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Ever wake up in the morning found your CPAP mask is off? This device will alarm you if you have unintentionally removed mask during sleep.

CPAP (Continuous Positive Airway Pressure) therapy is the most common form of treatment for Obstructive Sleep Apnea (OSA). For the CPAP therapy patients, it is important to wear the CPAP mask all the time while sleep in order for the therapy to effective, and also to meet the CPAP compliance criteria required by the insurance companies.

However many people have issues while adjusting to sleeping with a CPAP mask, including the problem of waking up consistently to find their CPAP mask off. Although many modern CPAP devices are sophisticated enough to differentiate the mask actually being on the person or if the person just turns it on but doesn’t wear the mask, not all of them have alarm or alarm loud enough to wake up the patient when the CPAP mask is removed, or there is a large air leak.

This project is about making digital manometer to monitor the air pressure inside the CPAP piping. It will display the real time air pressure inside the CPAP piping, and device will give out an audible alarm when the CPAP mask in likely off or there presents large air leak during the therapy.

MPXV7002DP breakout board
Arduino Nano V3.0 with I/O expansion board
Serial LCD 1602 16x2 module with IIC/I2C adapter blue or green
12x12x7.3mm Momentary Tactile Push Button Switch with a keycap
DC 5V Active Sound Buzzer
2mm ID, 4mm OD, Flexible Silicone Rubber Tubing
3D printed sensor body and the case
Dupont jumper wires and self-tapping screws (M3x16mm, M1.4x6mm, 6 each)”

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