Reading txt file when magic mirror is accessible through no-ip

[Fir3R4g3]

Hey there,
I have the following problem.
I hooked up 8 temp sensors to the raspberry pi which are read out via python. The program writes the temps in a text file. And here comes the magic mirror part. I have a module which reads the txt file to display the temps on the mirror. All works well until I make the mirror accessible on the internet via no-ip. The module seems to not find the path of the file anymore. Is there anyway to solve this?

[sdetweil]

@fir3r4g3 what does no-ip mean?

how does the module determine the path to the file?