Use variable from script in a flow, I fail miserably

Questions & Help
1

Hello all,

I have been struggling for 6 hours straight now, and I still don’t have it working, so this is my call for help

What I’m trying to build:

I have a homeyscript that connects to a datalogger. The datalogger gives a json reply and I’m filtering a specific sensor for temperature out of the json output.
This homeyscript will be launched every 5 minutes to update the temperature in a variable called “temperature”.
I want to use this variable “temperature” in a flow, where I want to measure if this variable is above or below 70 degrees using a logic card.
If yes action A, if no action B.

I have been successful in writing the homeyscript to grab the temperature from the datalogger. This is the code I made:

try {
  const res = await fetch('https://datalogger/dlx/download/live?');
  if (!res.ok) throw new Error(`HTTP error! Status: ${res.status}`);

  const json = await res.json();
  const rawTemp = json?.headersets?.[0]?.packets?.[0]?.field_values?.[2]?.value;

  if (rawTemp === undefined) throw new Error('Temperature value not found');

  const temperature = Number(rawTemp);
  log(`Temperature Sensor 3 reading: ${temperature} °C`);

  if (!isNaN(temperature) && temperature < 100) {
    global.set('temperature', rawTemp); 
    log(`Temperature Variable set on: ${temperature} °C`);
    return temperature;
      } else {
    return 'Invalid temperature value';
  }
} catch (err) {
  log(`Error: ${err.message}`);
  return `Error: ${err.message}`;
}

The output when I run the script:
Temperature Sensor 3 reading: 73.8 °C
Temperature Variable set on: 73.8 °C
:white_check_mark: Script Success
:right_arrow_curving_left: Returned: 73.8

I created the variable “temperature” as a number in the screen of the flows.

The flow is extremely simple:

image
image940×312 27.1 KB

But as you can see the logic is saying the temperature is not greater than 50 despite the fact that the variable and script is saying 73.8

What am I doing wrong?

Thanks!

2

The second log line shows the value of the same constance temperature, that’s why you see two identical values

I also would refrain from using the same name temperature for different things;
example:

const rawTemp = json?.headersets?.[0]?.packets?.[0]?.field_values?.[2]?.value;
rawTemp = Number(rawTemp);
global.set('Temperature_hs', rawTemp);

To retrieve and view the ‘temperature’ tag in the console, you’d use global.get, as shown in the Homeyscript example scripts

To know what’s going on, and view it’s value: add a timeline card f.i., and add that tag [temperature] to it.

And please format your code as code
(add ``` above and below your script).
Now there’s fancy quotes in it, that never works in scripts