Error when connecting bluetooth to arduino HC-06

[IRATI_ODRIOZOLA_ZABA]

Hello, I'm creating an app that's supposed to send a message to Arduino via Bluetooth but, for some reason, it has stopped working and I can't fix it. When I try to connect the Bluetooth I get a message with an error saying that the MAC address is not valid. I've seen that other users have also had this problem but I haven't been able to find a solution.

Thanks.

[ABG]

That ':' in your text JOIN will never appear between the two parts of the text JOIN on the left side of the equals test so nothing will be sent.

[IRATI_ODRIOZOLA_ZABA]

But that part DOES work. My problem is with the Bluetooth.

[ABG]

Compare the way you load your list Pickers with one of the standard samples.

Search for FAQ Bluetooth Starter

[ABG]

Also see Bluetooth connectivity issue: Mobile screen goes black when searching for BT devices - #23 by rghmr_tic

[ABG]

I have seen other samples use Elements instead of ElementsFromString here.
Turning a list into text and back is a needless complication.

[IRATI_ODRIOZOLA_ZABA]

I changed it to Elements and it works, thank you very much.