Wio Terminal (D51R)

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Internal Reference: SS-007

Wio terminal (D51R)

Introducing the Wio Terminal (D51R); the perfect solution for any hobbyist looking for a flexible and powerful all-in-one device to explore the Internet of Things projects! The Wio terminal is for all the hobbyists out there looking to explore and develop something new, Wio Terminal has the capability to handle Arduino, CircuitPython, micropython, ArduPy, AT Firmware – Visual Studio Code, and is Azure Certified too! Wio Terminal is an ATSAMD51-based microcontroller with both Bluetooth and Wi-Fi Wireless connectivity powered by Realtek RTL8720DN, compatible with Arduino and MicroPython. Currently, wireless connectivity is only supported by Arduino. More than just a single embedded functional module, Wio Terminal itself is integrated with a 2.4” LCD Screen, onboard IMU(LIS3DHTR), microphone, buzzer, microSD card slot, light sensor, infrared emitter(IR 940nm).On top of that, it also has two multifunctional Grove ports for Grove Ecosystem and 40 Raspberry Pi compatible pin GPIO for more add-ons. All of these practical add-ons are carefully housed in a compact enclosure, making it an efficient and product-ready product. Equipped with Raspberry Pi 40-pin GPIO, it can be mounted to a Raspberry Pi as a slave device.

Key Features

  • Powerful MCU: Microchip ATSAMD51P19 with ARM Cortex-M4F core running at 120MHz
  • Reliable Wireless Connectivity: Equipped with Realtek RTL8720DN, dual-band 2.4Ghz / 5Ghz Wi-Fi
  • Complete system equipped with Screen + Development Board + Input/Output Interface + Enclosure
  • Highly Integrated Design: 2.4” LCD Screen, MCU, IMU, WIFI, BT, and more practical add-ons housed in a compact enclosure with built-in magnets & mounting holes allow you to easily set up your IoT project
  • Raspberry Pi 40-pin Compatible GPIO enables installation as a peripheral to the Raspberry Pi
  • External onboard multi-functional Grove ports: Compatible with over 300 Plug&Play Grove modules to explore IoT
  • USB OTG Support: can act as a USB host (reads data or signals from a mouse, keyboard, MIDI device, 3D printer, etc.) or USB client (emulates a mouse, keyboard, or MIDI device to a host PC).
  • Support Arduino, CircuitPython, Micropython, ArduPy(What is ArduPy?), AT Firmware, Visual Studio Code
  • Azure Certified Device: Sense and tag real-world data and visualize through Azure IoT Central 
  • TELEC certificated


The Wio (Wireless Input and Output) platform (Wio LinkWio Nodes, etc.) was first introduced to the world at the end of 2015 by Seeed. 

Meet our new member: Wio Terminal is compatible with Arduino and Micropython, built with an ATSAMD51 microcontroller with wireless connectivity supported by Realtek RTL8720DN. Its CPU speed runs at 120MHz (Boost up to 200MHz). Realtek RTL8720DN chip supports both Bluetooth and Wi-Fi providing the backbone for IoT projects. The Wio Terminal is Highly Integrated with a 2.4” LCD Screen, there is an onboard IMU(LIS3DHTR), microphone, buzzer, microSD card slot, light sensor, and infrared emitter(IR 940nm). 

There are built-in magnets and two mounting holes on the well-designed enclosure, allowing you to set up your IoT project without hassle.

On top of that, it also has two multifunctional Grove ports for connecting with over 300 modules and Raspberry Pi 40-pin compatible GPIO for tons of Pi HAT add-ons, which means there are endless IoT possibilities you can create with this tiny device! 

With Wio Terminal, you can: 

  • Sense and tag the Real-World data with over 300 Groves created by Seeed and visualize through Azure IoT Central Platform to create an end-to-end IoT project
  • Use 100% open-source Hardware in a Pythonic way
  • Build your program interpreter starting from 90% with an LCD screen and compact enclosure
  • Create embedded GUI with easy-to-use graphical elements and beautiful visualized editing tools.

Check the Wio Terminal Starter Kit, which is a collaboration between Seeed and Microsoft for IoT beginners. The hardware includes Wio Terminal provided by Seeed, a variety of optional Grove, other mods, etc. Learn the basics of the Internet of Things with this free 12-week, 24-lesson curriculum from Microsoft Cloud Advocates. Build prototypes of real-world IoT projects as you learn all about IoT whilst following the journey of food from farm to table.

Connecting the Wio Terminal to Azure IoT Central

Wio Terminal is an Azure-certified device, not only can the artificial nose sense and tag the scents you want to know in the air, but everything can be analyzed and visualized in real time through Azure IoT Central. More importantly, you can automatically trigger rules when, for example, a bad smell is being detected, therefore allowing the nose to be much smarter than if it were just a standalone, offline, device.

Connecting the Artificial Nose to Azure IoT Central – Real-time telemetry.

What other cool things can you play with Wio Terminal?

  • Artificial Nose that can Discern Different Kinds of Rum or ScotchTV
  • Affordable IR Thermal Imaging Camera
  • Remote Controller
  • Cost-effective Pulse Oximeter
  • Weather Forecast Monitor
  • Run TinyGO on Wio Terminal
  • Printer
  • GPS Navigator
  • Water Level Detector



  • Python Terminal Device
  • Data Collection Machine Learning powered device
  • Hand-held analyzer 
  • Retro Gaming Device
  • IoT Controller
  • Smart Robot for Education
  • IoT application quick prototyping
  • Slave devise / Accessories for Raspberry Pi

Collaborate With the Worldwide Community! 

Wio Terminal Classroom

In this show, our engineer Lakshantha will explain how to use the Wio terminal along with the software and present you with fun demos as well! In this episode, you will learn about how to draw text strings by using the coordinate system and will learn to display "Hello World!" at the end of the video! 

Stay tuned to our show and we hope this helps you to gain more knowledge on how to program with the Wio Terminal!

Fully Open-source Manufacturing Process

As a fully open-source device, Wio Terminal development will continue to optimize its performance and every update will be publicized on our blog. We are also making a series of Vlogs about the fully open-source manufacturing process of Seeed products. From hardware and software development to each step of manufacture and testing, you can find all you want to know about Wio Terminal, check now!

Pinout Diagram

Wio Terminal Pin Out Overview by SeeedWio Terminal Pin Out Overview by @matsujirushi12

Hardware Overview

Setup and technical specifications:

  • An invitation to join the Seeed Community on Discord! Click here to join our Wio Terminal Channel for 24/7/365 making, sharing, and helping each other out. https://discord.gg/WSXszPA2wC
  • Please visit our wiki for more information about Wio Terminal. If you have any questions, feel free to ask us at our Forum.
  • Check Resource Roundup for Wio Terminal: Tutorials, Reviews, and Projects from Community and we hope some of them will inspire you!
  • Core Processor: ARM® Cortex®-M4F
  • CPU Speed: 120MHz(Boost up to 200MHz)
  • Program Memory Size: 512KB
  • External Flash: 4MB
  • RAM Size: 192KB
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Resolution: 320 x 240
  • Display Size: 2.4 inch
  • Driver IC: ILI9341
  • KM4 CPU: ARM® Cortex®-M4F
  • KM0 CPU: ARM® Cortex®-M0
  • Wi-Fi: 802.11 a/b/g/n 1x1, 2.4GHz & 5GHz
  • Bluetooth: Support BLE5.0
  • Hardware Engine: AES/DES/SHA
  • Accelerometer: LIS3DHTR
  • Microphone: 1.0V-10V -42dB
  • Speaker: ≥78dB @10cm 4000Hz
  • Light Sensor: 400-1050nm
  • Infrared Emitter: 940nm
  • microSD Card Slot: Maximum 16GB
  • GPIO: 40-PIN (Raspberry Pi Compatible)
  • Grove: 2 (Multifunction)
  • FPC: 20-PIN
  • USB Type-C: Power & USB-OTG
  • Dimension: 72mm*57mm*12mm
  • Materials: ABS+PC