Contrlling RGBLEDs connected to BBC microbit V2 with Mit App Inventor

[Ghica]

Maybe I should have givne a bit more explanation. I have a tutorial about communicating with a microbit:

App Inventor, Micro:bit and UART

App Inventor, Micro:bit and UART Somehow, communicating with a micro:bit via UART is more difficult than it should be. For now, using the extensions as indicated in this tutorial, will ensure that everything works. This tutorial is intended to show how to use Bluetooth Low Energy (BLE) to send messages to a micro:bit. This can be used to control a toy robot car or any device that uses a micro:bit as its brain. This first part will only cover the basic communication with a micro:bit via BLE. A…

And the link to the internet of things tutorial I gave earlier (The Internet of Things: Data Acquisition and Analysis) has a more gentle explanation.
Except for the BLE extension mentioned in the Internet of things tutorial, you should use this one edu.mit.appinventor.ble-20230223-beta.aix (200.0 KB) mentioned in my tutorial, to get the proper Android permissions.

At this moment you cannot address the IO-pins of the microbit directly from App Inventor, as I said. So, what you should do instead is send a command to the microbit via the serial interface UART, the microbit recieves this command and activates the IO-pins, using MakeCode. All explained very well in the IOT tutorials.
The last example in these tutorials is about watering plants, I think also do via the IO pins, so that should help you.