name: I2C_LCD_ADAPTER
description: board to communicate with HD44780-based LCD module over I2C
keywords: display, LCD, I2C
datasheet: https://www.aliexpress.com/item/32984738230.html
# this board uses a PCF8574 I/O expander controlled over I2C. here is it's pinout:
# P0: RS
# P1: RnW
# P2: E
# P3: LED
# P4: D4
# P5: D5
# P6: D6
# P7: D7

pinout:
  LCD:
    LED_K: 1
    LED_A: 2
    DB7: 3
    DB6: 4
    DB5: 5
    DB4: 6
    DB3: 7
    DB2: 8
    DB1: 9
    DB0: 10
    E: 11
    RnW: 12
    RS: 13
    VO: 14
    VDD: 15
    VSS: 16
  I2C:
    GND: 17
    VCC: 18
    SDA: 19
    SCL: 20

properties:
  power: VDD, LED_A, VCC
  ground: VSS, LED_K, GND
  bidir: DB0-DB7, SDA
  in: VO, RS, RnW, E, SCL

schematic:
  symbol: ic
  top: VCC
  bottom: GND
  left: SDA, SCL
  right: LCD

housing:
  pattern: custom
  bodyWidth: 42
  bodyLength: 19

  # LCD pins
  holeDiameter: 1.0
  padDiameter: 1.8
  pitch: 2.54
  rowCount: 1
  columnCount: 16
  rowDX: 0.0
  rowDY: -8.0

  # LCD pins
  holeDiameter1: 1.0
  padDiameter1: 1.8
  pitch1: 2.54
  rowCount1: 4
  columnCount1: 1
  rowDX1: 19.0
  rowDY1: 0.0