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WSAL18628 – 2.8inch DPI LCD/en

Aus JW Tech Wiki

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

A 2.8-inch display with an IPS panel, capacitive touch (5-point), DPI connection, and a toughened glass cover for Raspberry Pi.

Related products at JW Tech

Technical overview

  • Resolution: 480 × 640 pixels
  • Connection: 40-pin GPIO of the Raspberry Pi via the DPI interface
  • Refresh rates up to 60 Hz
  • Capacitive touchscreen over I²C; 5-point touch
  • Toughened glass cover with hardness up to 6H
  • Low power consumption: approx. 5 V / 160 mA
  • Supported operating systems: Raspberry Pi OS Bookworm, Bullseye, Buster, Ubuntu
  • Software setup via config.txt or cmdline.txt depending on the system version
  • Display and touch rotation can be set synchronously (Bookworm) or separately
  • Do not extend the connection distance beyond 10 cm – use HDMI/MIPI DSI/LVDS for longer distances

Commands and examples – verify before use:  

dtoverlay=vc4-kms-v3d
dtoverlay=waveshare-28dpi-3b-4b
dtoverlay=waveshare-28dpi-3b
dtoverlay=waveshare-28dpi-4b
dtoverlay=waveshare-touch-28dpi
dtoverlay=vc4-kms-dpi-2inch8
gpio=0-9=a2
gpio=12-17=a2
gpio=20-25=a2
dtoverlay=dpi24
enable_dpi_lcd=1
display_default_lcd=1
extra_transpose_buffer=2
dpi_group=2
dpi_mode=87
dpi_output_format=0x7F216
hdmi_timings=480 0 26 16 10 640 0 25 10 15 0 0 0 60 0 32000000 1
dtoverlay=waveshare-28dpi-3b-4b
dtoverlay=waveshare-28dpi-3b
dtoverlay=waveshare-28dpi-4b
video=DPI-1:480x640M@60,rotate=90
video=DPI-1:480x640M@60,rotate=180
video=DPI-1:480x640M@60,rotate=270
display_rotate=1 #1: 90; 2: 180; 3: 270
ENV{ID_INPUT_TOUCHSCREEN}=="1", ENV{LIBINPUT_CALIBRATION_MATRIX}="0 -1 1 1 0 0"
Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"

Notes and version constraints

  • The exact DTBO files must be downloaded from Waveshare and copied into /boot/overlays/; the source text does not include a direct download URL.
  • When using both DPI and HDMI simultaneously, they share the same rotation value – separate rotation is not possible.
  • For older systems (Stretch/Jessie), display_rotate must be set in config.txt; this method does not work on newer KMS-based systems.
  • Touch calibration matrices are version-sensitive; incorrect values lead to inconsistent touch orientation.
  • Extending the cable beyond 10 cm may cause signal interference; alternative interfaces such as HDMI or MIPI DSI are recommended.

Source and revision record

  • 2.8inch DPI LCD - Waveshare Wiki
  • Source revision: 109983
  • Captured: 2026-09-01T03:35:16+00:00
  • SHA-256: 55d04d20dca721bae1577b84e862f1d3565a71acee0876f8bda12afed8005bc0
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