I was surprised to find ....
Using my (old) Android tablet. A very nice if not fast Acer. Running older version of Andriod. Too old to surf the web, too slow with today's complex web pages.
I installed this free Android app https://play.google.com/store/apps/d...id.gousb&hl=en
Plugged in an FTDI USB to serial cable.
First try, it worked. No fighting, just worked. 115200 baud.
Then, I plugged in a Teensy 3 running a program I use a lot that I normally plug into my PC and use a serial terminal program (Bray's Terminal).
Amazing.. that Teensy 3 worked with the Android app. Two-way - I can type commands to the program running on the Teensy 3- which monitors the "Serial" USB for incoming ASCII text commands.
That Teensy 3 software is my 900MHz radio "sniffer" - it receives (from a 900MHz RFM69 radio connected to the Teensy), decodes each packet and displays kind of like wire shark (promiscous mode).
I also connected the FTDI USB/Serial so the Android tablet can talk to a non-Teensy ARM M4 board with a 3.3V UART. Works too!
Of course, this will work with other serial over USB devices, and Arduinos and the like with UART text I/O.
So now I have another screen to use for my serial terminal. How easy does it get?