ZN-241G Technical Reference
2000- 2006 Cirronet
Inc
2
M-2400-0006 Rev A
1. Getting Started
The ZN-241G is designed to connect to another 802.15.4 radio. In almost all cases, if
you turn two ZN-241Gs on in range of each other, they will link to each other. The
simplest method for using two ZN-241Gs is to attach the antennas, power them both
up and then check the link lights (center red LED) on both radios. If they are both lit,
and the default baud rate of 38,400 is acceptable, no further configuration is needed.
The radios can be used as is.
1.1 Changing the Baud Rate
The ZNWizard software simplifies the configuration of several radio parameters, the
most basic being setting a baud rate other than the default. To change the baud rate,
connect the ZN-241G to a PC by plugging in the serial cable to the 9 pin connector on
the radio then connecting the other end to the serial port on the PC. Plug the
transformer end of the power supply into a wall outlet and the other end into the ZN-
241G and launch the ZNWizard software; the following screen will appear.
Select a different baud rate using the drop down menu labeled Baudrate then Click
OK; the following screen will display. Close down ZN Wizard and connect the other
ZN-241G up in the manner described above and repeat the procedure for the second
radio, then click OK. The radios are now ready for use.
1.2 Other Select Comm Port Settings
In addition to changing the baud rate, you may also change the Comm Port, Parity,
Stop Bits and whether or not Auto Detect is needed. Default values for these
parameters are displayed in the window above. Available Comm Ports will be marked
with an “OK”; others will be marked with ‘N/A”. The Auto Detect function works
this way. If set to FALSE, once OK is selected, the program uses the default settings
to search for the radio. If set to TRUE, the program will begin a systematic process
beginning with the first valid port (COM 1 in most cases) then will cycle through
each baud rate, then each parity setting, then each stop bit setting finally changing to
the next available COM port and repeating the process until a radio is found.
