For the past month, I had touch sensitivity issues, the issue being that the OnlyKey was so oversensitive that even without touching it, simply hovering my finger over the PIN pad was enough to make it register a buttonpress. Initially, I thought it was due to the default settings of the OnlyKey, so I tried changing that setting using the “touchsense” command in the OnlyKey command line utility (See OnlyKey Command-Line Utility | Docs). I tried “touchsense 20”, “touchsense 40” and “touchsense 75”. It was still oversensitive (for anyone reading who’s unaware, the default is 12, and raising the touchsense rating lowers sensitivity, so clearly it wasn’t a touchsense setting issue). At this point I gave up.
A few weeks later, after unplugging my laptop charger, the issue was gone - having my laptop charger plugged into the laptop was causing the oversensitivity issue. I then tested it on my mum’s laptop, with her charger plugged in, and the oversensitivity was not an issue.
At this point I should mention that the charger I use for my laptop is a really old one from a previous laptop of the same model that I used to own (10 years old I think), so I need advice as to the exact nature of this issue, as I believe it could be:
- A known issue that affects all touch-capable USB devices connected to laptop[s] with less-than-perfectly-compatible chargers?
- In this case, it would have nothing to do with you, but might be useful to mention in this forum for anyone else who comes along in the future.
- An issue specific to the OnlyKey, that causes touchsensitivity to be affected by variations in device voltage, or some other electrical setting?
- In this case, it might be something you would want to know.
In any case, I will be making sure I unplug the laptop before putting my PIN in from now on, so it won’t be an issue for me.