HC06 Bluetooth sensor is a device to communicate with other bluetooth device. This project will show how to send a character from an Android bluetooth app to Arduin serial monitor window.
Step 1: Install latest Arduino IDE (If you have Arduino IDE, please skip this step). Download Arduino IDe from https://www.arduino.cc/en/Main/Software?setlang=en , then install the software.
Step 2: Download sketch code into your computer.
Step 3: Open Arduino IDE -> click file -> click Open -> choose code “hc06.ino”, upload the code into your Arduin (Note: Please don’t connect HC06 bluetooth sensor with UNO board when you upload the code)
Step 4: Choose corresponding board/port for your project,upload the sketch to the board.
Step 5: Connect the HC06 bluetooth sensor to arduin as per following graph:
Step 6: Download Bluetooth Control app and install it into your android cell phone or other android device.
Step 7: Turn on Bluetooth switch of your android device and pair device “HC06” in setting page. Use the default passcode “0000” or “1234”.
Step 8: Open the APP and select the “HC06”. When type a character “a” in android app, you will see character “a” showing on the arduin serial monitor.
If the printing on the back of the HC06 module is correct, this schematic is bad – Uno uses 5v levels, the HC06 uses 3.3. This means that you will need to put a resistor voltage divider or resistor/zener level converter on the HC06’s receive line or the 5v level from the Uno will destroy the HC06.
We’ll re-confirm the graph
It depends on the breakout board you have. The JY-MCU v1.02 version of HC06 pictured is 5V tolerant on TX/RX pins. The ZS-040 version I got with the the 20 in 1 sensor pack is only 5V tolerant on the VCC. Reading up on the ZS-040, 5V on the RX will work only for a short time and will damage components, and eventually burn out the RX.