Four-Faith F8914-E, User Manual

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F8914 User Manual
Xiamen Four-Faith Communication Technology Co.,Ltd.
Page 21 of 26
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4.4 Modes of Operation
F8914 supports three modes of Operation:Transparent Mode,AT Command Mode and API
Mode.
4.4.1 Transparent mode
When operation in transparent mode the modules act as a serial line replacement. All UART
data received through the DIN pin is queued up for RF transmission. When data is received, the
data is sent out through the DOUT pin.
Re-power module enter the transparent mode by default.
To enter transparent mode:

In the AT command mode,send “AT+ESC <CR><LF> ”through serial port.

In the API mode, send “FE 01 21 2A 00 0A” through serial port.
4.4.2 AT command mode
AT command mode is a multiple function operation. This mode can configure the modules
parameters,send data and receive data.
To enter AT command mode:

In the transparent mode,send the 3-character command se++”twice through
serial port.

In the API mode,send “FE 01 21 2A 00 0A” through serial port.
CHECK the AT command mode,send “AT
<CR><LF>
” through serial port, it will return
“OK”.
All AT command line should begin with “AT” or “at” and end with “
<CR><LF>
”.In
general, the AT command includes three forms, as shown in table 3-1.
Table 3-1 AT command forms
Form
Description Instance
Set Set the custom parameters AT+XXX=<……>
Query Query the current parameters
value AT+XXX?
Execute Execute the command AT+XXX
Note: every configure item is set, it should send save command.Network param(PAN ID,Physical
Channel ,node address or device type changed),sleep param and serial param change should
re-power device.
4.4.3 API mode
API operation requires that communication with the module be done through a
structured interface (data is communicated in frames in a defined order). The API specifies how
commands, command responses and module status messages are sent and received from the
module using a UART Data Frame.