RuntimeError: No access to /dev/mem

Question

I have been trying to use the Python GPIO PWM to control a set of LEDs connected to my RPi. When I run the Python script, I get the following error:

Traceback (m         


        

Answer 1

The problem is with the code above is that I forgot to set RED to at output before trying to use it. The error message did not help resolve this problem. Next time, I need to remember to setup PWM pins as outputs before trying to use them.