Serial Port Bluetooth Module (Master)

Industrial serial port bluetooth, Drop-in replacement for wired serial connections, transparent usage. You can use it simply for a serial port replacement to establish connection between MCU and GPS, PC to your embedded project and etc.

Default serail port setting: *****0(optional ***0, ***0, ****0), N, 8, 1

Pairing code: ***4

Running in slave role: Pair with BT dongle and master module.

Specification:

Bluetooth protocal: Bluetooth Specification V2.0+EDR

Frequency: 2.4GHz ISM band

Modulation: GFSK(Gaussian Frequency Shift Keying)

Emission power: ≤ 4dBm, Class 2

Sensitivity: ≤ **4dBm at 0.1% BER

Speed: Asynchronous: 2.1Mbps(Max) / **0 kbps; Synchronous: 1Mbps/1Mbps

Security: Authentication and encryption

Profiles: Bluetooth serial port(master & slave)

CSR chip: Bluetooth V2.0

Wave band: 2.4GHz— 2.8GHz, ISM Band

Protocol: Bluetooth V2.0

Power Class: (*6dBm)

Reception sensitivity: **5dBm

Voltage: *3.3V *0mA (2.7V— 4.2V)

Current: Paring - *5mA, Connected - 8mA

User defined Baud rate:

**0, ***0, ***0, ****0, ****0, ****0, *****0, *****0, *****0, *****0, ******0

Dimension: *6.9mm**3mm*2.2mm

Coupled Mode: Two modules will establish communication automatically when powered.

PC hosted mode: Pair the module with bluetooth dongle directly as virtual serial.

Pin Definition:

Common Pin Explanation:

1, PIO8 connects with LED cathodea with **0ohm series resistor in between. LED NEGATIVE connects to ground. It is used to indicate the module state. After powered on, flashing intervals differ in different states.

2, PIO9 is used to control LED indicating paring. It will be steady on when paring is successful.

3, PIO*1, module state switching pin. HIGH -> response to AT command; LOW or floating -> regular work status.

4, With build-in reset circuit, reset is completed automatically after powered on.

Steps to set as master mode:

1, Set PIO*1 HIGH with a *0K resistor in between.

2, Power on, module comes into AT Command Response Status

3, Open HyperTerminal or other serial tool, set the baud rate ****0, 8 data bits, 1 stop bit, no parity bit, no Flow Control

4, Via serial port, send characters "AT + ROLE = 1 r n", if successful, return "OK r n", where r n is carriage return.

*0, Set PIO*1 LOW, re-power, then in Master state, automatically search for slave module and connect.

Application:

Computer and peripheral devices

GPS receiver

Industrial control

MCU projects