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I acquired a HC-06 Bluetooth module, and understand that the voltage on the pins must be 3v3 and therefore requires the use of a voltage divider to lower the Arduino's 5v to 3v3 like this.

wiring diagram with 3V3 pullups

But the page where I purchased the product says the following:

interface level 3.3V, you can directly connect a variety of SCM (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, it can not pass without MAX232 MAX232!

Does this mean I can connect without using a voltage divider?

What does "it can not pass without MAX232 MAX232!" mean?

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Some chips that run on 3.3v have 5v tolerant inputs. But it doesn't look like the BC417 does (looking at the datasheet).

So just add the voltage divider.

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About the MAX232, I have a Dwengo (similar to Arduino) and to use the HC06 I have to disconnect the serial port(=RS232) else I short circuit my HC06.

After some googling, MAX232 is simply the name of that chip which is required to convert your TX/RX from your bluetooth module to something usable by Arduino.

Source: http://en.m.wikipedia.org/wiki/MAX232

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