phantom tigger

[Shyam]

Has anyone else experienced a GPIO pin triggering randomly? I've got a few pins connected to my house alarm panel.

In the past 2 weeks one of the pin has triggered by itself and caused an event to fire. This has happened twice. Anyone else experienced this?

[SweetPants]

Do you use pull-up resistors on these wires?

[Shyam]

Do you use pull-up resistors on these wires?

Yep, It's been fine for the past few years. Its just the one pin that's started having this issue.

[SweetPants]

Do you use pull-up resistors on these wires?

Yep, It's been fine for the past few years. Its just the one pin that's started having this issue.

If you remove the connected device, it still happens?
If you have a scope, do you see any spikes on the wire?

[Shyam]

Do you use pull-up resistors on these wires?

Yep, It's been fine for the past few years. Its just the one pin that's started having this issue.

If you remove the connected device, it still happens?
If you have a scope, do you see any spikes on the wire?

Not tried that yet. It's hard to re-create at it happens at random times and its only happened twice so far. Annoyingly this particular pin is the one that triggers when the house alarm goes off, so getting false "alarms" isn't going down well with the missus!