Grove - 0.54" Red Dual Alphanumeric Display

The Grove – 0.54" Red Dual Alphanumeric Display is a 2-digit module that uses 14-segment LEDs to display full alphanumeric characters, not just numbers. Unlike standard 7-segment displays, it can render all letters and digits, making it ideal for more expressive outputs.

Each digit is 0.54" high and uses red LEDs with a brightness of 30mcd, clearly visible from several metres away. The module includes the HT16K33 LED controller, which simplifies wiring by enabling I2C communication. Only four connections are needed—VCC, GND, SDA, and SCL—reducing the I/O pin usage compared to traditional 14-segment wiring.

It runs at 3.3V or 5V and connects easily via the Grove I2C interface. The module is compatible with various platforms including Arduino and Seeeduino. If using multiple displays, external power (VCC and GND) should be provided separately, with SDA, SCL, and GND lines shared with the microcontroller.

Features

• 2-digit 14-segment alphanumeric display
• Displays full letters and numbers
• Red LED with ultra-high brightness (30mcd)
• Digit height: 0.54 inch
• Grove I2C interface – uses only two I/O pins
• Onboard HT16K33 LED controller
• Supports 3.3V and 5V supply voltage
• Easy plug-and-play connection, no soldering required
• Selectable I2C address (default 0x70)
• Operating temperature: -30°C to 85°C
• Module size: 40 × 40 mm
• External power is required when using multiple displays

Specifications

Supply voltage	3.3V / 5V
Operating ambient temperature	-30°C to 85°C
LED display	JM-S05422AH-001
LED controller driver	HT16K33
LED colour	Red
Ultra-high brightness	30mcd
LED height	0.54"
LED segments	14
Dimensions	40 × 40mm
Output interface	I2C
I2C address (selectable)	0x70 (default)

Resources

• Product Wiki
• Library
• Schematic
• LED Module Datasheet
• HT16K33 Datasheet
• MPS MP2155 Datasheet
• Part number: Seeed 104020132

Package Contents

• 1x Grove - 0.54" Red Dual Alphanumeric Display