phantom tigger

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Shyam
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phantom tigger

Post by Shyam » Friday 27 July 2018 13:05

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?
Raspberry Pi B+
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SweetPants
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Re: phantom tigger

Post by SweetPants » Friday 27 July 2018 13:19

Do you use pull-up resistors on these wires?
Ubuntu 16.04.5 LTS, Intel NUC, MySensors 2.3.0-alpha, Pro Mini 3.3/8M RFM69(HW), ESP8266 (SDK2.2.0), Sonoff, RFLink, RFXcom, MQTT, NodeRed, Domoticz Beta (from source)

Shyam
Posts: 121
Joined: Sunday 11 May 2014 22:11
Target OS: Raspberry Pi
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Re: phantom tigger

Post by Shyam » Friday 27 July 2018 14:29

SweetPants wrote:
Friday 27 July 2018 13:19
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.
Raspberry Pi B+
Rfxcomm rfxtrx433
LigthwaveRF
Byron Door Bell
Accenta Gen4 Security System Integration
HomeEasy PIR
Nest Thermostat
Geofencing
Pushover
Blog: http://www.shyambhundia.com

SweetPants
Posts: 2287
Joined: Friday 12 July 2013 21:24
Target OS: Linux
Domoticz version: V4.10069
Location: The Netherlands
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Re: phantom tigger

Post by SweetPants » Friday 27 July 2018 14:45

Shyam wrote:
Friday 27 July 2018 14:29
SweetPants wrote:
Friday 27 July 2018 13:19
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?
Ubuntu 16.04.5 LTS, Intel NUC, MySensors 2.3.0-alpha, Pro Mini 3.3/8M RFM69(HW), ESP8266 (SDK2.2.0), Sonoff, RFLink, RFXcom, MQTT, NodeRed, Domoticz Beta (from source)

Shyam
Posts: 121
Joined: Sunday 11 May 2014 22:11
Target OS: Raspberry Pi
Domoticz version:
Contact:

Re: phantom tigger

Post by Shyam » Friday 27 July 2018 15:13

SweetPants wrote:
Friday 27 July 2018 14:45
Shyam wrote:
Friday 27 July 2018 14:29
SweetPants wrote:
Friday 27 July 2018 13:19
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!
Raspberry Pi B+
Rfxcomm rfxtrx433
LigthwaveRF
Byron Door Bell
Accenta Gen4 Security System Integration
HomeEasy PIR
Nest Thermostat
Geofencing
Pushover
Blog: http://www.shyambhundia.com

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