Heart rate monitor for MQTT server by ESP32

AD8323 ECG(Electronic CardiodiaGram) board is a worth buying device to observe the electric activity of heart. Not only viewing ECG by monitor plot in Arduino IDE , heart beat rate can be transfered remotely by ESP32 to MQTT server like ThingsBoard running on Raspberry pi and charted by ThingsBoard.

• Heart beat rate is sent to MQTT server every 15sec by default.
• I recomment to use ThingsBoard as a MQTT server and run with AIR BENTO to visualize heart beat rate vs co2 level or temperature or air pressure.

based on pcbreflux's art ESP32_AD8232.ino

what's new

• May 12, 2018

Heart sensor AD8323

• analog output is connected to GPIO 34
• Lead off + : GPIO 16
• Lead off - : GPIO 17

References

• SparkFun Single Lead Heart Rate Monitor - AD8232
  https://www.sparkfun.com/products/12650

• "ESP32 #50: Heart Rate / ECG Monitor with AD8232" by pcbreflux
  https://www.youtube.com/watch?v=bPefUf0waoA

• "DIY ECG"
  https://www.youtube.com/watch?v=0JPNoVXht3c

• "ELI5:How do right leg drivers work?"
  https://www.reddit.com/r/explainlikeimfive/comments/4oo7nl/eli5how_do_right_leg_drivers_work/

• ThingsBoard
  https://thingsboard.io/