Default configuration for mircoe ecg2 click

[JakobStr]

Thank you for the effort in creating this repository!
Your examples are working with a mircoe ecg2 click connected to an arduino uno (using the MIKROE-1581 click shield).
The config for this is (if someone else will need it):

byte dataReady_Pin = 2;
byte reset_pin = 17;
byte cs_pin = 10; 

But when I take measurements, I get data like this:

with high noise at 100Hz and 50Hz:

It is possible to filter out the ecg signal digital by using notch filters, but this might lead to artifacts of course.
I also took measurements with the arduino connected to a battery and also in a setup connnected to an raspberry pi, which was connected to a powerbank. So this should not be the coming from the AC voltage (I guess).
Do you have any ideas on how to get rid of this noise?