Hardware description and how to build it
Device hardware can be easily obtained by assembling the three needed modules (ECG module
AD8232, Arduino Nano board and HC-05 or HC-06 Bluetooth module) as shown in figure 1.
Connections can be made by soldering wires directly to the boards or using connector cables
with female headers (figures 2 and 3).
The battery supplies the Arduino board; HC-06 (or HC-05) module is supplied by the Arduino
5 V voltage output while AD8232 module is supplied by the Arduino 3.3 V voltage output.
Figure 1: ECG hardware connections schematics
