# Tag a value for influxdb
**URL:** https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179
**Category:** General
**Created:** [8 August 2022 15:18 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179 "2022-08-08T15:18:04Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@chris35](https://discourse.nodered.org/u/chris35)
#### Post date: [8 August 2022 15:18 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/1 "2022-08-08T15:18:04Z")
Hi
I have a latitude number and a longitude ;
i want to store them in Influxdb in the same server and measurement
But before I would like to tag them with "Lat" and "Long"
How can i do this ?
Thanks
```auto
msg.payload = Number(msg.payload);
msg.payload = Number(msg.payload.toFixed(7));
return msg;
```
---
### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [8 August 2022 16:38 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/2 "2022-08-08T16:38:49Z")
In InfluxDB, tags are for text metadata, numbers should be in values.
You can have multiple values and tags in a single entry. So just send lat and log value names.
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [8 August 2022 16:54 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/3 "2022-08-08T16:54:33Z")
If you have both values available then something like
`msg.payload = {lat: 23.1, long: 2.5}`
and feed it to the influx node. This is described in the help text for the node, and in greater detail on the nodes home page.
---
### Author:  [@chris35](https://discourse.nodered.org/u/chris35)
#### Post date: [9 August 2022 11:50 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/4 "2022-08-09T11:50:46Z")
Ok
Thanks a lot
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### Author:  [@chris35](https://discourse.nodered.org/u/chris35)
#### Post date: [9 August 2022 14:29 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/5 "2022-08-09T14:29:02Z")
in fact I receive this message in hexa : 6c61743a2034382e31302c206c6f6e673a202d312e3739
I transform it in string : lat: 48.10, long: -1.79
and this is this message that I want to store in Influxdb
but I've an error message to convert it in the good format
```auto
[{"id":"57ceba4f.ff52b4","type":"function","z":"a1fb6147.ca4bd8","name":"to string","func":"msg.payload = Buffer.from(msg.payload, 'hex').toString();\nreturn msg;","outputs":1,"noerr":0,"x":800,"y":400,"wires":[["420fa9f9.c2ff58"]]},{"id":"bb8e3a5e.acfa78","type":"inject","z":"a1fb6147.ca4bd8","name":"","topic":"","payload":"6c61743a2034382e31302c206c6f6e673a202d312e3739","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":630,"y":400,"wires":[["57ceba4f.ff52b4"]]},{"id":"74595e3b.21e598","type":"debug","z":"a1fb6147.ca4bd8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":1150,"y":400,"wires":[]},{"id":"420fa9f9.c2ff58","type":"json","z":"a1fb6147.ca4bd8","name":"","property":"payload","action":"","pretty":true,"x":950,"y":400,"wires":[["74595e3b.21e598"]]}]
```
an idea for help
---
### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [9 August 2022 16:20 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/6 "2022-08-09T16:20:02Z")
what's the error?
---
### Author:  [@chris35](https://discourse.nodered.org/u/chris35)
#### Post date: [10 August 2022 06:25 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/7 "2022-08-10T06:25:22Z")
in fact i would like to get an expression like this :
{"lat": 48.10, "long": -1.79}
to put in influxdb from this message :
6C61743A2034382E313039363033392C206C6F6E673A202D312E37393339333739 --\>lat: 48.10, long: -1.79
and I don't know how to transformwith a node?
Thanks
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 August 2022 08:43 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/8 "2022-08-10T08:43:45Z")
> [@chris35](#):
>
> I transform it in string : lat: 48.10, long: -1.79
If you have a string of that format then, in a function node, you can use `msg.payload.split(",")`
to split it into two parts, then on each of those split it on the ":" and pick up the send part as the value, then build the object using that data.
---
### Author:  [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [10 August 2022 08:59 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/9 "2022-08-10T08:59:14Z")
You could just split the string and build the object
```auto
const parts = Buffer.from(msg.payload, 'hex').toString().split(/:|,/);
msg.payload = {
[parts[0].trim()]: Number(parts[1].trim()),
[parts[2].trim()]: Number(parts[3].trim())
};
return msg;
```
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 August 2022 09:03 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/10 "2022-08-10T09:03:54Z")
Even better 🙂
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### Author:  [@chris35](https://discourse.nodered.org/u/chris35)
#### Post date: [10 August 2022 09:40 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/11 "2022-08-10T09:40:00Z")
awesome it works great 👌
thanks a lot for the help
indeed I did not understand how I could reconstruct the message after having cut it
I understand better now 😀
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [9 October 2022 09:40 UTC](https://discourse.nodered.org/t/tag-a-value-for-influxdb/66179/12 "2022-10-09T09:40:43Z")
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