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Chongqing Jinou Science &Technology Development Co., Ltd .
http://www.oemblue.com/ [e-mail]
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7 Two serial adapter can not connect with each other
Use Configuration Tools to inquiry and confirm whether one of the 2 modules is a Master
device, the other one is a Slave device; whether the passwords and Category Codes of the
two modules are the same, and if they are not, you should use the Configuration Tools to
modify them into a same value.
Whether the master device has memorize other module’s address. If it is, please remove it.
Besides, please check whether there are other Bluetooth setting or not. If there are, please
close it.
Whether the module has set the Bind Address option and connected with other devices. If
it is, please remove the Match Setting addresses first. Because, for the Slave device, it is
not allowed to be inquired and matched and only can be connected with its memorized
devices if it has memorized the address; for the Master device, it will try to connect with
its memorized devices all the time if it has memorized the addresses.
8 Why PC, USB Dongle can not find the serial adapter?
Firstly, ensure whether the serial adapter be set as a Slave device. For the serial adapter, the
master device can not be found by other devices.
Whether the adapter has set the Bind Address option and connected with other devices. If it
is, please remove the Match Setting addresses first. Because, for the Slave device, it is not
allowed to be inquired and matched and only can be connected with its memorized devices
if it has memorized the address.
9 Why PC USB Dongle and serial adapter can not realize data
communication or only communicate by one-way data
communication?
First, make sure whether the two devices establish a connection, judging by looking at
whether the Link indicator of the Bluetooth extinguish;
Check whether the serial cable connection is correct
Whether the serial port of the using serial adapter’s application program of the using the
serial port is the same of the serial port parameter of the adapter’s configuration. If the
serial adapter has set the flow control, PC-side application should be selected for hardware
flow control or CTS / RTS flow control; if connect to MCU, MCU should also process
CTS and RTS pin in accordance with the RS232 protocol.
If determines not to use flow control, use " AT+FLOWCONTROL\r\n " command to
cancel it.
If communicates large amounts of data with high-speed, it is strongly recommended to use
flow control function, or it may cause data loss or a adapter reset.
.