I want to use an old android device to camera monitor a red LED on a machine and email when the LED turns on.
Must have features:
- Keep the camera on and monitor the camera image for a red led light (I can tape the android device camera to the LED so detecting light/dark conditions may be good enough)
- When light is detected, automatically send an email
What I have already tried:
- There are many "light meter" type apps in the Play Store. I've tried some but none had both features 1 and 2.
- Searches for "red light detection" and similar terms give a lot of distracting hits on apps that use GPS and a database to detect road traffic red lights, which are no good for my use case.