I have a standard HC-05 Bluetooth Module for my Arduino Uno.
CIRCUIT: 5V on module to 5v pin or arduino GND on module to gnd pin on arduino TX on module to RX on arduino RX on module to TX on arduino (through voltage divider) KEY AND STATE ARE LEFT UNCONNECTED
I have read many tutorials and most say that I need to use a 10k and 20k Ohm resistor to get 5V signal from the Arudino down to 3.3 V so that the Bluetooth Module doesn't fry up.
I wonder if I could use a smaller value like 1k and 2k or something like that, or would that just short. Any help will be appreciated. Forgive me for the simple question for I am a beginner to the Arduino.