Will the Bluz work down to the CR2032’s 2.0V cutoff? Is there a boost converter to get this to 3.3V for the system, or is it generally pretty happy between 2.0 and 3.3V?
Is it possible to measure battery life on the bluz itself by typing VIN to an analog pin and doing analogRead, or will the changing system voltage affect the analog reference (is the analog read reference voltage stable? What is it?)
I ask because the batteries I bought were reading 2.8V new and unloaded, so they had clearly self-dischagred some on the shelf. It’d be nice if I could add a Particle.publish notification for a “low battery” event, or even if the battery shield had a low battery indicator on it that could be tied to a Bluz interrupt.