AT Command mode is use to change default settings of HC-05 BT module like device name, device role master or slave etc.
This video is to show how to configure AT COMMAND mode for HC-05 BT Module for Arduino.
There are two types of BT Module available in market one with small push button on it and one is without push button both of them are cover in this video.
Complete instruction is available at
AT Command stands for — Attention Command
Link for AT Command list
Link for AT command arduino sketch
Link to buy HC-05 BT module
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