I popped the top off one of the oximeters just by running my thumbnail around the moulding, eventually found a couple of snap-together lugs.
Once the top was popped off it revealed the PCB underneath with two likely-looking headers, J1 and J2. Each one has an earth (the square pad by convention).
So - the question is - will one of them turn out to be a comms header? For example, RS232, or USB would be very easy to interface to, SPI or I2C do-able.
I have a 'scope and logic analyser handy but if anyone has done this before please post a comment - thanks. Rather not have to reinvent the wheel...
If I can log O2 and pulse rate it would be useful to feed into a respirator project.
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