Users Manual

www.wireless-tag.com WT52840-S1
10
/
27
Wireless-Tag Technology www.wireless-tag.com [e-mail]
4-2. In order to save volume, the module adopts TXD/RXD dual-wire serial port mode, without
increasing data flow control, it is recommended that the serial port rate should not be set too
high to avoid packet loss problems. It is recommended to use 115200bps, and the highest can
be set to 250000bps;
4-3. The default Bluetooth connection interval time of the module is 45ms. If you need to save
power consumption and adopt low-speed forwarding mode, you can adjust the Bluetooth
connection interval through AT commands. The longest Bluetooth connection interval is
2000ms.
5. Serial AT Commands Description
The module will automatically identify and distinguish serial port data. The data packet with the
beginning of AT+ will be defaulted as AT command and parsed, and the processing result will be
returned. Therefore, the data in transparent transmission mode cannot start with AT+ characters.
No.
Command
Description
Permission
1
AT+TEST
AT firmware test
Allowed
2
AT+VERSION?
Query firmware version
Allowed
3
AT+RESET
Reset
Allowed
4
AT+BAUD=
Set serial baud rate
Allowed
5
AT+ADDR?
Query MAC address
Allowed
7
AT+ADDR=
Set MAC address
Allowed in disconnected state
8
AT+ROLE?
Query role
Allowed
9
AT+ROLE=
Set role
Allowed in disconnected state
10
AT+NAME?
Query Bluetooth name
Allowed
11
AT+NAME=
Set Bluetooth name
Allowed in disconnected state
12
AT+ADP=
Set Bluetooth
advertising interval
Allowed in disconnected state
13
AT+ADV_START
Start advertising
Allowed in slave mode and
disconnected state
14
AT+ADV_STOP
Stop advertising
Allowed in slave mode and
disconnected state
15
AT+SCAN_START
Start scanning
Allowed in master mode and
disconnected state
16
AT+SCAN_STOP
Stop scanning
Allowed in master mode and
disconnected state
17
AT+CIT=
Set Bluetooth connect
interval time
Allowed in disconnected state
18
AT+CONN=
Set the MAC address of
the target device
connected in master
mode
Allowed