HF2111 GPRS Serial Server User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
14/29
4. AT+INSTRUCTION INTRODUCTION
4.1. Configuration Mode
When HF2111 power up, it will default works as transparent transmission mode, then user can
switch to configuration mode by serial port command. HF2111 UART default parameters setting
as below figure,
Figure 6.
HF2111 Default UART Port Parameters
In configuration mode, user can setting the product through AT+instruction set, which cover all
web page setting function.
4.1.1.
Switch to Configuration Mode
Two steps to finish switching from transparent transmission mode to configuration mode.
UART input “+++”, after product receive “+++”, and feedback “a” as confirmation.
UART input “a”, after product receive “a” and feedback “+ok” to go into
AT+instruction set configuration mode.
Figure 7.
Switch to Configuration Mode
Notes:
1. When user input “+++” (No “Enter” key required), the UART port will display feedback
information “a”, and not display input infor++” as above UART display.
2. Any other input or wrong step to UART port will cause the product still works as original mode
(transparent transmission).
