Ferdinand Keil's

electronic notes

Apr 06, 2020

Enabling the Watchdog on a Raspberry Pi

To increase the reliability of embedded systems - especially ones that are hard to physically access - one can use an embedded watchdog. The watchdog, once activated, will reset the system if it is not fed for a certain time-interval. This guarantees a clean reset in case the system ends up in …

Apr 04, 2020

Jun 22, 2017

Fixing cups-lpd on Raspbian Jessie

As I have mentioned before I use a Raspberry Pi running Rasbian Jessie as a print-server. After I made the switch to LPR I started noticing new problems: some documents just wouldn't print. Printing web-pages from Firefox stopped working alltogether. So what now?

What were the symptoms? Whenever I tried …

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