Learning to understand Node-red Flows

[Derik]

..Like the head says....

Hope there are some pro's that can help to learn domoticz with Node red.
Step by step make simple flows to understand how to use them.

For me myself is nr higher math..
And i use other flows to check some options and try then.

So i hope when i you post here a flow there are some people that can help:-)

My simple flow.
Try to get pressure and wifi from a device

Code: Select all

[{"id":"92af773.5fabe88","type":"tab","label":"Uitlees z2m","disabled":false,"info":""},{"id":"28f69e95.240e02","type":"mqtt in","z":"92af773.5fabe88","name":"","topic":"zigbee2mqtt/ZBXA: Woonkamer","qos":"2","datatype":"json","broker":"76a2f7d0.ff3b38","x":190,"y":180,"wires":[["2cffad2e.910f72","68547aa4.2b5c84"]]},{"id":"2cffad2e.910f72","type":"debug","z":"92af773.5fabe88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":270,"y":120,"wires":[]},{"id":"27e56c48.b0d674","type":"mqtt out","z":"92af773.5fabe88","name":"Domoticz In","topic":"domoticz/in","qos":"0","retain":"false","broker":"6ec8bbd8.1dc814","x":1130,"y":180,"wires":[]},{"id":"50eabbae.8004b4","type":"function","z":"92af773.5fabe88","name":"idx\":13592 druk and pressure","func":"msg.payload = {\"command\":\"udevice\",\"idx\":13592,\"nvalue\":0,\"svalue\":\"pressure\".toString()};\nreturn msg;","outputs":1,"noerr":0,"x":880,"y":180,"wires":[["27e56c48.b0d674","7391975b.b9fa78"]]},{"id":"7391975b.b9fa78","type":"debug","z":"92af773.5fabe88","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":810,"y":120,"wires":[]},{"id":"68547aa4.2b5c84","type":"function","z":"92af773.5fabe88","name":"add pressure","func":"msg.src = 'pressure';\n\nreturn msg;","outputs":1,"noerr":0,"x":490,"y":180,"wires":[["f7c57f5.e8f1f8","50eabbae.8004b4"]]},{"id":"f7c57f5.e8f1f8","type":"debug","z":"92af773.5fabe88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":510,"y":120,"wires":[]},{"id":"2eb3041f.2d2e5c","type":"mqtt in","z":"92af773.5fabe88","name":"","topic":"zigbee2mqtt/ZBXA: Woonkamer","qos":"2","datatype":"json","broker":"76a2f7d0.ff3b38","x":190,"y":420,"wires":[["5a397e50.105c6","7643e676.b13d78"]]},{"id":"5a397e50.105c6","type":"debug","z":"92af773.5fabe88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":230,"y":360,"wires":[]},{"id":"e155d52b.ddd478","type":"mqtt out","z":"92af773.5fabe88","name":"Domoticz In","topic":"domoticz/in","qos":"1","retain":"true","broker":"6ec8bbd8.1dc814","x":1110,"y":420,"wires":[]},{"id":"2c68e92e.dbd696","type":"function","z":"92af773.5fabe88","name":"idx\":13605 custom sensor","func":"msg.payload = {\"command\":\"udevice\",\"idx\":13605,\"nvalue\":0,\"svalue\":\"linkquality\".toString()};\nreturn msg;","outputs":1,"noerr":0,"x":870,"y":420,"wires":[["e155d52b.ddd478","6138e958.aa2ea8"]]},{"id":"6138e958.aa2ea8","type":"debug","z":"92af773.5fabe88","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":870,"y":360,"wires":[]},{"id":"7643e676.b13d78","type":"function","z":"92af773.5fabe88","name":"ad Link","func":"msg.src = 'linkquality';\nreturn msg;","outputs":1,"noerr":0,"x":520,"y":420,"wires":[["4cf428b7.d16448","2c68e92e.dbd696"]]},{"id":"4cf428b7.d16448","type":"debug","z":"92af773.5fabe88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":510,"y":360,"wires":[]},{"id":"76a2f7d0.ff3b38","type":"mqtt-broker","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"verifyservercert":true,"compatmode":true,"keepalive":15,"cleansession":true,"birthQos":"0","willQos":"0"},{"id":"6ec8bbd8.1dc814","type":"mqtt-broker","z":"","name":"","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"verifyservercert":true,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closePayload":"","willTopic":"","willQos":"0","willPayload":""}]

And the output.

ScreenShot303.png

[FireWizard]

Hello @Derik,

This flow is similar as the calculation of the DewPoint in a previous thread.

Look to the picture, you posted in that flow.

Screenshot_dewpoint6.png (66.09 KiB) Viewed 593 times

You see at the left the topic in bold: ZBXA: Woonkamer followed by the payload.
The same msg.payload you see at the right.

And why again a Function node with:

msg.src = 'pressure';

return msg;

Useless and it has no function here.

Test the following flow:

Code: Select all

[{"id":"cb61fe19.f0cc4","type":"mqtt in","z":"d8edc6f8.4eedb8","name":"","topic":"zigbee2mqtt/ZBXA: Woonkamer","qos":"2","datatype":"json","broker":"224916c5.a10cd2","x":190,"y":180,"wires":[["23075d17.5f65c2","ca738ef6.fd37d"]]},{"id":"23075d17.5f65c2","type":"debug","z":"d8edc6f8.4eedb8","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":230,"y":120,"wires":[]},{"id":"83427af8.113f98","type":"mqtt out","z":"d8edc6f8.4eedb8","name":"Domoticz In","topic":"domoticz/in","qos":"0","retain":"false","broker":"ce220aab.627fc8","x":770,"y":180,"wires":[]},{"id":"ca738ef6.fd37d","type":"function","z":"d8edc6f8.4eedb8","name":"idx\":13592 druk and pressure","func":"msg.payload = {\"command\":\"udevice\",\"idx\":13592,\"nvalue\":0,\"svalue\":msg.payload.pressure.toString()};\nreturn msg;","outputs":1,"noerr":0,"x":510,"y":180,"wires":[["83427af8.113f98","c1f963a9.6c3a48"]]},{"id":"c1f963a9.6c3a48","type":"debug","z":"d8edc6f8.4eedb8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":550,"y":120,"wires":[]},{"id":"2e0f29c4.55673e","type":"mqtt in","z":"d8edc6f8.4eedb8","name":"","topic":"zigbee2mqtt/ZBXA: Woonkamer","qos":"2","datatype":"json","broker":"224916c5.a10cd2","x":190,"y":420,"wires":[["5da60a66.8c8ba4","608d39a9.13f5d8"]]},{"id":"5da60a66.8c8ba4","type":"debug","z":"d8edc6f8.4eedb8","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":230,"y":360,"wires":[]},{"id":"9b6e38d.7d0d148","type":"mqtt out","z":"d8edc6f8.4eedb8","name":"Domoticz In","topic":"domoticz/in","qos":"1","retain":"true","broker":"ce220aab.627fc8","x":742,"y":420,"wires":[]},{"id":"608d39a9.13f5d8","type":"function","z":"d8edc6f8.4eedb8","name":"idx\":13605 custom sensor","func":"msg.payload = {\"command\":\"udevice\",\"idx\":13605,\"nvalue\":0,\"svalue\":msg.payload.linkquality.toString()};\nreturn msg;","outputs":1,"noerr":0,"x":502,"y":420,"wires":[["9b6e38d.7d0d148","8f5f5b6b.8194c8"]]},{"id":"8f5f5b6b.8194c8","type":"debug","z":"d8edc6f8.4eedb8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":530,"y":360,"wires":[]},{"id":"224916c5.a10cd2","type":"mqtt-broker","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"verifyservercert":true,"compatmode":true,"keepalive":15,"cleansession":true,"birthQos":"0","willQos":"0"},{"id":"ce220aab.627fc8","type":"mqtt-broker","z":"","name":"","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"verifyservercert":true,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closePayload":"","willTopic":"","willQos":"0","willPayload":""}]

Regards