068d8"]]},{"id":"b0b395e7.71ed48","type":"catch","z":"cad50249.94c0e","name":"catch no success","scope":["1ec43156.0d3ecf","2dbeaf6.88fdf5"],"uncaught":false,"x":220,"y":640,"wires":[["1bbd0392.3fcfec","63a3399c.45f138"]]},{"id":"63a3399c.45f138","type":"delay","z":"cad50249.94c0e","name":"30 sec","pauseType":"delay","timeout":"30","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":390,"y":640,"wires":[["1ec43156.0d3ecf"]]},{"id":"1bbd0392.3fcfec","type":"debug","z":"cad50249.94c0e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"error","targetType":"msg","x":400,"y":680,"wires":[]},{"id":"2dbeaf6.88fdf5","type":"function","z":"cad50249.94c0e","name":"no success","func":"node.error(\"json/all no success\", msg);   ","outputs":1,"noerr":0,"x":630,"y":640,"wires":[[]]},{"id":"fadb47c7.8068d8","type":"json","z":"cad50249.94c0e","name":"","property":"payload","action":"","pretty":false,"x":510,"y":580,"wires":[["f4c43419.9505e8"]]},{"id":"f4c43419.9505e8","type":"switch","z":"cad50249.94c0e","name":"success","property":"payload.status","propertyType":"msg","rules":[{"t":"eq","v":"success","vt":"str"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":640,"y":580,"wires":[["34618e75.c993a2"],["2dbeaf6.88fdf5"]]},{"id":"34618e75.c993a2","type":"function","z":"cad50249.94c0e","name":"split","func":"var ar = msg.payload.data;\nvar i;\nfor (i = 0; i < ar.length; i++) {\n  node.send({payload:ar[i]});\n}\nreturn;","outputs":1,"noerr":0,"x":790,"y":580,"wires":[["a813b8d1.c4b208"]]},{"id":"a813b8d1.c4b208","type":"function","z":"cad50249.94c0e","name":"format","func":"/*\nvar t_loc = \"home/ug/Buero/unipi/1/\";\nmsg.topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nswitch (msg.payload.dev){\n    case \"temp\":\n        msg.payload = parseFloat(msg.payload.value).toFixed(2);\n        break;\n    case \"input\":\n        msg.payload = msg.payload.value;\n        break;        \n    case \"relay\":\n        msg.payload = msg.payload.value;\n}\nreturn msg;\n*/\n\nvar t_loc = \"home/ug/Buero/unipi/1/\";\nvar mqtt_topic = t_loc + msg.payload.dev + \"/\" + msg.payload.circuit;\nswitch (msg.payload.dev){\n    case \"temp\":\n        return{payload:parseFloat(msg.payload.value).toFixed(2),topic:mqtt_topic};\n    case \"input\":\n        return{payload:msg.payload.value,topic:mqtt_topic};\n    case \"relay\":\n        return{payload:msg.payload.value,topic:mqtt_topic};\n}\nreturn;","outputs":1,"noerr":0,"x":910,"y":580,"wires":[["cdd4d544.02a9f8"]]},{"id":"c52a64.b19355a","type":"comment","z":"cad50249.94c0e","name":"init input, relay, temp","info":"","x":1120,"y":580,"wires":[]},{"id":"6749874e.7eb638","type":"switch","z":"cad50249.94c0e","name":"","property":"payload","propertyType":"msg","rules":[{"t":"neq","v":"","vt":"prev"}],"checkall":"true","repair":false,"outputs":1,"x":910,"y":480,"wires":[["cdd4d544.02a9f8"]]},{"id":"7095cd82.073ff4","type":"switch","z":"cad50249.94c0e","name":"","property":"payload","propertyType":"msg","rules":[{"t":"neq","v":"","vt":"prev"}],"checkall":"true","repair":false,"outputs":1,"x":910,"y":440,"wires":[["cdd4d544.02a9f8"]]},{"id":"84e45387.411c2","type":"websocket-client","z":"","path":"ws://localhost:8080/ws","tls":"","wholemsg":"false"},{"id":"e78c6663.280d38","type":"mqtt-broker","z":"","broker":"10.0.0.43","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","willTopic":"","willQos":"0","willPayload":""}]

Hi Martin,

thanks for your help and support.
All running again!

regards Hannes

requested file /etc/nginx/sites-enabled/evok file:

installation legacy with script as on git hub

installation 2 weeks ago

upstream evok {
        server localhost:;
}

server {
	listen  default_server;
	server_name  _;

	#ssl on;
	#ssl_certificate      /etc/nginx/democert.pem;
	#ssl_certificate_key  /etc/nginx/democert.key;

	#access_log  /var/log/evok.access.log;
	access_log  off;
	root /var/www/evok;

	location / {
	    index index.html;	    
	}
	
	location /favicon.ico {
		alias /var/www/evok/favicon.ico;
	}

	location /ws {
		proxy_pass http://evok;
		proxy_set_header Host $host:$server_port;
		proxy_http_version 1.1;
		proxy_set_header Upgrade $http_upgrade;
		proxy_set_header Connection "upgrade";
		proxy_buffering off;
		proxy_cache off;
		proxy_read_timeout 180;
	}

	location /rest {
		proxy_pass http://evok;
		proxy_set_header Host      $host:$server_port;
	}
	
	location /json {
		proxy_pass http://evok;
		proxy_set_header Host      $host:$server_port;
	}
	location /bulk {
		proxy_pass http://evok;
		proxy_set_header Host	$host:$server_port;
	}
	location /rpc {
		proxy_pass http://evok;
		proxy_set_header Host	$host:$server_port;
	}
	
}