ESP32 based encoder display
- uses 5 x MAX7219 as 8 digit 7-segment display driver
- supports floating point values
- uses MCP23017 as I2C port expander to scan a 4x4 numpad
- uses MCP23017 as I2C port expander for 8 switches/LED
- supports 2 encoder inputs
- works together with encInterface
- GPIO 23 - MOSI
- GPIO 18 - CLK
- GPIO 4,5,13,14,25 - CS
- GPIO 16 - RX
- GPIO 17 - TX
- GPIO 21 - SDA
- GPIO 22 - SCL
- GPIO 26 - INT Port A
- GPIO 27 - INT Port B
- GPIO 32 - 1 Switch
- GPIO 33 - 1 A
- GPIO 34 - 1 B
- GPIO 35 - 2 Switch
- GPIO 36 - 2 A
- GPIO 39 - 2 B