![Serial connection error: java.lang.NoClassDefFoundError: android.hardware. usb.UsbManager - #4 by Taifun - MIT App Inventor Help - MIT App Inventor Community Serial connection error: java.lang.NoClassDefFoundError: android.hardware. usb.UsbManager - #4 by Taifun - MIT App Inventor Help - MIT App Inventor Community](https://community.appinventor.mit.edu/uploads/default/original/3X/f/1/f1dea2c074d842bc3085f7987718789583708553.jpeg)
Serial connection error: java.lang.NoClassDefFoundError: android.hardware. usb.UsbManager - #4 by Taifun - MIT App Inventor Help - MIT App Inventor Community
GitHub - ILT-HSR/usb-serial-for-android: Fork of "https://github.com/mik3y/ usb-serial-for-android" - Java driver library for communication with Arduinos and other USB serial hardware on Android
GitHub - flyskywhy/react-native-usb-serialport: High performance JAVA native gateway passthrough between multi usb serial port and multi socket without JS bridge, or just use multi usb serial port or socket alone
![Serial OTG. Arduino CH340. FTDI. rkl099's Extension - Tutorials and Guides - MIT App Inventor Community Serial OTG. Arduino CH340. FTDI. rkl099's Extension - Tutorials and Guides - MIT App Inventor Community](https://community.appinventor.mit.edu/uploads/default/original/3X/1/c/1c5901f021c531ebb54d1b92b42a0c0d42229a95.jpeg)