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Aydin S
May 22, 2015, 11:36:59 AM5/22/15
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I'm trying to set a pin to high (for instance) in a periodic way using web2py in an embedded linux.
I set the GPIO to output for example :
GPIO.setup(pin 20, output)
and then
if x>y
GPIO.setup(pin 20, high)
and run the scheduler every 10 second
The problem with this is that every 10 second when it gets to the line which sets the pin to be output, it turns it low (that's the default).
I am frustrated with scheduler to get it to run two functions so that I can put the pin initialization in one which runs only at startup. I tried to use the crontab -e and initialize there, but it looks like web2py models does not have access to those and failed to run.
I've been thinking to make a creative way to bypass GPIO setup after first run of scheduler and I was successful but scheduler fails in the second repeat because does not know the setup apparently.
Web2py experts please help me find out the solution....Thanks
I set the GPIO to output for example :
GPIO.setup(pin 20, output)
and then
if x>y
GPIO.setup(pin 20, high)
and run the scheduler every 10 second
The problem with this is that every 10 second when it gets to the line which sets the pin to be output, it turns it low (that's the default).
I am frustrated with scheduler to get it to run two functions so that I can put the pin initialization in one which runs only at startup. I tried to use the crontab -e and initialize there, but it looks like web2py models does not have access to those and failed to run.
I've been thinking to make a creative way to bypass GPIO setup after first run of scheduler and I was successful but scheduler fails in the second repeat because does not know the setup apparently.
Web2py experts please help me find out the solution....Thanks
Niphlod
May 22, 2015, 2:55:49 PM5/22/15
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every scheduler task is executed within an isolated process. I don't know the internals of GPIO but I guess you'd need either:
- istantiate gpio, retrieve the value, act upon it (e.g. setting a new value)
- set two tasks: one (the 1st) that either is repetitive but stores somewhere if it ran correctly or that doesn't repeat itself, and the other one to repeat (2nd to nth)
António Ramos
May 23, 2015, 9:02:34 AM5/23/15
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Why do people use raspbery pi ?
I use electric imp or even esp8266 and have my sensors connected to the cloud where the app lives.
No more problems with setting up linux, drivers, etc
Its IOT time!!
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Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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Dave S
May 26, 2015, 1:46:25 PM5/26/15
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On Saturday, May 23, 2015 at 6:02:34 AM UTC-7, Ramos wrote:
Why do people use raspbery pi ?I use electric imp or even esp8266 and have my sensors connected to the cloud where the app lives.No more problems with setting up linux, drivers, etcIts IOT time!!
a) First I've heard of electric imp or esp8266
b) Raspberry Pi isn't just a sensor platform (that wasn't even what it was developed for).
/dps
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