How do you use Serial (115200 baud rate)?

MIT App Inventor Help
1

Hi Guys!!! how to use Serial (115200 baud rate) (read as strings using "\n") and put an button on screen on runtime
please help

2

9600 baud is more realistic and is a common default.

3

Im on ESP32

4

There are a number of ESP32 Guides by Power User Juan:

https://community-appinventor-mit-edu.ezproxy.canberra.edu.au/search?q=ESP32%20%23tutorials-and-guides