I am a beginner to arduino and trying to follow one of the videos from youtube to make a project- Master And Slave using HC-05 modules. I followed every step from that video carefully. Here's the link to the video -> https://www.youtube.com/watch?v=BXXAcFOTnBo For Slave Module when I type AT commands in the serial monitor nothing shows up. I searched in Internet for the this problem and still didn't fix it. Here's What i have done:
tired restarting my pc tried Changing arduino, At first i used arduino nano and then uno I tried changing the baud rate to all other values and nothing happened And there is no change in light blink, it stays on AT command mode until power is turned off and on again.
Thank You For the Answer
Not responding to
AT
commands is common with clonedHC-05
modules. The biggest reason for this is that theENABLED
pin is not plugged in. Right next to theVCC
pin, there is a pin calledKEY
that should be idle. When you feed that pin with 3.3V, you will see that you get a response to theAT
commands. If you don't get any response, don't forget to press the button on the BT Module after making the connection. If that doesn't work, be sure to remove the EN pin and press the button again. You should try these ways until you get a response from the AT command. Every time you writeAT
on the serial port screen, the bluetooth module will also respond to these requests with the led on it.