Add a small, colourful display to any QT Py or Xiao project with the EYESPI BFF. This compact add-on board connects to EYESPI-compatible displays via an 18-pin 0.5mm pitch FPC connector, giving you a standardised way to wire up SPI displays without a mess of jumper wires.

The EYESPI standard is like STEMMA QT for displays — a consistent connector and pinout across a range of TFT and E-Ink breakouts. Look for the EYESPI logo on the back of compatible displays.

Pin Mapping

• MOSI / MISO / SCK – Connected to the default SPI port on the QT Py
• SDA / SCL – Connected to the I2C port on the QT Py headers (note: some boards have a separate QT Py I2C port on a different bus)
• TFT CS – TX pin (reconfigurable via solder jumper)
• TFT DC – RX pin (reconfigurable via solder jumper)

Optional Pins (Configurable via Solder Jumpers)

• IRQ on A0 – Used by displays with touchscreens
• Touch CS on A1 – For displays with resistive touchscreens
• Memory CS on A2 – Used by E-Ink displays with separate SRAM chips
• SD Card CS on A3 – For display breakouts with SD card sockets

Two additional through-hole solder pads are provided for Backlight Control and Display Reset, which can be wired with jumper wires if needed. Most displays default these to on, so they're typically optional.

Key Features

• 18-Pin EYESPI FPC Connector – Standardised display connection with flip-top connector
• QT Py / Xiao Form Factor – Compact BFF (Board Friend Format) design
• Configurable Pin Mapping – Solder jumpers to reassign or disable CS, DC, IRQ, Touch, Memory, and SD pins
• TFT & E-Ink Compatible – Works with any EYESPI-equipped display breakout

Ideal For

• Adding colour TFT or E-Ink displays to QT Py projects
• Compact display-driven interfaces and dashboards
• Wearable or space-constrained builds needing a visual output

Package Contents

• 1× Assembled and tested EYESPI BFF PCB
• 1× Header set