arduino underwater

arduino underwater
Originally uploaded by whirlymark

The dissolved oxygen probe worked well and the LCD display turned on when "wanded" turning on the magnetic reed switch

Benthic flux chamber and dissolved oxygen

Mark and the BFC on Wolf Reef Sands
Originally uploaded by whirlymark

It all works. The BFC was deployed on several reefs and the DO probe worked like a charm

SDI-12 protocol

SDI-12 is the acronym for "Serial Data Interface at 1200 Baud". SDI-12 is an asynchronous, ASCII, serial communications protocol that was developed for intelligent sensory instruments that typically monitor environmental data.
The future sensor systems should use this protocol.
There is a great SDI-12 support group

Tracking divers underwater

The expensive way to go to track divers and positions of sampling equipment is to use sonar, like the SCOUT system from Sonardyne.
Or TrackLink from Linkquest also $15k