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Having power issues sometimes is the "It's always DNS" equivalent in the embedded electronics world.

When we wanted to put one of our customer projects into operation, we noticed strange problems with a Quectel modem that we had not had before. Of course, from a software developer's point of view, the software was initially suspected of causing problems. But slowly a different picture emerged ...

Read the full story and learn how important it is to always consider hardware when you're having software problems (and vice versa!):

https://blog.zero-iee.com/en/posts/quectel-rn520g-stabilitaetsprobleme-raspberry-pi/