User Guide

4
2 Communication Interfaces
The TEEMI 2D Barcoder Reader provides a TTL-232 interface and a USB interface to communicate with the
host device. The host device can receive scanned data and send commands to control the engine or to
access/alter the configuration information of the engine via the TTL-232 or USB interface.
TTL-232 Cable Select (Applicable to 3110) 2.1
Before using Serial Communication interface, scanner must be set as TTL-232 cable.
232 Cable
TTL-232 Interface 2.2
Serial communication interface is usually used when connecting the engine to a host device (like PC, POS).
However, to ensure smooth communication and accuracy of data, you need to set communication
parameters (including baud rate, parity check, data bit and stop bit) to match the host device.
The serial communication interface provided by the engine is based on TTL-level signals. TTL-232 can be
used for most application architectures. For those requiring RS-232, an external conversion circuit is
needed. The conversion circuit is available only to some models.
Default serial communication parameters are listed below. Make sure all parameters match the host
requirements.
Parameter
Factory Default
Serial Communication
Standard TTL-232
Baud Rate
115200
Parity Check
None
Data Bits
8
Stop Bits
1
Hardware Flow Control
None