Do's and Dont's of USB to Serial Communication between Arduino and Android phone MIT app inventer

Use usb-serial-for-android app to send data from your phone to arduino or any serial device

Setting up OTG communication with MIT app inventor

How to Capture and Save Arduino USB Serial Data

Configure Android serial terminal for SDI-12 sensors

Arduino Android Serial Communication using OTG cable

Android USB Serial Monitor and Plotter

Android + Arduino + USB Host + Simple Analog Input