Transparent Mode XBee Projects for Model Railroading

Posted on Feb 6, 2014

The remaining equipment is installed at the train layout`s computer interface. The interface I used here is a Lenz LI100F configured to communicate at 9600bps. Both the LI100F and the XBee Explorer serial are configured as DCE (Data Communications Equipment) devices. These devices are intended to be connected directly to an RS232 serial port on a

Transparent Mode XBee Projects for Model Railroading
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computer, and not to another DCE device. In order to connect the two devices, we were required to reverse the transmit and receive pins through the cable going between them. This is accomplished using a Null modem, which allows two DCE devices (or two DTE (Data Terminal Equipment (e. g. computers) to communicate with each other directly. Additionally, both the LI100F and the XBee Explorer Serial have 9 pin female D-SUB connectors. We need to use a cable with two male ends to connect the two devices. Alternately, a male to male gender changer can be used. The The XBee modules can be configured to communicate through it`s serial port at 1200, 2400, 4800, 9600, 19200, 37400, 57600, and 115200 bps. This should allow matching it`s speed to most serial interfaces.

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