Hi, I am new in this forum, so hello everybody.
I hope someone can help me.
I am working on little project with an arduino nano at 5V. I want to log the various sensors values wirelessly, via a bluetooth slave serial module, connected to RX0 & TX0 pin of the Nano.
The bluetooth module needs 3.3V for the TX and RX signal. And the arduino Nano is the 5V version.
Can I connect the Nano TX0 and RX0 directly to the RX & TX of the bluetooth module?
Or do I have to use some resistor to level down the signal?
If someone can tell me, what resistor value I must use.
thank you all and sorry for my english :)