Kobo and Bluetooth module RN42

RN42 4 is a more reliable Bluetooth module that HC05. Unfortunately, it’s more expensive that HC05 but can be found on the market at about 15-20€ (HC05 is a 5€ module). https://goo.gl/hUXjvV

Connection

Only 4 pins are required on the RN42  ( TX,RX,Vcc and GND)

 

Configuration

Use terraterm : http://ttssh2.osdn.jp/index.html.en for connection unsing the following settings :

    Baud:  115,200 (use 9600 if jumper 4 is set)
    Data Bits: 8
    Parity: None
    Stop Bits: 1
    Flow Control: None

 

Send command :

>$$$
CMD

The RN42 should reply with : "CMD"confirming the device is in command mode

#sets the serialized friendly name of the device
>S-,KOBO
AOK

#sets the security pin code
>SP,0000
AOK 

# set authentication Pin code
>SA,4
AOK

#sets the mode  Pairing Mode.
>SM,6
AOK

Now switch on the Digifly AIR BT and put it into Airtool BT mode. ( see Digifly documentation on section 13.2.2 ). Make sure no other Bluetooth devices are in the area.

#Device Scan Inquiry,
>I
Inquiry,T=7,COD=0
Found 1
00133308ECC1,Digifly Air604,0
Inquiry Done

#Connect,
>C,00133308ECC1    // or direcly >CFI
AOK

Done . Now connect the RN42 to your KOBO