HC-05 and Bus Pirate - initial configuration (9600 bps)

Want to check if HC-05 module is working fine ?
Bus Pirate may help...


Connections:

Bus Pirate	HC-05
GND (black)	GND
+5V (gray)	VCC
AUX (green)	EN
TX/MOSI (orange)	RXD
RX/MISO (brown)	TXD

( http://dangerousprototypes.com/docs/Hardware_overview ) 



note: AUX (EN) will be used later for tests with AT commands  

For this test, my OS is Ubuntu 16.10.
Devices are 

• Buspirate
  ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
• Asus BT Dongle
  ID 0b05:17cb ASUSTek Computer, Inc. Broadcom BCM20702A0 Bluetooth 

minicom -D /dev/ttyUSB1 starts the session on the bus pirate side

First, power on the HC-05, by enabling power ('w')



Now, you can pair HC-05 to the BT dongle. 

• The RED LED on the HC-05 module should blink quickly while HC-05 is not connected
• When HC-05 is connected, the RED LED should blink every 4 seconds

Example: use the BT device detection from the blueman applet

In my example,  HC-05 is connected as /dev/rfcomm3
Now, configure Bus Pirate in UART mode, with 9600 8n1 configuration:

After this configuration, don't forget to enable power
(power is disabled by Bus Pirate after each mode change)

Set the Bus Pirate in "Live Display" mode ('{')

Open a new minicom with the rfcomm device
Change the device data rate to 9600

Now you can see 

• every character from the "rfcomm" minicom is seen on the Bus Pirate side

• in the same way, every data sent through Bus Pirate is seen on the rfcomm console

 => transmission with default 9600bps configuration is OK