Hello,

Run the CRON job with EDITOR=nano crontab -e and make sure you are root. I 
forget what it must take to become root in our new systems. By default, the 
Debian Stretch Distro does not place us in the root directory. *sudo -i *will 
do it!

Seth

On Tuesday, September 12, 2017 at 12:35:33 PM UTC-5, Tomas Medina wrote:
>
> I am trying to write a program that reads the analog values of a sonar on 
> the Beaglebone Black Wireless (Debian image 2017-07-01). The program runs 
> fine if executed from the command line, but when I try to run it 
> automatically at startup (using crontab), the program doesn't run at all 
> (as indicated by a grep command). Here is the relevant code:
>
> from time import sleepimport Adafruit_BBIO.ADC as ADC
> ADC.setup()
> while True:
>     sonar = ADC.read(pin)
>     print sonar
>     sleep(.5)
>
> Any help in this matter would be greatly appreciated.
>

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