![]() ![]() Simply connecting the RS232 UART lines of the bluetooth module to the TX/RX lines of the Arduino does the trick: Arduino-RX to Bluetooth-TX and visa-versa allows them to communicate (This may not be true when communicating from the Arduino’s MCU and not FTDI-USB – check the connections!). ![]() The Arduino device was programmed to just flash an LED (digital #13) so it left the serial communications lines. With my Arduino shield it is possible to connect the bluetooth module directly to the FTDI chip. The PCB layout is available for you to do as you please, in line with my standard Disclaimer & Copyright. Arduino Shield – Connecting It UpĪs mentioned previously, I made an Arduino Shield for the WLS123A1M Bluetooth RS232 Module. There is also some interesting discussion on the forums of SeeedStudio, here: Set up connections between two BluetoothBee step by step. The Serial Port Bluetooth Module (Master/Slave) Wiki Page has some basic information, but the key to success for me was in the Bluetooth Module Manual v1.2.pdf document. The part was purchased from SeeedStudio, and can be found here: Serial Port Bluetooth Module (Master/Slave). I also developed an Arduino Shield for the device, which can be found further down this page. It was a little hard to get the device going, and the instructions a little hard to follow so I decided to document my results with the module here. The WLS123A1M RS232 Bluetooth module was bought for me as a present by Aaron Brown from Seeed Studio. Anything you could spare would make a difference. This site is run entirely out of my own pocket, with no advertising because that’s how I feel it should be. If you find this page useful, please consider donating a small sum of money (of your choosing) to help fund my time and the upkeep of this server.Don’t take this page as gospel. If you think anything is wrong, then contact me: Feel free to send feedback, suggestions, corrections. I could have misunderstood something, or I could have completely got something wrong. Much of this page is my interpretation of the datasheet.Before you get too stuck into this page, please bear a few things in mind: ![]()
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