I'm making a car controlled by bluetooth and when I connect it to a USB it works but when I connect it to batteries the bluetooth doesnt work. why?

connect the arduino with batteries and control it with bluetooth

INTP April 2, 2018, 3:14am 6

What pins does the BT use

Topic		Replies	Views
Control BT Arduino-Android dont work with usb conect General Guidance	4	849	May 5, 2021
Carro Arduino uno Bluetooth Hardware	3	678	October 7, 2021
need help on my project rc car controlled via bluetooth Jobs and Paid Consultancy	2	1262	May 6, 2021
Programming Arduino to control DC Motors - School Project Programming	10	5861	May 5, 2021
HELP proj works when arduino connected to pc, when unplug it does not work Jobs and Paid Consultancy	8	1603	May 6, 2021