Pi 2 and GPIO - Not seeing voltage on pins
Posted: Fri Feb 20, 2015 3:57 pm
So I just got the new Raspberry Pi 2 Model B (I'm still confused on the naming system but it's the new quad-core 1 GB version). Last night I was playing with the Python GPIO library and measuring pins using my multimeter since I don't have any LEDs or anything right now.
In short, no matter what I did I could not read any voltage on the GPIO outputs I activated, though the GPIO function to read an output's current state would think they are set HIGH. I could see 5V and 3.3V on some of the power pins, however there was another pin (forget which one) which was supposed to be a GPIO yet I would always read 3.3V on it regardless of the output state, making me think that the new model pinout does not match the online pinout diagrams! (I was using GPIO.BOARD mode by the way)
Did the pinout change compared to the older models? Am I reading the diagrams wrong? Or could my GPIO be defective?
Sorry I can't provide more details, but I'm at work and don't have my Pi or the script I was writing with me. When I get home I can provide the Python script I'm using which is adapted from a couple online tutorials.
In short, no matter what I did I could not read any voltage on the GPIO outputs I activated, though the GPIO function to read an output's current state would think they are set HIGH. I could see 5V and 3.3V on some of the power pins, however there was another pin (forget which one) which was supposed to be a GPIO yet I would always read 3.3V on it regardless of the output state, making me think that the new model pinout does not match the online pinout diagrams! (I was using GPIO.BOARD mode by the way)
Did the pinout change compared to the older models? Am I reading the diagrams wrong? Or could my GPIO be defective?
Sorry I can't provide more details, but I'm at work and don't have my Pi or the script I was writing with me. When I get home I can provide the Python script I'm using which is adapted from a couple online tutorials.
