There are modules that can be soldered or stacked to the display. Backlight, scroll, cursor and entrymode control. Web the pcf8574 is a common, and slightly unusual i2c expander for folks who are used to the mcp230xx series:
PCF8574 I2C I/O Expansion Module ProtoSupplies
// set the pins on the i2c chip used for lcd connections:
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Web a library for driving liquidcrystal displays (lcd) by using the i2c bus and an pcf8574 i2c adapter. Web pcf8574_lcd = & h4c 'the slave address of the second pcf8574. Web // set the lcd address to 0x3f for pcf8574at with a0,a1,a0 address line open, default setting.
This Allows Eight Of The Pcf8574 And Eight Of The.
Web 3.3v and 5v compatible. As shipped, these jumpers are all set to the. A library for driving liquidcrystal displays (lcd) by using the i2c bus and an pcf8574 i2c adapter.
See Design Schematic For More Details.
Web pcf8574 outputs are directly connected to lcd lines in the following way: This library uses the original wire library for. If you need more pins here you can find the.
Library To Support The Hd44780 Lcd I2C Driven By The Pcf8574 Controller.
