Bluetooth triggered box that opens and closes to promixity

[distantarray]

I been wanting to make a box that is triggered by bluetooth that can open a box when coming into proximity, and close when out of proximity.

I been looking through Fivver but not sure where to ask for this type of job anyone got pointers? new to fivver

It doesn't nessasarily have to be bluetooth enabled but as long as a small key card can be used that could fit in a wallet etc it would be fine.