Re: With an iPhone?
And how do you know the iphone isn't an integral part of the kit? Especially since it doesn't have to be an iphone - any landfill android could be made to do the job.
Unless the only requirement is blue led for yes, red led for no, having a phone handle the comms and potentially a value add of important details on a good screen, plus ability to mail/phone/sms the data around it seems like the phone is a bit of a no brainer.
Plus not needing either a stoopid battery pack or a tether to a wall wart where mains coverages cannot be guaranteed. Pi's/Arduino's have their place. This aint one of them.
Dumb suggestion from a pi-boi tbh.