adafruit 2.8″ capacitive tft screen

Today’s review is on the small TFT touchscreen for the Raspberry Pi computer. At $45, it’s not the cheapest screen you could add onto a single-board computer but the capacitive touchscreen and the four accompanying tactile pushbuttons along the side make it worth the extra money, especially if you’re adding it to a 3D printer for the sake of control.

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TFT

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Installation

As usual, the Adafruit documentation was more than adequate to get this done. They provide an installation script which makes the process easy.

Observations

The touchscreen works wonderfully, much better than the typical/cheaper resistive TFT that we’re most familiar with.

I’ll need to determine which GPIO pins those four pushbuttons go to. It will be nice to use those in some sort of interface.

I reviewed both the OctoPrint-TFT and TouchUI interfaces for OctoPrint on this. I’m not convinced that either are a perfect fit, given the size of the screen. Both required the Desktop to be installed on Raspbian. In the case of TouchUI, it required the use of a local browser on the Pi (Chromium) but I was able to get this to go into the full screen mode.

Other than as a control interface for a 3D printer, I’m not quite sure what projects would be a good fit for this. The timelapse rail kit would be good for this setup, perhaps. It’s a little bulky for a cryptocurrency cold wallet. It would probably make a good streaming music player, given the positioning of those buttons.

Adafruit makes some very attractive enclosures for this, unfortunately they’re out of stock at the moment.

  • Size: 2.8″ (board matches form factor of Raspberry Pi 3B)
  • Screen dimensions: 50mm x 69mm
  • PCB dimensions: 56mm x 85mm
  • Brand: Adafruit
  • Model: 2423
  • Name: PiTFT Plus 320×240 2.8″ TFT + Capacitive Touchscreen
  • Cost: $45
  • Resolution: 320×240
  • Touchscreen type: capacitive
  • Feature: extra 40-pin header underneath board
  • Feature: four tactile pushbuttons

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