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CCT24
Click on
Connect
to open the
Select Comm Port Settings
dialog box, as shown in Figure 5.6.1.2. Set the
baud rate to 9600 (9.6 kb/s). Set the
CommPort
to match the serial port connected to the Base, either the
hardware port or the USB virtual serial port. Then click
OK
to activate the serial connection.
Figure 5.6.1.2
At this point the Demo will collect data from the Base, filling in data in the
Local Radio
column on the
Demo window. The
Status Window
should also show that the Remote has joined the Base. Click on the
drop-down box at the top of the
Radio 1
column and select the
MAC Address
for the Remote. Next press
the
Start
button using the default 1 second
Refresh Delay
.
The Demo will display updated data on the Remote in the
Radio 1
column, including bar graphs of
RSSI
signal strength in dBm and percent packet success rate. Adjusting the large pot on the Remote can be
observed on the
Potentiometer (ADC1)
row.
To perform serial data loop back testing with the kit, move the two jumpers on the Remote board labeled
Ext_TX
and
Ext_RX
to connect the center and right header pins. This disconnects the module’s TX and
RX pins from the USB and RS-232C circuits. Use a banana clip or other short jumper to connect together
the two pins on the header labeled J11 (
Ext_MICRO)
. Attempting loop back testing by connecting Pins 2
and 3 of the DB9 serial connector can cause erratic behavior due to noise coupling from the serial TX and
RX lines into the weakly pulled up flow control lines on the board.
In order to turn off the DCD LED (D4) on the development board in sleep mode, the
GPIO_ SleepState
parameter in the CCT24 has been set to 0xC0 rather than the factory default value of 0x00. If the CCT24
is reset to its factory defaults, the DCD LED with remain on in sleep mode until the
GPIO_ SleepState
is
set to 0xC0. See Section 4.2.7 for additional information on the
GPIO_SleepState
parameter.
If any difficulty is encountered in setting up the CCT24DK development kit, contact RFM’s module tech-
nical support group. The phone number is +1.678.684.2000. Phone support is available from 8:30 AM to
5:30 PM US Eastern Time Zone, Monday through Friday. The E-mail address is [email protected].
5.6.2 Serial Communication and Radio Configuration
