Problem with Bluetooth connection

Lasycat

Hello! Do you know how to solve this problem?I can’t change the name of ecu and password. That’s why I can’t connect with ecu via Bluetooth .
https://streamable.com/lir5pw

JHM

Bluetooth pin and name are applied after ECU reboot.
You can't add device if it is already paired.

So, to make it work, you have to:

set name and pin
disconnect and turn off ecu
delete paired device from windows
turn on ecu and pair again

Lasycat

I tried this method several times, but all without success. the name and pin are successfully changed in the commander after a restart, but when searching for bluetooth, the old name and password appear, which I don’t remember. I suspect that the problem is in the bluetooth module.

JHM

Lasycat
are you sure that ECU is powered off?
I figured out that bluetooth software has some kind of name cache. Whan you change name of BT module, and search for it immediately after, it can appear with old name.

Lasycat

Yes, I even tried to unplug the ecu from the plug for a while. for about half an hour

JHM

Try this:

change pin to 1234 and save, wait 10sec after saving
turn off, wait 10sec
turn on, wait until ECU is connectable
repeat 2-3 one more time

Lasycat

I tried this method several times, but the name and pin code change only in the application. when searching through bluetooth, the old name of the inventory block is still determined. to which not to connect

JHM

The last option is to replace HC06 module

Lasycat

Can I buy any hc-06 module and solder it myself? Or does it need to be programmed before installation?

JHM

Lasycat
ECU programs HC06 when PIN is changed.
Although, it is safer to program it yourself before installing, to verify it's working.

Lasycat

JHM Hello! What speed should be programmed before soldering the new hc-06

JHM

19200

Lasycat

The problem is solved by changing hc-06 module. Thanks you for support