Raspberry Pi HAT kit with a 16x2 RGB backlight character LCD and 5-button keypad, all controlled over I2C using only 2 GPIO pins. Frees up remaining GPIO for other I2C peripherals sharing the bus.
Raspberry Pi I2C data line used by the Pi Plate; Adafruit states the plate uses the Pi I2C SDA/SCL pins and the CircuitPython example constructs I2C with board.SCL and board.SDA.
Raspberry Pi I2C clock line used by the Pi Plate; Adafruit states the LCD, RGB backlight, and keypad are controlled through the two I2C pins.
On-board 16x2 character LCD controlled through the Pi Plate I2C port-expander path; the product page describes controlling the LCD through the two I2C pins.
Three backlight colour control channels handled by the Pi Plate; Adafruit states up to 3 backlight pins are controlled using only the two I2C pins on the Raspberry Pi.
On-board directional keypad button read through the I2C port expander; Adafruit states the kit provides four directional buttons plus Select without extra Raspberry Pi GPIO pins.
On-board directional keypad button read through the I2C port expander.
On-board directional keypad button read through the I2C port expander.
On-board directional keypad button read through the I2C port expander.
On-board Select keypad button read through the I2C port expander.
| Pin | Type | Function |
|---|---|---|
| SDA | I2C | Raspberry Pi I2C data line used by the Pi Plate; Adafruit states the plate uses the Pi I2C SDA/SCL pins and the CircuitPython example constructs I2C with board.SCL and board.SDA. |
| SCL | I2C | Raspberry Pi I2C clock line used by the Pi Plate; Adafruit states the LCD, RGB backlight, and keypad are controlled through the two I2C pins. |
| LCD 16x2 character display | Unknown | On-board 16x2 character LCD controlled through the Pi Plate I2C port-expander path; the product page describes controlling the LCD through the two I2C pins. |
| RGB backlight control | Control | Three backlight colour control channels handled by the Pi Plate; Adafruit states up to 3 backlight pins are controlled using only the two I2C pins on the Raspberry Pi. |
| Up button | Unknown | On-board directional keypad button read through the I2C port expander; Adafruit states the kit provides four directional buttons plus Select without extra Raspberry Pi GPIO pins. |
| Down button | Unknown | On-board directional keypad button read through the I2C port expander. |
| Left button | Unknown | On-board directional keypad button read through the I2C port expander. |
| Right button | Unknown | On-board directional keypad button read through the I2C port expander. |
| Select button | Unknown | On-board Select keypad button read through the I2C port expander. |
Raspberry Pi I2C data line used by the Pi Plate; Adafruit states the plate uses the Pi I2C SDA/SCL pins and the CircuitPython example constructs I2C with board.SCL and board.SDA.
Raspberry Pi I2C clock line used by the Pi Plate; Adafruit states the LCD, RGB backlight, and keypad are controlled through the two I2C pins.
On-board 16x2 character LCD controlled through the Pi Plate I2C port-expander path; the product page describes controlling the LCD through the two I2C pins.
Three backlight colour control channels handled by the Pi Plate; Adafruit states up to 3 backlight pins are controlled using only the two I2C pins on the Raspberry Pi.
On-board directional keypad button read through the I2C port expander; Adafruit states the kit provides four directional buttons plus Select without extra Raspberry Pi GPIO pins.
On-board directional keypad button read through the I2C port expander.
On-board directional keypad button read through the I2C port expander.
On-board directional keypad button read through the I2C port expander.
On-board Select keypad button read through the I2C port expander.
SPI · I2C · 3.3 V · 3.3 – 5 V · Breakout
Adafruit describes product 398 as a 16x2 RGB backlight LCD using digital pins for LCD control and PWM pins for the backlight; the product…
Module pins: SDA, SCL. Schematik maps them to your board in the app.
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