I wanted to use Midi over air and found this interesting page on adafruit: https://learn.adafruit.com/xbee-radios/midi-link.
I bought two XBee S1 (802.15.4) modules. The adafruit adapter with her FTDI cable is the easiest way to reprogram the XBee modules. It can be done on a breadboard but pay attention. The XBee module uses only 3V (not 5V!!) and also RTS/CTS for the communication. So the best way is to use an FTDI cable (Wiring).
First update the XBee firmware. Download the XCTU software from
To be able to send commands to the module we send 3 plus signs (
+++) without Carriage Return (
0x0D) or Linefeed (
0x0A)!! After this we get an
OK from the module and are able to send
AT commands followed by a
CR . The command
ATBD returns the baudrate. 3 is for 9600 bit/s:
To set the module to 31250 bit/s, we have to send the baudrate in hex (31250 = 0x7A12). After the command
ATBD7A12 we test with
ATBD and write the baudrate to the XBee memory with
Now we reconnect with 31250 bit/s an verify if the baudrate is ok. Mark your module with a sticker to remember the baudrate has changed!
The circuits are basically the standard midi circuits, including a DC-DC Converter to get 3V for the XBEE modules.
|2||XBee S1 (802.15.4)|
|2||pin header 2pol|
With a handful of components, no need to draw a layout. The circuits are mounted on breadboards: