
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.
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.
16×2 and 20×4 character LCDs (parallel, I2C backpack, Qwiic, Grove), SPI TFTs from 0.71 to 3.5 inches, and large DSI and HDMI capacitive-touch panels up to 13.3 inches.
1.02" E-Ink Display Module - 128x80, Black/White, SPI visual preview
1.02" E-Ink Raw Display Panel - 128x80, Black/White, SPI visual preview
1.54inch e-Paper Module (B), 200×200, 3-Color, SPI visual preview
1.54inch e-Paper Module, 200×200, SPI visual previewWaveshare makes up the large majority of parts here and often sells the same panel twice: once as a raw display needing a separate driver board, and once as a module or HAT+ with the SPI controller attached.
Displays · E-paper displays · 102 parts
"Shake" 8x8 LED Matrix visual preview
10-Segment LED Bar Graph - Red visual preview
11x1 VFD Display Module visual preview
11x7 LED Matrix Breakout visual previewAdafruit HT16K33 backpacks, MAX7219 daisy-chains, NeoPixel and DotStar grids, HUB75 RGB matrix panels, charlieplexed arrays, bare clock displays, and two VFD character modules — almost 90 parts, none wired the same way.
Displays · LED displays · 88 parts
0.49inch OLED Display Module, 64×32, I2C visual preview
0.91" OLED Display Module - 128x32, I2C visual preview
0.96" OLED (B) - SPI/I2C visual preview
0.96" RGB OLED Display Module - 64x128, SPI, 65K Colors visual previewAbout 30 parts: monochrome I2C modules from 0.49 to 1.3 inches, SPI/I2C grayscale and 65K-color RGB panels up to 1.5 inches, a transparent OLED, and ecosystem-specific units for Raspberry Pi, FireBeetle and M5Stack Grove.
Displays · OLED displays · 29 parts
1.75mm PLA (1kg) - Black visual preview
1.75mm PLA (1kg) - Gold visual preview
1.75mm PLA (1kg) - Green visual preview
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Tools & prototyping · 3D printing · 53 parts
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 | Position | Type | Function | Voltage |
|---|---|---|---|---|
| SDA | i2c data | 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 clock | 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 | display interface | 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 | led 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 | user input | 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 | user input | On-board directional keypad button read through the I2C port expander. | ||
| Left button | user input | On-board directional keypad button read through the I2C port expander. | ||
| Right button | user input | On-board directional keypad button read through the I2C port expander. | ||
| Select button | user input | On-board Select keypad button read through the I2C port expander. |
I2C 20x4 Arduino LCD Display Module
20x4 I2C character LCD. Use when the project needs four lines; not a drop-in for a 16x2 enclosure or layout.