Hello there, I'm looking a way to use the Change Node to replace string variable (Mac address) for another string variable( Name of device). I have a bunch of sensors, around 100 devices, that are being receive in my flow so each one gets a custom trigger. Is there a way of reading a record table, c…

In a function node, you can do a lookup e.g... const lookup = { "ac233facb541": "accelerometer 1", "ac233facb222": "accelerometer 2", "ac233facb333": "accelerometer 3", } msg.payload.deviceName = lookup[msg.payload.deviceId] || "Unknown" return msg

In addition to @Colin question, is the list of ip/names static?

Consist only of that particular string. Photo attached of the payload [Screenshot_20220830-045627_Chrome]

To save the table being created every time through you can use an Inject node to send it to a Global context variable and then fetch that in the function node.

[image] carvi21: How can I do that Do what? Store the lookup in global context? Do a lookup in function? Something else?

How can I store the global context and where do I retrieve that data?

https://nodered.org/docs/user-guide/context

Yes it is possible in a chnage node, using JSONata e.g. [{"id":"a4ecc5df.f941a","type":"inject","z":"30af2d3e.d94ea2","name":"initialise lookup in context storage","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"ac23…

thanks for the advice, was able to configure my flow accordign to my needs. [ { "id": "b004a5d84cee9331", "type": "ui_table", "z": "a53e0c5832346364", "group": "6c31418514176c72", "name": "", "order": 3, "width": 20, "height": 10, …

Change node with multiple conditions, around 100

General

Colin 30 August 2022 06:40 2

Does the string to be changed consist entirely of the IP address or have you got to search for the address in a longer string?

1 Like

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Change node with multiple conditions, around 100

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