Convert from Celcius to fairenheit

General
1

I have set a Sonoff TH10 with the AM2301 temperature sensor. The flow I have is working well, with one exception. I can not figure out how to convert the celcius that the AM2301 outputs to Fahrenheit. I have a switch node parsing out the temp and humidity. I have the Humidity displaying on a chart and a Gauge.I have the temp also displaying on a chart and a gauge.I have tried a function node with this : var temp=msg.payload. AM2301 .Temperature;
msg.payload = (temp * 9/5 + 32).toFixed(2);
return msg;
I know the formula is correct because it is working in another flow.
Can someone help this newbee?

2

Have you tried using https://flows.nodered.org/node/node-red-contrib-unit-converter.

It is written by a well known gent who hangs out here (and does some great work as well).
Thanks @BartButenaers

2 Likes
3

Can we see a debug of the msg before the function node?

4

If you are using Tasmotta, you can get this directly, you don't need to convert unless you want both measures.

5

It can also be done using jsonata in a change node.
See example at the end of Working with messages : Node-RED

6

Thanks Bobo. I installed the convert units node,using the node manager in Node Red.
Took me about two minutes to look it over and set it up. Working just great,
Thanks again.Tom, AD2TM

7

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