I'd like to monitor my blood's oxygen content while sleeping. I have an oximeter I put on my finger, but it's not wireless. As long as I'm at it I think it would be easy to monitor temperature and pulse, perhaps blood pressure. I don't have a 'smart'phone but I have a pair of Bluetooth adaptors I've never been able to pair with anything (except in Windozze). I'd like to hear from people who have made such a thing work.

Some smartwatches can monitor pulse. Temp is probably harder, and based on my experience in hospital, having a unit take BP automatically and periodically is fairly disruptive to sleep.
Most anything over-the-counter is probably going to require a smart phone.

This search yielded lots of options. Some of those connect to smart phones, others have their own receiver.

IMO, it's way too much trouble to try to do-it-yourself.

Been here, looked at this, many times. Even quoted on manufacture.

• Heartbeat/pulse monitoring is easy. Watches do it.
• BP is not; as you say, it is invasive and noisy. Get used to it or do without
• External temperature is easy. Internal temperature is more intrusive.
• If you're monitoring for special effects - epileptic siezures, diabetic comas, etc. as a rule the less intrusive, the less efficient.
• There may be room for monitoring audible noises, but that requires intelligent programming and development. This is a DIY possibility.
• There may also be options to watch for deviations. For instance, a blood clot (= heart attack or stroke) causes pulse and blood pressure to shoot up. Monitoring that would yield a warning: If it was a heart attack, it would probably be too late; If it was a stroke, you'd probably get to a hospital in time to be 'thrombolized'.
• There are also certain rhythms and shapes in a cardiograph which are indicative of heart attack in the next 24 hours, and machines were and possibly are made to detect these irregular cardiographs and get the wearer into hospital
  so he can have his heart attack nearer the mortuary :-/.

The audio & pulse deviation thing certainly is experimental. What exactly are you trying to do?

business_kid: Not sure where audio came in, but I have a sleep monitoring app* on my iPhone that uses two different methods.
1. Place the phone on the bed, and it detects movement and uses that to decide about "quality" of sleep
2. Place the phone on the night stand, and it uses sounds to decided about "quality" of sleep.
So the audio thing has, apparently, been done...sorta

*Sleep Cycle -- but this is not an endorsement. I don't even use it much anymore.

I'm getting a Linq loop recorder implanted next week...checking for atrial fibrillation. Kind of a full-time EKG, I'm told. Should be interesting.

There are external thermometers that read internal temperature; they mount on skin.

I put a microphone next to me (I sleep on the floor.) 1 night 10 years ago and recorded the whole time. I heard every breath, every rustle of sheets, cars passing. It was long and boring. Had I been more ambitious I would have written software to analyze it.

I wake up early with a headache, breathing hard. I labor to breathe for the first few hours of the morning. I wonder if my oxygen level has fallen too low during the night. That's the only important variable. I thought I may as well fetch all the data I could while I was at it. The oximeter gives an acceptable reading (>95% SpO2) in the morning. A friend pointed me to a device he could use with his Android phone. I don't see any reason I can't do it with my computer.

You have more serious issues than I. Good luck.

It's particularly amazing how many of (especially newborns, but also elderly) stop breathing altogether during sleep. Doctors have been ready to go in and resuscitate a 'dying baby' when he apparently randomly started breathing again. Yes. I've no great faith in them. They work in a steady state (e.g. air conditioned hospitals).I think Lung Passage dilation is a far more important variable. Have you asthma? It's a hugely difficult task to extract useful information from your average soundcard. You'll need one of those 115200Khz ones. You can try the easy way: Dust mites are the #1 cause of asthma like symptoms in bed. Strip the bed in the morning, air the room all day (They hate that), sleep with freshly washed everything, and a plastic sheet under the sheet. If that cures it - it's dust mite allergy, and I've saved you some complex spectrum analysis

I read some research articles on that a long time ago which concluded that with a large, statistically significant sample size, dangerous arrhythmias (or indicators of impending danger) can be detected in very early stages. That is in contrast to the standard 5-second EKG which seems to detect only after damage is done or on the way.

Hmmm.

My contact with this was in the 1990s probably based on the research you mention. They were isolating ECG distortion, relating to a 2nd or subsequent heart attack.

Suggest you consider a sleep study and evaluation of lung function. You’ll need a Dr. for either, course

'Cuffless Blood Pressure Monitoring '
https://jamanetwork.com/journals/jam...rticle/2752442

I am leery of any of these digital "monitors" that share my personal health information via somebody else's server.

In other words, I wouldn't use one on a bet.

They don't care about you. They just care about your data.

My gp loaned me a thing to wear for 24 hours to monitor BP once. It was battery powered and had a cuff. I've no confidence in Apps; We're pale faced in Ireland because the sun only shines through thick clouds 95% of the time. Lie down to sleep, and your BP goes 'up.' I's better as a measure of iron than BP.

For those symptoms, I'd be looking at respiratory tract constriction. I never drop below 98% (they do these silly tests in hospitals). They consider 94% low here. Tomorrow morning, try holding some undiluted spirits, or a crushed garlic overdose in your mouth and breathe in over them. That should open things out. Are/were you doing something to damage your lung function? Drugs, dangerous work, smoking?