Dear all,
I've been playing around with my Raspberry Pi and the photocell sample. I have tried with three different photocells, and three 1uF capacitors, just in case, and I always get 1 as the output by the python script ... so it doesń't seem to be working like it is expected.
Tried other scripts to turn leds on/off without any problems. I also had a I2C Temp Sensor and the GPS working fine ...
I wonder if it is related with the Python + RPi.GPIO library versions that i'm using ? Python is 2.7.3 and RPi.GPIO is 0.5.6 .
Any ideas on how to get this running would be much appreciated. Thanks in advance!
Raspberry Pi - Photocell sample
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- adafruit_support_mike
- Posts: 67446
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Raspberry Pi - Photocell sample
Post a photo of your hardware and connections. We'll see if those give us any clues.
- ecpert
- Posts: 2
- Joined: Fri Sep 05, 2014 1:09 pm
Re: Raspberry Pi - Photocell sample
Hi again, i'm afraid an extra tabulator in the code is the responsible. The "return reading" instruction should be at the same level of indentation as the while clause ... and I had it at the same level as the instruction incrementing the counter, hence the while was only executed once.
I'm a bit embarrassed, to be honest, but had to share the info just in case anyone else had the same problem !
I'm a bit embarrassed, to be honest, but had to share the info just in case anyone else had the same problem !
- adafruit_support_mike
- Posts: 67446
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Raspberry Pi - Photocell sample
Hey, this is an embarrassment-free zone. ;-)
We all do things like that once in a while, and most mistakes are only obvious *after* you know what happened. Knowledge is the flag at the top of a mountain of mistakes most people don't want to admit until they find themselves in the right crowd.
The right crowd is made up of people who've seen and understood these two videos:
https://www.youtube.com/watch?v=xhQ7d3BK3KQ - Jeri Ellsworth: Fail and Fail Often
https://www.youtube.com/watch?v=rDjrOaoHz9s - Extra Credits: Fail Faster
We get that, and we have our own piles of "oh geez" moments holding us up. Around here, "dumb mistake on my part" doesn't mean you made it.. it means you found it and you fixed it. ;-)
We all do things like that once in a while, and most mistakes are only obvious *after* you know what happened. Knowledge is the flag at the top of a mountain of mistakes most people don't want to admit until they find themselves in the right crowd.
The right crowd is made up of people who've seen and understood these two videos:
https://www.youtube.com/watch?v=xhQ7d3BK3KQ - Jeri Ellsworth: Fail and Fail Often
https://www.youtube.com/watch?v=rDjrOaoHz9s - Extra Credits: Fail Faster
We get that, and we have our own piles of "oh geez" moments holding us up. Around here, "dumb mistake on my part" doesn't mean you made it.. it means you found it and you fixed it. ;-)
Please be positive and constructive with your questions and comments.