Don't wind me up about this LOL
Had a customer want some alarm app 'thing' wired into his BMW (which i had i had already spent ages making a whole new custom wring loom on and finsihed) that could tell him when a globe was blown on on his bike or when it was 'stollen' (WITHIN BLUETOOTH RANGE AKA line of sight) on his mobile phone. Total 'gimmick' thing ( i am using nice words here) Managed to convince him its a waste of money. Just walk over to your bike, turn it on and check your lights and if someone is 'stealing' your bike within BT range while you are at the cafe having your coffee just walk over and....