Do I need to use resistors to connect a Bluetooth Module HC-05 to a Arduino Leonardo or ca I just connect them just like that?
Is the Leonardo a 5V or 3.3V device? Only processors that are powered with 5V need the level shifter on the HC05 RX and HC05 EN pins. 3.3V processors can be directly connected.
There are HC05 modules that require minimum of 3.6V power (3.6V - 6V). A 3.3V device may not power the HC05.
Leonardo is a 5v device and the HC-05 it's a 3.3 level it's just that I forgot how to do the shifter to convert 5v to 3.3v can You help me out on that?
For the pin RX on the Bluetooth Module
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