Sparkfun Pulse Ox extended status code question

Hi Folks,

Thanks for putting together this kit, it has taken a bit of fiddling, but I am getting good data now - yay!

My question is, even if the body status returns a code of 3 (finger detected) and I’m getting reasonable BPM and SPO2 values, the extended status is only returning -128. This does not match any of the values listed in the table in the tutorial - I was thinking a concatenation of -1, -2 and -8, but the table only goes to -6. Can someone point me in the right direction? Thanks!

I would guess that mean the register is empty/full or something; are you using mode2?