r-node ring [RedBear Nano2]

Introducing the r-node ring for monitoring Raynaud's phenomenon. Live temperature metrics to your smartphone. Measuring the finger skin temperature, environment temperature, object-in-contact temperature, all in one graph. This way we can judge which/when an object in contact caused a drop on the finger's temperature, what environment temperatures cause us a raynaud's attack, how long they endure and, in general, how frequent/severe/enduring are our symptoms.