Hi!
I've done a bunch of project with lovely HC-05. Recently I bought a pair of them so i expect that they'll be same. I've set one of them and works fine, but I have a difficulty with the second. I can't see it when i scan the Bluetooth devices by my phone. I've tested in another phone too, but my laptop show it. I guess there is a little difference in a configuration of them in somewhere. could you help me?
Use the one that works, throw away the other one, buy a new one if you need two of them. Remember, this is cheap Chinese stuff, don't expect every item to work.
If you really think it's worth debugging the faulty one, provide the complete debugging output of the scans you did on the phone and on the notebook.Ensure that your phone(s) support the serial profile.
Could it be connecting to the "last device" and not releasing?
This suggests there is nothing wrong with Bluetooth. Have you had your phones working with your other Blueteeth?
yes. I guess there is a problem with Device Class. someone here suggested to set it to 00001.
I'm not sure the Bluetooth device is fault. I guess one setting is misleading.
I should go to downtown (very far away) to buy a new and pay some bucks.
Solved! The ID of these two Bluetooths are same so the phone didn't recognize as a new device. It seems I can't use them simultaneously.
Very strange.
Bluetooth Device Address (or BD_ADDR) is a unique 48-bit identifier assigned to each Bluetooth device by the manufacturer.
Bluetooth Address is usually displayed as 6 bytes written in hexadecimal and separated by colons (example - 00:11:22:33:FF:EE).
What does the phone show as the devices bluetooth address?
00:21:04:08:0C:71 exactly same!
This is strange because the address should be unique. I don't know if it can be changed. I would contact the vendor.
The modules from DSD tech are guaranteed and technically supported. You might want to by new modules from them.
http://www.dsdtech-global.com/2017/07/dsd-tech-hc-05-bluetooth-serial-pass.html
There have been some defective clones in recent circulation,
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