Catalog > Internet of Things (IOT) Related Products > More Platforms Bluetooth Master/Slave Module CSR Bluetooth Serial Master/Slave Module ACM BLUETOOTH MODULE MAST/SLAVE CSR BLUETOOTH SERIAL MODULE MASTER/SLAVE V2.0 PROTOCOL--9600 BAUD-- BC04-B (COMMS COMPATIBLE WITH LC-05, HC-05) Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview This is a master and slave in one module, switch by using AT commands.This module also includes the base board, not only the core board, most functions are pre-set, so only the serial port communication is available but it’s more easy to use.Communication compatible with other similar Bluetooth serial module: LC-05, HC-05 Features Based on bluetooth module BC04-B.Use CSR popular buletooth chip, bluetooth V2.0 Protocol standard.Serial port operation voltage 3.3VCustomize by AT commands for: baudrate, memory mode, module name, master/slaveBaud rate set at 9600, customization is possible.Operation current, pairing at 30MA, after pairing is 8 MA during communicationsleep mode current: no sleep modeWidely use for wireless data communication such as GPS navigation device, remote data collection, PDA devicesAlso can pair and communicate with laptop, laptop bluetooth adapter, PDA devicesBe aware default setting of the product is slave mode, communication only available between master and slave mode, but not master and master, or slave and slave mode.Board silk pring RXD means you need to the connect the RXD port of another device, and same for TXD port.R2 version add software and hardware master/slave mode select, default is software on. To use hardware select, need cut off connection on software ON with middle pin first.