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Questions tagged [watchdog]

a watchdog timer is a simple, low-level electronic timer to detect faults in program execution and recover from malfunction, usually by rebooting the system.

59
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5answers
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How do I hard reset a Raspberry Pi?

How do I hard reset a Raspberry Pi? Obviously you can power cycle, but is there a more subtle way, like a reset pin? It would be very useful to connect a watchdog in case the Raspberry Pi crashes (...
8
votes
3answers
9k views

How to keep watchdog timer running during reboot/shutdown

In my research so far I've noticed there are two approaches to activating a watchdog timer on raspberry: using systemd or installing watchdog. It's all explained well here: https://www.raspberrypi.org/...
13
votes
1answer
5k views

Can I send a heart beat to hardware watch dog from my own program?

Following on from the question and excellent answer provided by Steve Robillard here: How do I hard reset a Raspberry Pi? How can I send a heartbeat signal from my own program to the BCM2708's ...
5
votes
2answers
8k views

mmc0: Timeout waiting for hardware interrupt trigger watchdog

During a strong file I/O application, the Pi regular crashes. mmc0: Timeout waiting for hardware interrupt - cmd25. mmc0: Timeout waiting for hardware interrupt - cmd12. mmc0: Timeout waiting for ...
3
votes
3answers
736 views

Restart Pi if not reachable (3G)

My Pi 2 is uses a USB Modem 3G connection. Sometimes the connection gets stuck and the Pi is no longer reachable via SSH, (Weaved). The Pi itself looks normal, ( the Pi is on and the light on USB ...