App Inventor 2 BLE, Sending and receiving strings

Tutorials and Guides Internet of Things
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Hi,

I am trying to read strings from my Arduino, I am sending sensor values as strings.
I have followed the tutorials and everything was so for so good until I could not read strings.
I think the problem is at service UUID and char. UUID, the functions provided in stringsReceived did not work for me and I did the following (still not working :frowning: )

Unbenannt
Unbenannt612×463 52.8 KB

Do you have any suggestions?
Thanks in advance.

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Please see the examples at Multiple Bluetooth connection in one screen

Though you only have one connection, the ideas are the same.