User Manual
HLK-B40
7
BAND
Serial.
Porter rate
1200,2400,4800,9600,14400,
19200,38400,57600,115200,
230400,460800,921600
Default
：
115200
send
response
AT+BAND=?
AT+BAND=115200
OK
send
response
AT+BAND=230400
AT+BAND=230400
OK
8
RFPOWER
Bluetooth.
Transmit power
1-18, 18 grades
Default: 8
The smaller the transmission
distance, the lower the power
consumption; the larger the
transmission distance, the
greater the power
consumption
send
response
AT+RFPOWER=?
AT+RFPOWER=8
OK
send
response
AT+RFPOWER=10
AT+RFPOWER=10
OK
9
SLEEPEN
auto sleep
Enable
0 disable sleep
1 enable sleep
Default value: 0
After enabling, the module
will automatically enter the
sleep state according to the
control of the level of the
SLEEPEN input pin
send
response
AT+SLEEPEN=?
AT+SLEEPEN=0
OK
send
response
AT+SLEEPEN=1
AT+SLEEPEN=1
OK
10
CONNI
Bluetooth
Connection
interval
6
～
3200
，
The unit is 1.25ms, i.e. 7.5-
4000ms.
The default value is 24
The smaller the transceiver,
the faster the power
send
response
AT+CONNI=?
AT+CONNI=24
OK
send
response
AT+CONNI=8
AT+CONNI=8
OK
11
ADVI
Bluetooth
Broadcast
interval
Unit: 625us
Recommended value:
80,160,320,800,
1600,3200
Default value: 800
send
response
AT+ADVI=?
AT+ADVI=800
OK
send
response
AT+ADVI=1600
AT+ADVI=1600
OK
12
ADVDATA
Self-define
Broadcast data
Hexadecimal number, the
number of characters is a
multiple of 2, up to 40
hexadecimal numbers
Default: none
send
response
AT+ADVDATA=?
AT+ADVDATA=03FF1A1B
OK
send
response
AT+ADVDATA=68696C696E6B
AT+ADVDATA=68696C696E6B
OK
