AT-09 BLE Bluetooth 4.0 Module TI CC2541 ( HM-10 )

The AT-09 is a module that contains a BLE chip (a CC2540/CC2541). This module allows to perform serial communication with the BLE chip thanks to an Rx and a Tx pin. This module is also very similar to the HM-10 module and is also compatible with it. So if you have some experience with the latter, you will get started quickly with the AT-09.

Here’s a detailed tutorial from Yassine benabbas

The easiest way to configure the AT-09 module is using an USB to Serial converter and the Arduino Serial Monitor to insert AT commands.

Connect the module to an USB to Serial converter:

AT-09   -    USB-Serial

VCC       -     VCC (5V)

GND      -     GND (0V)

TX         -      RX

RX         -      TX

EN         -     VCC

1 - Connect the USB-Serial converter to the computer.

2 - Open Arduino IDE and configure de COM port for the USB-Serial converter.

3 - Open the Arduino Serial Monitor and configure the BaudRate to “9600 baud” and “Both NL & CR”.

Now lets type AT Commands (messages) to the AT-09 module:

4 - Type AT and press ENTER. The module will respond with OK stating that is ready to receive commands.

5 - Change the name of your module to botnroll:

AT+NAMEbotnroll

The module must answer with:

+NAME=botnroll

OK

Note: If the module don´t send the confirmation message, send the command again!

6 - Set the pin for your module:

AT+TYPE1 to enable the pin function ( AT+TYPE0 to disable)

The module must answer with:

+TYPE=1

OK

AT+PIN123456 to set the pin to 123456

+PIN=123456 OK

Note: If the module don´t send the confirmation message, send the command again!

7 - Set the module as SLAVE

AT+ROLE0 Note: for master mode type: AT+ROLE1

+ROLE=0

8 - Set the module to connect manually (safer):

AT+IMME1 Note: for automatic connection type: AT+IMME0

OK+Set:1

Note: If the module don´t send the confirmation message, send the command again!

9 - To reset the module:

AT+RESET

The module is now configured and can be detected in the Bluetooth devices of your smartphone.

In order do use an Android or iPhone device to communicate with the module you must download an BLE APP.

For Android search for Serial Bluetooth Terminal app so you can connect to the AT-09 module and send messages to the Arduino Terminal and vice-versa. For iPhone try the bluino app.