# Zwave JS loop help
**URL:** https://discourse.nodered.org/t/zwave-js-loop-help/101794
**Category:** General
**Created:** [16 September 2026 17:06 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794 "2026-09-16T17:06:36Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@fogmajor](https://discourse.nodered.org/u/fogmajor)
#### Post date: [16 September 2026 17:06 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/1 "2026-09-16T17:06:36Z")
I currently have 3 zwave devices that I switch on with delay between them of a few seconds
The function node is as follows
```auto
if (msg.payload.directive == "TurnOn") { // === means equals, both value and datatype ie 1 but not "1"
var onoff = true
}
else if (msg.payload.directive == "TurnOff") {
var onoff = false
}
//var on = msg.payload /\*trigger\*/
const \_nodeId = 23; /\* Target Node \*/
const \_value = onoff; /\* Value \*/
const \_valueId = {
"commandClassname": "Binary Switch",
"commandClass": 37, /\* Binary Class \*/
"endpoint": 0, /\* Target End point - The device might have 2 binary switches \*/
"property": "targetValue", /\* Property \*/
}
const Message = {
payload: {
cmd: {
api: 'VALUE',
method: 'setValue'
},
cmdProperties: {
nodeId: \_nodeId,
valueId: \_valueId,
value: \_value
}
}
}
return Message;
```
I the move to the second function one changing the Node ID and then the third.
Is there a way of just having one function and having the node id changing
Many thanks
Andrew
---
### Author:  [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [16 September 2026 17:12 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/2 "2026-09-16T17:12:35Z")
You should be able to send an array of ID's e.g `[23,24,25]`As @marcus-j-davies has allowed mutli casting in his nodes.
Or if you wamt a delay set up a loop ( for, forech, etc) and use node.send() rather than return, and delay each output of the function node with a delay set to rate limit. [Writing Functions : Node-RED](https://nodered.org/docs/user-guide/writing-functions#sending-messages-asynchronously)
Or use a split node and split the array of id,s and use the split payload in the same function node, you can rate limit each split message.
---
### Author:  [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)
#### Post date: [16 September 2026 19:08 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/3 "2026-09-16T19:08:32Z")
As mentioned above...
send 1 message, but set `nodeId` to an array of Device ID's
- Providing all devices in the array support the same class / security (I think - but there might be magic in the driver to address that anyway)
You shouldn't need to loop / spread.
If multicasting isn't an option - refer to `node.send()`
---
### Author:  [@fogmajor](https://discourse.nodered.org/u/fogmajor)
#### Post date: [17 September 2026 09:26 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/4 "2026-09-17T09:26:56Z")
Hi and thank you so much for your prompt reply.
Would you be able to expand on your responses with a brief outline of the requirements, i am fairly new to nodered.
Thank you in advance
Andrew
---
### Author:  [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)
#### Post date: [17 September 2026 19:29 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/5 "2026-09-17T19:29:24Z")
Hi @fogmajor
I have butchered your image.
And the `function` node that is left, use the following
```auto
/* Short hand for 'If its TurnOn = true else false' */
let Value = (msg.payload.directive === "TurnOn" ? true : false)
const Nodes = [3, 5, 7] /* Your Target Nodes */
const ValueID = {
"commandClass": 37, /* Binary Class */
"endpoint": 0, /* Target End point - */
"property": "targetValue" /* Property */
}
const Message = {
payload: {
cmd: {
api: 'VALUE',
method: 'setValue'
},
cmdProperties: {
nodeId: Nodes,
valueId: ValueID,
value: Value
}
}
}
return Message
```
Sending an array (collection of Node ID's) : [1,2,3,4,5]
The Device Node will attempt to send a single message to all target nodes, instead of 3 messages to the network.
This is not a Node RED thing its a Marcus is great thing 😉
- It uses multicast to achieve it.
- The stipulation is, the Target nodes, must support the same class (and I think Security class), so its trial and error - although I think the underlining driver does a lot here to address that)
Also..
Where you see `commandClassName`, `propertyName` its just metadata, not a required property
An array in javascript, is just that... an array of "things"
`[Something, Something, Something, Something]`
In the Device Node, it supports an array of Node IDs
---
### Author:  [@fogmajor](https://discourse.nodered.org/u/fogmajor)
#### Post date: [17 September 2026 22:24 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/6 "2026-09-17T22:24:48Z")
Hi Marcus
May I take this opportunity to thank you for the basic and informative way you explained the solution. It works a treat there was no trial and error but it also taught me about arrays. Thank you for your input of Zwavejs.
As late father used to say "Every day is a school day"
Best wishes
Andrew
---
### Author:  [@fogmajor](https://discourse.nodered.org/u/fogmajor)
#### Post date: [17 September 2026 22:26 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/7 "2026-09-17T22:26:18Z")
Hi there
Many thanks for taking the time trouble to answer my questions.
Best wishes
Andrew
---
### Author:  [@bakman2](https://discourse.nodered.org/u/bakman2)
#### Post date: [18 September 2026 09:20 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/8 "2026-09-18T09:20:32Z")
Just a nice to know, if you use the property name as the object name, in javascript it will create the property names for you, eg:
```auto
const api = "VALUE"
const method = "setValue"
let value = (msg.payload.directive === "TurnOn" ? true : false)
const nodeId = [3, 5, 7]
const valueId = {
"commandClass": 37,
"endpoint": 0,
"property": "targetValue"
}
const message = {
payload: {
cmd: { api, method },
cmdProperties: { nodeId, valueId, value }
}
}
return message
```
I am allergic to pascal case in javascript :')
---
### Author:  [@fogmajor](https://discourse.nodered.org/u/fogmajor)
#### Post date: [18 September 2026 10:23 UTC](https://discourse.nodered.org/t/zwave-js-loop-help/101794/9 "2026-09-18T10:23:28Z")
Thank you very much, its good to know.
Best Wishes
Andrew