Use APKPure App
Get USB Serial Monitor old version APK for Android
Connect to USB-Serial devices and send/receive serial data.
For the hobbyist, connect to USB-Serial devices and send/monitor serial data. Connect to devices containing USB-Serial chips such as FTDI, Mega16u2, CH340, CP210x and PL230x.
Adjust connection settings such as baud rate, data bits, polarity and stop bits.
ASCII and Hex display formats.
Save data to file.
6 Memory buttons for send strings.
Option to enter data as Hexadecimal.
Results screen to show technical details of connected USB devices.
In app user guide.
Send up to 256 characters at a time. Monitor will display up to 10000 lines.