OpenWeather Fahrenheit Calcularion Incorrect?
Posted: 30 Jul 2014 02:21
I selected the OpenWeather module and entered my desired info and selected Fahrenheit as the display type. I noticed that the temperarure was off by a few degrees. I looked into the index.js file itself and found it odd on how the calculation was being performed. The line below is from the original index.js file
Now, OpenWeather.org provides the temperature in measurement of Kelvin, the formula to convert Kelvin to Celsius is straight forward. K - 273.15. And as you see in the above line of code; if Celsius is selected it performs that math correctly. But the Fahrenheit formula being used here is (K * 10) / 10 when the actual formula is (K * 9) / 5 - 459.67 (yes I did google it and there are a couple of ways to convert Kelvin to Fahrenheit but I found this method to implement to be the easiest).
My new line of code is provided below.
I did make PoltoS aware of this. It will be verified, he also wanted me to share it here.
Code: Select all
var temp = Math.round((self.config.units === "celsius" ? res.data.main.temp - 273.15 : res.data.main.temp) * 10) / 10,My new line of code is provided below.
Code: Select all
var temp = Math.round(self.config.units === "celsius" ? res.data.main.temp - 273.15 : res.data.main.temp * 9) / 5 - 459.67,