Turning LED on by Buttons on App via Bluno Nano

BlunoLEDTest.ino (4.0 KB)
BlunoTest (1).aia (3.0 MB)

Hi, I am trying to control the LED of Bluno Nano through an App. The app connects with the bluno and receives the values from the serial monitor. However, when I press the button on the app to turn LED on/off, the bluno does not recieve any command. Any suggestions are appreciated to solve this issue.
I am attaching the blocks, arduino code and .aia files. Many thanks!