ACELEX DX-BT12 4.0 Bluetooth Module User Manual

ACELEX DX-BT12 4.0 Bluetooth Module

Feature

• Bluetooth protocol: Bluetooth Specification V4.0 BLE, transceivers haven’t byte restrictions
• Working frequency：2.4GHz ISM band
• Modulation： GFSK(Gaussian Frequency Shift Keying) Sensitivity：≤-84dBm at 0.1% BER
• Security features： Authentication and encryption
• Support service：Central & Peripheral UUID FFE0,FFE1,FFE2 Power consumption:
• Low-power mode: standby current 1-3mA, Iphone is 3mA, Android is 8mA when transmission.
• Normal working mode: standby 8mA, transmission 8mA.
• Power supply：+3.3VDC 50mA
• Size：22mm x 12mm x 2mm
• Bluetooth certification：BQB, FCC, ROHS, REACH
• Transmission distance：10-12m

Physical Feature

Operating Voltage

Transparent transmission parameters

UART parameter

Data throughput
SPP data throughput

BLE data throughput

time-consuming(ms)

| 50
Sending interval(ms)| continuous

sending

| Sending interval(ms)| continuous

sending

Throughput

(bytes/sec)

| 4291| Throughput

(bytes/sec)

| 4274
UART->DX-BT12->IPhone 5| UART->DX-BT12->Android
---|---
Baud rate| 3000000| Baud rate| 3000000
Connection interval (ms)| 18.75| Connection interval (ms)| 18.75
Characteristic writing way| Write         without

Response

| Characteristic writing way| Write  without

Response

App data size (bytes)| 53260| Sending file size (bytes)| 50000
Sending interval(ms)| 20| Sending time-consuming(s)| 50
Throughput

(bytes/sec)

| 4635| Throughput

(bytes/sec)

| 1916

For reference only

Application circuit

Pin Function

when off

After the Module is powered off, the IO that the

MCU is not connected to must be driven low.

3| I| REGEN| Module Power-on test pin, need to pull up to

VBAT (Note: must be pulled high, otherwise the module can not start)

4| P| VREGOUT_HV| 3.3V LDO output PIN, the maximum output

current of this power is 300mA

5| P| VDDIO| Module IO port power supply (1.7 ~ 3.6V, the customer can according to the IO voltage

The size of their own configuration within the

scope of the voltage size, the default is 3.3V)

6| P| VREGOUT_MV| Internal 1.8V LDO output pin, the maximum output current of this power supply is 200mA
---|---|---|---
7| I| WAKE_UP| Module wake-up pin:

1.    When Module enters hibernation, the PIN will detect a rising edge change

Module is awakened and Module enters pairing after waking up (power-on default is high).

2.   When the module is enabled Sniff mode (serial command set), MCU to

Module must pull low when sending data to wake module up and then delay

≥ 2ms and then send data.

8| P| NC| NC
9| O| NC| NC
10| O| STATUS_IND| Bluetooth connection status: High level – fail connect

Low level – connect successfully

11| N/A| NC| NC
12| N/A| NC| NC
13| I| UART_CTS| UART flow control, the flow control function is enabled by default. When the module detects this PIN is high, it indicates that the MCU processes. However, the Module will stop transmitting data to the MCU. The Module will wait for the PIN to be low before restarting the

data transmission.

14| O| NC| NC
15| O| UART_RTS| UART flow control, flow control enabled by default, when the Module data processing comes however,

This IO output to inform the MCU high; low level can receive MCU normally

The data.

16| I| NC| NC
17| I| NC| NC
---|---|---|---
18| I/O| PIO3| GPIO
19| I| RST_N| Module reset pin: active low
20| I| UART_RX| Module data transmission port
21| O| UART_TX| Module data transmission port
22| I/O| PIO4| GPIO
23| I| POWER_OFF| Module shutdown pin, pull-up input

The module shuts down when it detects a low level of 50ms or longer

Power  off  the  module  boot,  only  need  to

WAKE_UP pin low to boot

24| I| GPIO20| GPIO
25| I| LINK_DROP| Module disconnect pin:

The module is disconnected when the module detects a low pulse of more than 50ms while the PIN is connected

The current connection, enter the pairing (this

PIN power-on default is high)

26| O| NC| NC
27| O| NC| NC
28| O| LED0| Bluetooth work indicator (not connected status: uniform slow flashing 800ms-on,

800ms-off; connection status: Always), this pin is

an open drain output.

29| P| GND| Ground
30| NC| NC| NC

Size：

AT Instruction set
Users can communicate via a serial port and a Bluetooth chip. The serial port uses Tx, Rx, two signal lines, baud rate supports 9600, 19200, 38400, 57600, 115200bps. The default baud rate of the serial port is 9600bps. The DX-BT12 dual mode Bluetooth serial module instruction is the Command instruction set. （P.S. if send AT instruction, must use ENTER key or \r\n; 16 hexadecimal regards ODOA as ending. It doesn’t need < > when input commend.
The AT instruction can only take effect in the unconnected state of the module. Once the Bluetooth module is connected to the device, the Bluetooth module enters the data transmission mode.）

Instruction detailed description

（AT Instruction must use a capital letters， return key, and index character as ending：\r\n）

1. Get the software version number：
   Instruction| Response| Parameter
   ---|---|---
   AT+VERSION| +VERSION=| ：Software version number
2. Setting / querying SPP 2.0 device name：（Effect after Reboot）
   Instruction| Response| Parameter
   ---|---|---
   AT+SPPNAME| OK| ：Bluetooth device Default name：“BT12” Max length：18 bytes
   AT+SPPNAME| +NAME=

For example：

1. Send setting：
2. Send query：
3. Setting / querying BLE 4.0 device name
   Instruction| Response| Parameter
   ---|---|---
   AT+LENAME| OK| ：Bluetooth device Default name：“BT12” Max length：18 bytes
   AT+LENAME| +NAME=
4. Get SPP 2.0 Bluetooth address:
   Instruction| Response| Parameter
   ---|---|---

   ---

AT+SPPMAC

| + SPPMAC

=

| Param:Bluetoothaddress
5. Get BLE 4.0 Bluetooth address: 6.Set / query – serial baud rate:
Instruction| Response| Parameter
---|---|---

AT+LEMAC

| ****

=+LEMAC

=

| Param:Bluetoothaddress
6. Set / query – serial baud rate:
Instruction| Response| Parameter
---|---|---
AT+BAUD| OK| ：baud rate（bits/s）
AT+BAUD|  | +BAUD=| The values (decimal)：

1——1200

 |  |  | 2——2400
AT+BAU| D|  | 3——4800
 |  |  | 4——9600
 |  |  | 5——19200
 |  |  | 6——38400
 |  |  | 7——57600
 |  |  | 8——115200
 |  |  | Default：4

For example：Set the serial port baud rate to 38400

1. Send setting：
2. Send query：

7. Reset software
   Instruction| Response| Parameter
   ---|---|---
   AT+RESET| OK| NA
8. Power off software
   Instruction| Response| Parameter
   ---|---|---
   AT+PWROFF| OK| NA
9. Set whether to enter the low power consumption (this command can not be saved when no power):
   Instruction| Response| Parameter
   ---|---|---
   AT+PWRM| +PWRM=| Param：（0、1）
    | OK| 1-Enter low power consumption 0-work normally

Defaults: 0

AT+PWRM| +PWRM=
10. Query \ set BLE broadcast time:
Instruction| Response| Parameter
---|---|---
AT+ADVI| +ADVI=| Param：（ms）
 | OK| The unit is 1ms Default: 165ms
AT+ADVI| +ADVI=
11. Set GPIO port:
Instruction| Response| Parameter
---|---|---
AT+GPIO| + GPIO =| Param：（1R1、1R0、2R1、

2R0、3R1、3R0）

 | OK| Corresponding IO port: GPIO3: 1R1 high

1R0 low

GPIO4: 2R1 high 2R0 low

GPIO20: 3R1 high

3R0 low

AT+GPIO| +GPIO=

For example：(Set GPIO4 output port as high level)

1. Send command：

AT+GPIO2R1\r\n Return：OK\r\n ——SGPIO4 output is high——Settingsuccessfully

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