MOBILE TECHNOLOGIES MTI8038 Bluetooth Serial Adapter User Manual

MOBILE TECHNOLOGIES MTI8038 Bluetooth Serial Adapter User Manual

Technical Specifications

Power Consumption

Mode| Test Condition (Slave

Device)

| Maximum

mA

| Typical

Value mA

| Minimum

mA

---|---|---|---|---
Connected| Data transmission| 14.7| 12.6| 12.1
No connection| Connect （inquiry） interval=2048 Connect （inquiry） continue=18| 17.2| 8.9| 7.8

Notes:
Under regular mode, all parameter is default.

The connection distance between this adapter and smart device is 10 meters. It continuously sends data at the same time with 38400 baud rate.

Description of LED indicator and inner button

There are two LED indicators on the serial adapter, one indicates connection status and one indicates master/slave mode.

Master/slave mode indicator (red)

In the parameter setting mode, this indicator is off.
In the data working mode, this indicator will be in the following status：

Connection status indicator (green)
In the parameter setting mode, this indicator is off.
In the data working mode, this indicator will be in the following status：

Inner button： There is a button on PCB inside the black case. If need to restore factory settings, please press this button for 2 seconds.

Instructions

Power on this product.
The default factory setting of the adapter is 38400bps baud rate, 8-N-1 communication mode, no flow control. The match code is 1234.

In the data working mode, the Bluetooth smart device of the user terminal will search for the adapter, and after the authentication is passed, it will remember (save) the address of the adapter and establish a connection. The stored address and default connection password can be cleared by AT commands and parameter setting tools. If you need to modify the parameters, send “+++” within 30 seconds after power-on to enter the parameter setting mode, and use the relevant AT commands to set parameters, such as baud rate, authentication, and binding address.

The adapter is connected successfully, the connection indicator (green light) is off, and the status indicator (red light) keeps flashing. At this point, data can communicate with each other. For user equipment, this adapter can replace serial cable and receive data directly.

Once the connection is established, unless the user device has a weak signal or actively disconnects Bluetooth, the adapter will not actively disconnect, and the connection will remain.

Note: This parameter is stored in the Bluetooth chip. Therefore, even if the power is turned off, the parameters will remain the same as last time and will not be lost. After the parameter modification is completed, please send “AT+exit” or power on again to make the adapter enter the data mode.

If it is used for in-vehicle communication, it needs to cooperate with smart devices (Android V7.0 or above, IOS 8 or above) to conduct data communication through the MTI APP to collect vehicle information data.

AT Command

Note：

• The parameter setting command can be executed only when the serial adapter is in the Parameter Setting mode(that is, power on and send “+++”). After the parameters are modified, please return to data mode and then the parameter settings take effect.
• Each command must make the two bytes (\r\n)carriage return and line feed ((ASCII codes are 0x0D, 0x0A) as the end sign, or command can not be identified.
• The brackets “<>”outside of the parameter is added for convenient reading and the actual command is without the “<>”.

1. Test Command
   Command| Response| Parameter
   ---|---|---
   AT\r\n| \r\nOK\r\n| None
2. Set / Inquire the baud rate
   Command| Response| Parameter
   ---|---|---
   AT+BAUD=\r\n| \r\nOK\r\n| rate：baud rate（1200、2400、4800、9600、19200、38000、38400 、 57600 、 115200 、230400、460800、921600）

Default：38400

AT+BAUD?\r\n| \r\n＋BAUD：\r\n

\r\nOK\r\n

3. Set / Inquire flow control mode
   Command| Response| Parameter
   ---|---|---
   AT+FLOWCONTROL=\r\n| \r\n OK\r\n| ：

0：No flow control

1：adapt hardware flow control

Default：0

AT+FLOWCONTROL?\r\n| \r\n＋FLOWCONTROL：\r\n

\r\n OK\r\n

4. Set/Inquire device name
   Command| Response| Parameter
   ---|---|---
   AT+NAME=\r\n| \r\n OK\r\n| name：device name Default: definition according to the specification of products (when modifying, no more than 29 bytes.)
   AT+NAME?\r\n| \r\n＋NAME：\r\n

\r\n OK\r\n

5. Set / Inquire whether authenticate
   Command| Response| Parameter
   ---|---|---
   AT+AUTH=\r\n| \r\n OK\r\n| enable: 0: Disable simple pairing 1: enable simple pairing Default：1
   AT+AUTH?\r\n| \r\n＋AUTH：\r\n

\r\n OK\r\n

Authentication: the security authentication is provided by this serial adapter. Only the authenticated users can communicate with it. If it is a pair of serial adapters, these processes are done automatically. When AT+AUTH=1, the serial adapter will automatically use the simple pairing mode to authenticate the device that supports simple matching. For the device that does not support simple matching, the serial adapter will authenticate the password (default password: 1234).

6. Set / Inquire authentication password
   Command| Response| Parameter
   ---|---|---
   AT+PASSWORD=\r\n| \r\n OK\r\n| password：

Default：1234(No more than 4 or 6 Bytes)

AT+PASSWORD?\r\n| \r\n+PASSWORD:\r\n

\r\n OK\r\n

7. Set / Inquire device type
   Command| Response| Parameter
   ---|---|---
   AT+CLASS=\r\n| \r\n OK\r\n| cod：device type(The length must be 6 bytes. )

Default：000000

AT+CLASS?\r\n| \r\n＋CLASS：\r\n

\r\n OK\r\n

Device type: When the device type is keyboard, simple pairing must be enabled (AT+AUTH=1). Otherwise, the module may fail to pair the remote device.

8. Set / Inquire device role
   Command| Response| Parameter
   ---|---|---
   AT+ROLE=\r\n| \r\n OK\r\n| role：

0：slave role

1：master role

Default：0

AT+ROLE?\r\n| \r\n＋ROLE：\r\n

\r\n OK\r\n

9. Exit the parameter setting mode
   Command| Response| Parameter
   ---|---|---
   AT+EXIT\r\n| \r\n OK\r\n| None
10. Set / Inquire whether it is bind
    Command| Response| Parameter
    ---|---|---
    AT+BIND=\r\n| \r\n OK\r\n| enable：

0: not bind address

1: bind address

Default: 0

AT+BIND?\r\n| \r\n＋BIND：\r\n

\r\n OK\r\n

When binding the address: If the address has been memorized, the query matching is not allowed, and it can only be connected through its storage device; once the adapter has memorized the address, it can only establish a connection with the device it has memorized, and cannot establish a connection with other devices. . Therefore, when binding the address, if you want to establish a connection with another device, you must clear the stored address.

11. Set/Inquire the memorized remote Bluetooth device
    Command| Response| Parameter
    ---|---|---
    AT+RADDR=\r\n| \r\n OK\r\n| addr ： remote    Bluetooth address
    AT+RADDR?\r\n| \r\n+RADDR:\r\n

\r\n OK\r\n

If the adapter is not bound to the address, it can still be connected by other Bluetooth devices. If an address is bound, the binding address can be set by this command.

12. Clear the memorized address
    Command| Response| Parameter
    ---|---|---
    AT+CLEARADDR\r\n| \r\n OK\r\n| None
13. Inquire remote Bluetooth devices
    Command| Response| Parameter
    ---|---|---
    AT+INQ\r\n| \r\n OK\r\n

\r\n+INQRESU                                     ：