User's Manual

13 ProBee-ZE20S Series User Guide Rev.0.1
2.1.4 Serial/USB Cable Installation
After the ZE20S is securely installed on the development board, please connect the included serial cable
between the development board and your computer so AT commands can be sent from the computer to
the ZE20S module. The serial port of the development board is DB9 male as a DTE terminal, and the
serial cable included is a cross-over cable for DTE-DTE connection. To use the serial port, the HOST
(SW2) switch should be set to UART.
TBD
Figure 2-4 Serial Cable Installation
In case the serial port is not available for the computer, you can use the USB port of the development
board instead. In this case, the internal USB-RS232 converter of the development board will convert the
USB signal to the RS232 signal and vice versa. To use the USB port, the HOST (SW2) switch should be
set to USB and the software driver for the USB in the CD should be installed on the computer. For the
USB driver installation, please refer to the section 2.1.6.
TBD
Figure 2-5 USB Cable Installation