LiquidCrystal_I2C
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Licence query
I cannot see any licence details attached to this library. Could you please confirm which licence covers the library?
The history of this library goes back quite a ways, it is derivative of this library: https://hmario.home.xs4all.nl/arduino/LiquidCrystal_I2C/
which is a derivative of the Arduino LiquidCrystal library which is licensed LGPL 2.1+ (where the "+" means, or newer).
So this library must be licensed as LGPL 2.1+