If you type in AT & click on SEND button you should get an OK confirmation from the HC05 module. The HC05 module enters the Command mode with Baud Rate 38400.Įnsure to select “BOTH NL & CR” & Baud Rate as 38400 at the bottom of the serial monitor.This is very important as the Bluetooth module HC05 expects both Carriage Return and Line Feed after every AT command. Now provide the USB cable power to Arduino. Rx(pin0 ) -> Rx Remember it is one to one connection here & not cross connection This bypasses the Boot loader of UNO & the Arduino is used as USB-UART converter.Īfter uploading this empty sketch,remove USB power from Arduino & do the following connections with HC05 Slave : To configure the SLAVE we make use of an Arduino UNO board.Not much of configuration needed for slave.We can leave it to defaults.But to know the ADDRESS of the slave you’ve to follow this procedure.īefore connecting the HC05 module, upload an empty sketch to Arduino. It is quite simple to pair a Bluetooth module from your Android phone.But bit tricky to pair it with another HC-05 module.In this post I’ll describe the method of pairing 2 BT modules.One of the module is assigned ROLE as MASTER & the other left as SLAVE.īy default all HC05 modules are SLAVEs.Using AT commands the module can be configured as we like.
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