I have an HC05 Bluetooth module on a breakoutboard with pins for STATE/RX/TX/GND/+5V/EN.
Some tutorials say I need to use a voltage divider with two resistors, like this tutorial.
(I only posted 2 tutorials but there are many others.)
I am using it without a voltage divider, and it appears to be working fine. Do I need to use a voltage divider? Why do some say to use it, and others not?
The HC05 baud rate is 9600. It is being used to transmit very little data.