WANTED: Implementing a Hall sensor into Ruuvi FW

[otso]

Buttons - Espruino should be ok for getting started, on open drain hall sensors it’s equivalent to 0 V connection.

@AdrianC

@otso if I can gain confidence in the right configuration (guide) to add a hall inside a ruuvitag enclosure I’ll plan to integrate into a commercial application

We’re also aiming to add a Hall sensor to RuuviTag at the same time with the Ruuvi Connector, but this isn’t 100 % certain before the PCB is tested and schedule of new revision is open.