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This Bluetooth shield is a serial port Bluetooth module (Slave) breakout board, and it compatible with Arduino, you can directly plug in with Arduino and use the UART port for Bluetooth communication. The BT shield v1.1just can communicate with Arduino board, and it’s inconvenient to change its setting by AT command through USB. Now the new board has a switcher, you can change the module connection, so when you put the switcher to the “To Board” side, it can control by Arduino or IFLAT32, but to “To FT232” side, it connect to the FT232D IC. you can use the Arduino IDE or other serial monitor software to send it the AT command. About the AT command , you can find more detailed information here.| Pad | Name | Type | Description | |
| RX/TX | I/O | UART communication Port (Depend on switcher 4) | ||
| TX/RX | I/O | UART communication Port (Depend on switcher 4) | ||
| State | O | State Direction | ||
| Switcher | Name | Description | ||
| 4 | UART Communication Switch Connect to broad or FT232 | |||
| 5 | Communication | Voltage | Switch | Set the interface voltage |
| LED | Name | Description | ||
| 6 | PWR | When power on, the PWR LED light | ||
| 7 | State | \"When the module in standby mode, the State LED will alternating light off. When the serial port open, the State LED light.\" |
bron:
https://www.itead.cc/wiki/BT_Shield_(Slave)
http://store.iteadstudio.com/index.php?main_page=product_info&products_id=307
https://www.itead.cc/blog/make-arduino-talk-with-android-by-bluetooth
http://www.robotshop.com/forum/itead-studio-bt-shield-v2-1-t10839
http://forum.arduino.cc/index.php?topic=90048.0
https://www.itead.cc/blog/make-arduino-talk-with-android-by-bluetooth