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Small rectangular e-paper module with 91 black and white segments on a 1.9 inch screen

WaveShare

WaveShare 1.9inch Segment E-Paper Display 91 Segments Black/White I2C

SKU CH-9SFM-YTNG1

A 1.9-inch segment e-paper module with 91 segments, I2C control, partial refresh in .3 s, and 3.3 V or 5 V operation for Arduino, Raspberry Pi or STM32 projects

  • 9 inch display with 91 segments for clear readings
  • Paper-like visibility without backlight in any light
  • Ultra-low power draw only during refresh cycles
  • Partial refresh in .3 seconds for quick updates
  • I2C interface works with 3.3 V and 5 V boards

1.9inch Segment E-Paper for Meters

This 1.9inch segment e-paper module shows black and white digits across 91 segments. It targets hobbyists and engineers building temperature, humidity or digital readout devices. The I2C bus simplifies wiring to popular controller boards such as Raspberry Pi, Arduino or STM32.

91-Segment Layout Drives Readout Design

The display provides exactly 91 individually addressable segments, which determines how many digits, icons or decimal points can appear simultaneously. Buyers who need alphanumeric text, graphics or more than 91 segments must choose a dot-matrix e-paper instead.

Driver Resources Accelerate Prototyping

The package includes schematic diagrams and example code for Raspberry Pi, Arduino and STM32 platforms. These resources let developers integrate the display without writing low-level drivers from scratch, reducing bring-up time for meter projects.

How it compares

Measured against everything we stock in Display Modules & Optical Components, at today’s prices. Recalculated every night.

Price $27.99
Cheaper than about 76% of the 78 comparable items (median $39.49).

Specifications

Processor
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Questions about this item

How does the 1.9-inch size translate when the 91-segment display is mounted in a real device?

The 1.9-inch module provides a compact read-out area that fits small enclosures such as temperature or humidity meters while showing all 91 segments clearly.

What does the I2C bus limit in practice for this e-paper module?

The I2C interface caps the update speed to a 0.3 s partial refresh and 2 s full refresh, which is typical for low-power segment displays.

What voltage supply and mounting holes does the board need to fit a 3.3 V or 5 V controller?

The onboard MOS level-shifter accepts 3.3 V or 5 V logic, and the PCB includes standard mounting holes for direct attachment to Arduino, Raspberry Pi or STM32 boards.

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