Arduino: 1.8.5 (Windows 10), Board: "Arduino/Genuino Uno"
C:\Users\Home\AppData\Local\Temp\ccIJ8WnI.ltrans1.ltrans.o: In function `begin':
C:\Users\Home\Documents\Arduino\libraries\PulseSensor_Playground-1.5.1\src/PulseSensorPlayground.cpp:56: undefined reference to `PulseSensorPlayground::UsingInterrupts'
C:\Users\Home\Documents\Arduino\libraries\PulseSensor_Playground-1.5.1\src/PulseSensorPlayground.cpp:57: undefined reference to `PulseSensorPlaygroundSetupInterrupt()'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino/Genuino Uno.
Please share your code,so that we can check them for your error.i assume it will be the issue of pulse library installation.
AISHA
Joined September 07, 2017 256Thursday at 12:15 PM
Have you installed the Pulse sensor library properly? Also what code are your trying?