User Manual

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5
send the command control module related functions. Note: because the
computer serial port is not TTL level, connect the computer
communication, it is necessary to connect the RS323 level to TTL power
leveling device or the USB TTL level serial port module to communicate
with this module. This operation requires professionals.
10>. User Settings
This module can set the backlight state according to the user's
specific usage. When the power is off, press the FRE button to turn on,
and the B0 indicates that the backlight is always bright. B0 indicates that
the backlight is closed for 20 seconds, and the setting is effective after
the restart. Change the Settings state to repeat this step to switch. The
backlight has no operation for 20 seconds.
11>. Stereo /mono switch terminal.
Stereo/mono terminals are used to set the FM receiving mode of the
module. This terminal is suspended for Stereo reception mode, and it is a
single channel receiving mode.
6. FM with squelch receiver module AT instruction:
Baud rate: 38400 TTL level
No.
Name
Example
Instruction
Range
Return
position
1
Set current
frequency point
AT+FRE=875
current
frequency point
is 87.5MHz
870-1080
MHz
Current
frequency
point/ERR