Patient Vitals Monitor

A bedside monitor built from parts a clinic can actually source. An Arduino reads temperature, heart rate and ECG and puts them on an LCD. An ESP8266 takes the same readings over serial, publishes them to a small web server, and sends an SMS the moment a reading goes out of range, so nobody has to be standing at the bedside to know.

Controller

Arduino + ESP8266

Sensors

Temperature, heart rate, ECG

Local readout

I2C character LCD

Alerting

Twilio SMS on abnormal reading

• Readings shown locally, so the device is useful with no network
• Sensor loop and network loop split across two controllers
• Abnormal-condition check runs before the alert is sent, not after