The Industrial Raspberry Pi Forum

Dear all,
I am experimenting with the hardware watchdog on the revpi connect.

In the script "enable_relay_watchdog.py" the variable "ret" is called in line 13 before it is being initialized. That should cause an error. Is this intended?

Do I have to switch the RevPiLED Bit 7 (according to the example on the RevPi) to reset the watchdog or could I also use a different mechanism, e.g., send a pulse from a digital output somewhere? Are there hardware solutions to reset the watchdog timer or does it have to be from software?

Best, Robert

Hi Robert,
this is true we have to modify the script "enable_relay_watchdog.py" here. Thank you for your feedback.
The "RevPiLED" is the right variable and you have to switch the bit 7.
We have to modify our documentation here: Watchdog
The watchdog is implemented in hardware to be independent from your application. But you may use the mechanism via RevPiLED bit 7 to reset it via software.
By the way the implementation is here https://github.com/RevolutionPi/piContr ... ter.c#L805 .
But have a look at "Monitor connected devices" that guide you how to connect the digital input and use it for the watchdog.

Dear Dirk,
thank you for your informations. I am looking into these now.
Where can I find "monitor connected devices"? Using the Kunbus search I did not found a specific topic named that way.
Best, Robert

HI have a look here for "Monitor Connected Devices"
https://revolution.kunbus.com/tutorials ... rect=en_US