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by sloughin
Sun Aug 17, 2014 2:15 am
Forum: Troubleshooting
Topic: Broken GPIO? -- How to test?
Replies: 20
Views: 6400

Re: Broken GPIO? -- How to test?

Yes I was just now looking at that -- I had assumed that it would be correctly configured "out-of-the-box" but I see that I can detach the breakout board and then swap which end of the cable is connected to the pi and which to the board. Thanks again.
by sloughin
Sat Aug 16, 2014 9:21 pm
Forum: Automation, sensing and robotics
Topic: Yet more DHT22 sensor code
Replies: 101
Views: 77182

Re: Yet more DHT22 sensor code

You say you connect the sensor to GPIO.8 however, gpio readall doesn't seem to show a GPIO.8. I tried it connected to physical pin 7 (thinking perhaps you start labeling your GPIO pins at 1 instead of 0) and using 3.3V with a 5K pull up resistor, and I got -999 for my readings. Noticing that your gp...
by sloughin
Sat Aug 16, 2014 8:04 pm
Forum: Troubleshooting
Topic: Broken GPIO? -- How to test?
Replies: 20
Views: 6400

Re: Broken GPIO? -- How to test?

Thanks Dr Geoff. You were correct. I had made the assumption that the cable supplied with the breakout connector would naturally face the exit slot on the case, but I was mistaken. A careful look at the circuit board shows that P1 of the GPIO is actually at the end closest to the SIMM card. When I c...
by sloughin
Sat Aug 16, 2014 5:41 pm
Forum: Troubleshooting
Topic: Broken GPIO? -- How to test?
Replies: 20
Views: 6400

Re: Broken GPIO? -- How to test?

I am also having this problem. My RPi2 is working fine otherwise - I can boot up, use the network etc. My supply is the 1A usb phone charger supplied by CanaKit. The 5V - GND pins measure 4.98 VDC. However, the 3V3-GND pins measures only 0.55 - 0.63 VDC. When I hook up the LED ckt shown above, I can...

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