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Monday, May 18, 2015

_HowTo: Failsafe(r) use of GPIO pin for critical applications

In an effort to avoid run-away issues with my HVAC system, located on another continend, I wanted to make sure that a crash of the Raspberry Pi that I used as a controller, did not cause a desaster. Also, I needed to prevent Python crashes from keeping the furnace or the air conditioning system running unchecked.

Here is a link to the post that went through the discovery process and with the help of some smart contributors, eventually led to a failsafe design in hardware and software. This resulting hardware and code has been running for about 18 months to my satisfaction.

The post was published on the forum :


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