0.85″ IPS LCD Mechanical ScreenKey White - Waveshare 34167

Description

The programmable mechanical key 0.85inch ScreenKey Module W from Waveshare is a complete module combining a color IPS LCD display, a mechanical switch, and a PCB. The display features a 0.85″ diagonal, 128 × 128px resolution, and 65K colors. Its ST7735 controller communicates through SPI, allowing custom icons, symbols, and status information to be displayed directly on the key.

The module features a white keycap with a mechanical switch providing tactile feedback. The actuation force is 50 ± 10gf, the actuation travel is 1.20 ± 0.30mm, and the total travel is 2.80 ± 0.25mm. The manufacturer specifies a lifespan of 50 million presses. The display surface is protected by 2.5D tempered glass with rounded edges.

Display communication uses a 4-wire SPI interface, while the mechanical key state is available through a separate KEY signal. The PCB features a 9-pin connection interface, including PWM backlight control. Waveshare provides development resources for Raspberry Pi, Arduino, ESP32, RP2040, and STM32. The module can be used in HMI panels, programmable keyboards, multimedia controllers, and automation equipment.

The offered Waveshare 34167 version includes a white display keycap, mechanical switch, and PCB module. A 200mm MX1.25 9-pin cable is also supplied for connecting the module to a compatible controller.

Features

• Display
  • Technology: IPS LCD
  • Diagonal size: 0.85″
  • Resolution: 128 × 128px
  • Display colors: 65K (65,536)
  • Display controller: ST7735
  • Active display area: 15.21 × 15.21mm
  • Pixel size: 118.8 × 118.8µm
  • Backlight: LED, PWM control
  • Protective surface: 2.5D tempered glass
• Mechanical switch
  • Switch type: momentary
  • Actuation force: 50 ± 10gf
  • Actuation travel: 1.20 ± 0.30mm
  • Bottoming force: 55 ± 10gf
  • Total travel: 2.80 ± 0.25mm
  • Spring length: 15.50mm
  • Lifespan: 50 million presses
• Communication and connectors
  • Display interface: 4-wire SPI
  • Signal connector: 9-pin
  • Signals: KEY, DC, CS, SCLK, DIN, GND, VCC, PWM, RST
  • Dedicated KEY signal for switch state detection
  • PWM backlight control
  • MX1.25 9-pin cable, 200mm length
• Power supply
  • Operating voltage listed in module documentation: 3.3V / 5V
  • VCC power input on the signal connector: 3.3V
• Mechanical specifications
  • Keycap color: white
  • Version: display, mechanical switch, and PCB module
• Additional information
  • Part Number: 0.85inch ScreenKey Module W
  • Manufacturer SKU: 34167
  • Platforms covered by documentation: Raspberry Pi, Arduino, ESP32, RP2040, STM32

Kit includes

• 0.85inch ScreenKey Module W – 1 pc.
• MX1.25 9-pin cable, 200mm – 1 pc.