NoticeDifference between revisions of "BT Shield (Master Slave)"
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===States LED=== | ===States LED=== | ||
| + | When power on and disconnect the port, states LED blinks 1time/2s ; | ||
| + | when the module connect and open the serial port, states LED blinks | ||
| + | 2times/s. | ||
==AT command== | ==AT command== | ||
Revision as of 06:16, 22 May 2014
Contents
Overview
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BT shield V2.2 is a serial port Bluetooth module (with master and slave mode) breakout board, it’s compatible with Arduino and IFlat-32, it can directly plug on Arduino/IFlat-32 board, use UART port for communication with Arduino/IFlat-32 or PC.
Specifications
| Microprocessor | CSR BC417 |
| PCB size | 53.3mm X 47mm X 1.6mm |
| Indicators | PWR,State |
| Power supply | 5V DC |
| IO | 6 |
| Communication Protocol | UART/Bluetooth 2.0 |
| RoSH | Yes |
Electrical Characteristics
| Specification | Min | Type | Max | Unit |
| Power Voltage | 4.5 | 5 | 5.5 | VDC |
| Input Voltage VH (Target Voltage = 3.3V) | 3 | 3.3 | 3.6 | VDC |
| Input Voltage VH (Target Voltage = 5V) | 4.5 | 5 | 5.5 | V |
| Input Voltage VL: | -0.3 | 0 | 0.5 | V |
| Current Consumption | - | 20 | 40 | mA |
Hardware
1.jpg)
UART Multiplexer (For free UART connection setting)
You can use the jumper to connect the TXD and RXD pins of HC-05 to D0, D1, D4~D7 pin of Arduino.
2.jpg)
When using the connection as Figure 3, the BT shield connects to the ATMega328 chip on board.
3.jpg)
When using the connection as Figure 4, the HC-05 connects with the FT232RL chip, and the FT232RL connect to PC by USB. Whit this configuration you can use the serial software on PC to control or configure the HC-05 module.
4.jpg)
Except the 2 configurations above, you can connect the TXD and RXD to any other pins from D4-D7, and using the software-serial library to control the HC-05 module.
5.jpg)
Mode Switch
The Mode Set Switch is connected to PIO11, when it is pushed to CMD and powered on, the HC-05 enter command mode, HC-05 module can receive and response AT command in this mode. When it is pushed to DATA and powered on. The HC-05 enters data mode and will not accept AT command.
States LED
When power on and disconnect the port, states LED blinks 1time/2s ; when the module connect and open the serial port, states LED blinks 2times/s.
