A member of the Olancha Group Ltd
Registered in England No. 08405712
VAT Registration No. GB163 04 0349
Siretta Ltd
Basingstoke Road
Spencers Wood
Reading
Berkshire RG7 1PW
sales
fax
email
web
+44(0)118 976 9014
+44(0)118 976 9020
www.siretta.co.uk
25
ZETA Series
GPRS/UMTS/LTE Terminal with GPIO
The ZETA series modems support a standard USB 2.0 device interface compatible
with USB 2.0 specifications and supporting the USB low-speed [1.5 Mb/s] and
full-Speed (12 Mb/s) modes. The USB port can be used to send AT-commands,
reprogram the modems and view debug output. The maximum baud rate available to
communicate with the ZETA series modems is up to 12 Mbit/s.
Drivers are required to use the USB port and are available for several operating
systems including Windows/Linux. Please contact Siretta for more information.
In HSDPA (High Speed Downlink Packet Access) mode, the downlink data speed
rates can be up to 7.2Mbps. To achieve this network data rate using the ZETA,
integrators need to interface the ZETA to their applications in full-speed (12 Mb/s)
mode.
The device driver creates 6 virtual COM ports on the system for access to the
module. 4 of these ports can be configured for use as general purpose AT command
communication ports or as GPS NMEA communication ports depending on the
module version.
*
USB0
→
AT Command Interface 1
USB1
→
Trace Port
USB2
→
Unused
USB3
→
AT Command Interfaces 2
USB4
→
Unused
USB5
→
Unused
The ZETA series modems do not support autobauding. Integrators have to set the
correct speed for serial communication before device initialization. If the right speed is
set, the device responds with OK. The default baudrate is 115200.
To change the baudrate:
»
Send command AT+IPR=<rate><cr>
»
Wait for ‘
OK
’ response
USB Interface Drivers
Supported baudrates
<CR>
»
2400
Carriage return
»
4800
»
9600
»
19200
»
38400
»
57600
»
115200
»
230400
*
Please see the following command 'AT#PORTCFG' to configure
these ports on your modem.
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