E.getTemperature() results when below zero

Posted on Tue 10th, January 2017

• #1

Eric

I am logging temperatures using the E.getTemperature() function in a Puck and one night I read back values of 255C which on a very cold night assumed that it was actually -1.

Should we be doing anything to sign the results to allow temperatures below zero?
• #2

Gordon

How exactly did you report the temperature back?

Looking at the code, it seems like it should work (or if it breaks it should return something other than 255) - my guess is that E.getTemperature() might actually be working correctly, and it's something else further down the line that's getting confused.
• #3

Eric
It is the very basic code you published for the Puck.js:
```
NRF.setAdvertising({
    0x1809 : [Math.round(E.getTemperature())]
  },{
    name: "Puck.js 13f1"
  });
```
Perhaps I need to parse the results in node-red but its returning an unsigned int (I think)
• #4

Gordon

Ahh - you're using EspruinoHub? It's entirely likely that EspruinoHub isn't doing be doing the conversion from unsigned to signed.

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