5
IV.
Operation Instruction
The default setting of this device is 9600bps baud rate, 8-n-1 communication mode, no flow
control, slave device, and matching code is 000000.
If need to change parameters, user should press the mode switch button to enable the adapter to
enter the parameter setting state. The two previously blinking indicator lights are off and relevant
parameters are set through the "AT command", such as the parameters of master/slave device,
baud rate, remote address, etc.
If 2pcs adapters need to communicate, user must set one as master device and another as salve
device. User can tell roles from operation indicator light.
Note: the parameters are stored in FLASH, so the values of the parameters will remain the same
even after the power is cut, and will not be lost.
After parameter modification, short press the mode switch button again to enable the adapter to
enter data mode.
The adapter should be in data mode when powered on. For the master device, if the address has
been memorized, the master device is directly connected to the memory device, which can be
cleared by the "AT+CLEARADDR" instruction.
For slave devices, wait to be queried and connected by other devices.
If the two adapters are connected successfully, the connection status indicator (green light) is off
and the master/slave mode indicator (red light) remains flashing. At this point, the user device is
just like a serial port connection, sending and receiving data directly.
Once the device is connected, our serial port adapter will not be automatically disconnected unless
the signal is poor or the other party's Bluetooth is actively disconnected, and the connection will
remain.
Note: the following frequently asked questions section gives an important supplement to the use of
the equipment and solutions to the problems that customers usually encounter. Please read this
section carefully before using.
V.
Description of the authentication mode
The BLE serial port adapter only stores the matching information of one master device at most.
Therefore, when the authentication function is enabled and matched with the master device (such
as IOS, Android phone or tablet), the matching connection with the new master device will first
clear the previous host matching information. Therefore, a rematch is required when the previous
master device connects to the BLE serial adapter again.
However, when some master devices (such as IOS Ipad) are connected again, because the
matching information of the BLE serial port adapter is saved before, the master device does not re-
initiate the match after receiving the BLE serial port adapter re-matching request, which will result
in authentication failure and thus disconnection. In the case of disconnection, first delete the BLE
serial port adapter matching information in the Bluetooth option of the master device's system
settings, and reconnect it again.
