Controlling LEDs with voice command seems to be a difficult task, but it’s easy and you can quickly build it. We just need an Arduino UNO to serially communicate with HC-06 Bluetooth module and a smartphone to send voice command to Bluetooth module HC-06. For receiving voice command we are using “Arduino Bluetooth Voice Controller” android app.
Material Required:
- Arduino UNO
- HC-06 Bluetooth Module
- LEDs (Red, and Green)
- Resistor 220 ohm (2 nos.)
- Arduino Bluetooth Voice Controller (Download from play store)
- Breadboard
- Connecting wires
Bluetooth can operate in the following two modes:
- Command Mode
- Operating Mode
In Command Mode we will be able to configure the Bluetooth properties like the name of the Bluetooth signal, its password, the operating baud rate etc. The Operating Mode is the one in which we will be able to send and receive data between the PIC Microcontroller and the Bluetooth module. Hence in this tutorial we will be toying only with the Operating Mode. The Command mode will be left to the default settings. The Device name will be HC-05 (I am using HC-06) and the password will be 0000 or 1234 and most importantly the default baud rate for all Bluetooth modules will be 9600.
The module works on 5V supply and the signal pins operate on 3.3V, hence a 3.3V regulator is present in the module itself. Hence we need not worry about it. Out of the six pins only four will be used in the Operating mode.
HC-06 Bluetooth Module:
| S.No | Pin on HC-05/HC-06 | Pin name on MCU | Pin number in PIC |
| 1 | Vcc | Vdd | 31st pin |
| 2 | Vcc | Gnd | 32nd pin |
| 3 | Tx | RC6/Tx/CK | 25th pin |
| 4 | Rx | RC7/Rx/DT | 26th pin |
| 5 | State | NC | NC |
6
|
EN (Enable)
|
NC
| NC |
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