On my Raspberry Pi, I tried to do some experiments with GPIO, without success.
Measuring the voltage between GND and GPIO11, for example, always helds a result of 0. I am using /sys/class/gpio commands to turn GPIO on and off. Between GND and 3.3V, it returns 2.2V. Te only one that seems to work is between GND and 5v.
- Turned on the raspberry py
- Plugged in a flat cable between raspberry and a breadboard
- Measured P1-25 (GND) and P1-01 (3v3). Got 2.2 V
- Followed there instructions (https://sites.google.com/site/semilleroadt/raspberry-pi-tutorials/gpio). GPIO pin 11 didn't change voltage
Am I doing something wrong?