The goal of this firmware is to calculate heartrate from an spo2 sensor and send this to an on-site server.
The microcontroller we use here is an ESP32.
The used SPO2 sensor and chip used for testing where the afe4404 (adc/controller), vemd8080 (fotodiode) and 2 green leds.
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html#introduction
Assuming you use the same sensor and esp32 you will have to connect them as following: Sensor - ESP32 3V3 and ground - to their respective pins on the esp SDA - G14 SCL - G2
idf.py menuconfig in the repo directory you can open the project specific configuration menu of the espressif library.
The most important settings to change are the following:
- under
Example Connection Configurationchange the wifi credentials to match your network. - under
Component Config->afe4404->Patient datachange the ID to the right patient id. exit the menu by pressing escape until you get the save settings dialog.
Once you have followed the before mentioned configuration, connected the afe4404 board and your ESP32. Then you can start to flash to the esp32. You can do this by typing idf.py flash monitor in the project repo. Once the building and flashing is done you should see the correct printouts. after about 25 seconds your heartbeat should be displayed.
Assuming you havent changed the code you should encounter an error saying http request failed. For now the URL is hardcoded but in future versions it will be added to a seperate menu. And it will also be mentioned in Changing settings.
Server repository: https://github.com/bryanvolckaertschool/Projectheartbeat Old repository: https://github.com/SoenensBram/HorlogeESP8622
Website: https://vzwheartbeats.be/