Okay, another lesson learned: check your connections first. The serial pins weren't locked in there sockets. RX worked but TX didn't. At some unpredictable moments RX didn't work either. This was a very easy fix. Instead of checking the connections I wrote a python program to check the serial port and if it would work with the arduino. Well, it did sometimes, but sometimes it didn't, but always it was only 1 way traffic. I figured it was because of my quick and dirty python and arduino programs. I should have started with the hardware checks.
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