finally! I wasn't getting any response to my AT commands then I plugged in the Bluetooth module after starting the Arduino. It worked.

ive been waiting for this my whole life... THANK YOU!!!!!!

The best Arduino Bluetooth video I have watched so far... I'm about to troll your channel fo some more gems!!!😁

Thanks Paul!

Thanks for the video. I thought this module has 3.3V logic levels and the arduino IO is at 5V so you need to use a voltage divider on the TX RX lines? It's been ages since i used it so thats why i'm here. thanks for the refresher.

After setting up baudrate.can I now use 0 and 1 for rx and TX or I have to use 10 and 11 for rx and TX for my upcoming projects. Pl help

is it aright to connect RXD directly to arduino port? the port provides 5V meanwhile the RXD on the module says LEVEL: 3.3V

I cant detect my module with my pc? Not showing up on windows BT

🆒 Thank you so much for uploading this video. 👍👍👍👍👍 What's meant by level 3.3V at the back of the module?

sir i was getting an error:[o] if i give the commands other than AT could u plz tell me the solution for this ?!

Hi, did you face any delay in receiving signals to the hc05. I am getting delayed signals and at time it jams. What can be the issue?

THANK YOU VERY FUCKING MUCH I LOVE YOU

I'm not sure what I'm doing wrong here, but I'm just not receiving any responses from the Serial Monitor. The code compiles and uploads, the HC-05 is blinking, so it's at least receiving power. I have set the Serial Monitor to the correct baud rate. One thing worth noting is when I compile, I have verbose on, and it includes a message saying *Overriding Baud Rate : 115200.* Could this be the issue? Edit: For some reason there are also a bunch of missing character squares and backwards question marks at the beginning of the lines where it asks for AT commands in the Serial Monitor. Edit 2: I got it working by pulling Arduino power, pressing and holding the small button on the HC-05, and *while still holding the button*, plugging Arduino power back in. It now responds to commands as I would expect.

Hello Paul, thanks for video. Though I am sending AT command, but there is no reaction. No reaction at all. Can't understand the reason. BT module seems to operate normally. Why it can be happening?

I do exactly as said in the video, as well as holding the little button on the HC-05 module while powering up the arduino and releasing it after to get it in the AT state. I end up getting an OK response the the single AT command, but when I put another command such as AT+ADDR I get the error message "ERROR: [0]". Anyone who can help?

So I am working on a school project and have the exact board you got at 0:35 except we put another board on top that has pins that slide onto both sides of the bottom board. I’m not sure what we placed on top but there are 12 pins with Bluetooth written next to them and I’m trying to figure out what I need to get to plug into it. Any help or suggestions would be appreciated EDIT: the board we placed on top was a FunduMoto L298P Motor Driver Shield. It apparently has two bluetooth connections so I guess 6 pins for each connector. Cant find anything to attach to get the Bluetooth

For fixing the error you have to remove the jumper wire at the left/right most wire. I will work 👍

It just says empty squares and it wont answer me it doesnt say anything but empty squares

Just not working, keep getting error (0), can't find a solution to the problem.

any idea how i fix this error? when it try to flash it just stops here. ive been at it for several hours and im about to give up avrdude: stk500v2_getsync(): timeout communicating with programmer

I have a version 4.0 and cant get it to work. No datasheet available. Any suggestions,

You can connect multiple HC-05s with ukposts.info/have/v-deo/oX12oWmIqYZkmIU.html

It is unfortunate that those libraries hide so much from you. Sending text to a slave would be handy.

I did everything that was on this video and I can't enter any commands, this is getting old.

AT ERROR ?? WHAT ?HELP . OH MY SHOST. HELP MY.