
Chapter 10: Serial Ports
Overview
75
Psion Mobile Devices Developers Guide
10.1 Overview
Serial ports can be dynamically added to, and removed from, Psion computers. Also, on some computers,
serial ports can change their physical location. COM ports may be associated with actual physical serial
ports, or they may be assigned to a device that acts like a serial port, such as an IrDA port, a USB port, or a
Bluetooth device.
Serial ports can appear on (attach), or disappear from (detach), a Psion computer dynamically. For example,
a new serial port appears when a 753x computer is placed into a charger with a port replicator attachment,
or if a modem card is inserted into a card slot. These ports can then disappear if the Psion computer is
removed from the charger, or if the modem card is removed from the card slot. Events are generated when
serial ports attach or detach.
Bluetooth
BSP ports 1-9 can be used to add a Bluetooth virtual COM port. For setup instructions see the User Manual
for your Psion computer.
10.2 Workabout Pro Serial Port Assignments
Table 10.1 Default Workabout Pro Serial Port Assignments
Note 1: For more information see
community.psion.com/knowledge/w/knowledgebase/bthatci-service-using-com-7.aspx
All COM ports can be reassigned unless indicated otherwise in Table . Reassignment is done either using
the Psion COM Port Manager GUI program, or in the Windows registry.
For information on using the COM Port Manager, refer to the user manual for the Psion computer.
Workabout Pro: Only COM0: to COM9: are available.
Serial Port Default Assignment
BSP 1-9 Bluetooth virtual devices.
COM0
COM1 On 100-pin expansion connector.
COM2 Serial port on the tether port.
Workabout Pro: Adapter is required.
Workabout Pro G2 and Workabout Pro3: No adaptor is required.
COM3 Cannot be reassigned.
Internal scanner or imager.
COM4 Cannot be reassigned.
USB client port—used by ActiveSync.
COM5 RS-232 port A on port replicator, and serial port available on USB-to-serial adaptor. This
port is not available during suspend, when the USB driver is unloaded.
COM6 RS-232 port B on port replicator. This port is not available during suspend, when the USB
driver is unloaded.
COM7 Bluetooth Command Interpreter (blocked) See Note 1.
RS-232 port C on port replicator. This port is not available during suspend, when the USB
driver is unloaded.
COM8 Virtual port—for WWAN GSM
COM9 Cannot be reassigned.
IRCOMM port.
COM20 Cannot be reassigned.
Internal Bluetooth radio.
COM21 Built-in USB-Serial adaptor port.
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