1 - I have a sound sensor and When there is sound, lights are on! and no problems here..
2 - Theres a bluetooth sensor and its working without problem by itself. I tested it with my arduino, sent and received data without problems.
This is where the problem occurs!!!
I want to use them together.. Sound sensor and bluetooth together.
When I connect everything, sound sensor starts sending 1 and 0 all the time and lights become on - off and on again. But this starts when i turn on the bluetooth. When i disconnect bluetooth's 5V; sound sensor comes back to normal.