See https://tkkrlab.nl/wiki/Arduino_KY-023_XY-axis_joystick_module
The class (DSG_Ky023) consists of two calibrated axis and one de-bounced button.
The button returns true when pressed.
The axis can return raw or calibrated values. The calibration is done using minimum, zero and maximum for input (raw) and the calibrated output. The output can be reversed - input of 0 could return 127 and input of 1023 could return -128.
Requires DSG_Button and DSG_Gauge libraries.
Classes: DSG_Ky023.
Storage: 32 bytes RAM.