CL4490 User Guide
Version 3.0
Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852-2923-0610
www.lairdtech.com/ramp
18
Laird Technologies
Force 9600 Baud Recovery
To force the serial interface to a known value, follow these steps (this also sets the RF Packet Size and
Interface Timeout to default values):
1.
Remove power from the radio.
2.
Remove the screws on the case and slide the radio out.
3.
Bridge pins 2 and 10 (a wire or tweezers work on this low voltage line) as shown in
Figure 6: CL4490 with jumper pins highlighted
4.
Connect the radio’s external serial port to the PC via a straight-through cable.
5.
Power on the radio.
6.
On the PC Settings tab, click Find Ports.
7.
Select the appropriate port from the drop-down menu.
8.
Set the rest of the settings to the following:
Baud Rate: 9600
Parity: None
Handshaking: Hardware
Data Bits: 8
Stop Bits: 1
9.
Under Options, ensure the
Read/Write with AT Commands
checkbox is selected.
10.
Ensure the
Port Status
is open.
11.
On the Configure tab, click Read Radio.
12.
Set the
Interface Baud Rate
to the appropriate value and click Write Radio.
13.
Power off the radio.
14.
Remove the jumper.
15.
Power on the radio.
16.
On the PC Settings tab, set the Baud Rate to the baud bate you configured on the radio.
17.
On the Configure tab, click Read Radio.
