crontab does not work?

[Paeryn]

crontab -e
*/15 * * * * python /home/pi/DHT22-TemperatureLogger/DHT22logger.py
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does not start automatically after reboot pi2b

How long did you wait? */15 will only trigger when the minutes is 0, 15, 30 & 45 so if you booted up at 1 minute past you will have to wait 14 minutes (I don't think it guarantees how many seconds into a minute it will trigger). Also, if that is the last line of your crontab you need to make sure there is a newline at the end, if not cron won't run it.

Redirect stdout and stderr to a file so you can see what errors your code is giving you.

Code: Select all

*/15 * * * * python /home/pi/DHT22-TemperatureLogger/DHT22logger.py > /home/pi/dth22-outout 2>&1

[rpiuser2016]

Code: Select all

*/5 * * * * python /home/pi/DHT22-TemperatureLogger/DHT22logger.py > /home/pi/dth22-outout 2>&1

Works fine, I need more time to wait