4.Communication Interface
1. RS232(COM)：standard RS232 Communications Protocol
2. Bluetooth 2.0：standard Bluetooth 2.0 Communications Protocol
3. USB：standard USB Communications Protocol
4-1. RS-232 Serial Interface
RS-232 is developed according to the EIA standard asynchronous transmission, the
specifications are as following:
Data transmission: serial interface
Synchronization: asynchronous
Signal Level: RS-232 level, logic 1:-5.4v, logic 0 : +5.4v
Hardware Flow Control: None
Baud rate: 2400pbs to 115200pbs is optional
Data word length: 8 bits
Stop bit: 1bit
Parity: None
Users can get the current baud rate from the printer self-testing page.
Serial cable: We have made the cable specially using mini port like Mini USB port which
connects the printer .The following picture shows the signal definition of the RS-232 Serial
interface:
The connection between the printer and host follows the following rules:
Printer Host
TXD RXD
RXD TXD
GND GND
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