Seeed Wio Terminal ATSAMD51 Core with RTL8720DN - Compact IoT Terminal

In this review the Wio Terminal ATSAMD51 Core is assessed as a compact, highly integrated development terminal aimed at makers and embedded developers who want an immediate, out-of-the-box device for prototyping IoT and TinyML projects. The single biggest reason to buy is that it combines a color 2.4' LCD, multiple sensors and Grove compatibility with a faster ATSAMD51 processor and dual-band wireless (Realtek RTL8720DN), so users can move from idea to data collection or edge inference without assembling a bulky parts pile.

Key Features

• 2.4' LCD Screen: The built-in display lets developers inspect data, menus, and simple UIs without an external monitor, speeding development and demos.
• ATSAMD51 Processor: A 120MHz core (with boost to 200MHz) provides noticeably more headroom than typical 32-bit micros for signal processing and TinyML tasks.
• Realtek RTL8720DN Wireless: Onboard Bluetooth and dual-band Wi-Fi enable robust connectivity for IoT projects and remote data logging.
• Rich Onboard Peripherals: Microphone, buzzer, IMU sensor, light sensor, infrared emitter and microSD slot reduce the need for immediate add-ons for sensing and local storage.
• Grove and Raspberry Pi Compatibility: Two Grove ports plus 40 Raspberry Pi compatible GPIO pins make it simple to expand with 300+ Grove modules or connect to a Pi without soldering.
• Software Flexibility: Support for Arduino, MicroPython, ArduPy and other toolchains means the same device can be used for education, rapid prototyping, and embedded scripting.

Who It's For

The Wio Terminal is best for hobbyists, educators, and embedded developers who want a compact display-equipped microcontroller that can run experiments, collect sensor data, and prototype TinyML on the edge. Its combination of onboard sensors and wireless connectivity is ideal for portable demos, classroom projects, or environmental sensing.

Those who need industrial-grade ruggedness, large displays, or a full single board computer experience should look elsewhere; while the device pairs with Raspberry Pi, it is principally a microcontroller terminal rather than a replacement for a desktop single board computer.

Pros & Cons

Pros

• Very compact and integrated hardware that reduces wiring and setup time for prototypes.
• Strong processor and dual-band Wi-Fi plus BLE give more performance and connectivity than many microcontroller boards.
• Easy expansion via Grove ports and Raspberry Pi compatible GPIO makes adding sensors and actuators straightforward.
• Wide software support so users can choose Arduino, MicroPython or other environments.

Cons

• Some users report intermittent functionality issues, so reliability may vary and troubleshooting can be required.
• As a terminal device it is not a full single board computer, so it cannot replace larger Pi-class systems for heavier compute tasks.

Specifications

Processor	ATSAMD51, 120MHz (boost to 200MHz)
Wireless	Realtek RTL8720DN - Wi-Fi 2.4G/5G and Bluetooth BLE4/5.0
Display	2.4' color LCD
Onboard Sensors	IMU (LIS3DHTR), microphone, light sensor, infrared emitter
Expansion	2 Grove ports and 40 Raspberry Pi compatible GPIO pins
Storage	microSD card slot

Our Verdict

The Wio Terminal ATSAMD51 Core is a well-rounded, compact terminal for makers and educators who want an integrated device ready for IoT, sensing, and TinyML prototyping. Its powerful processor and dual-band wireless deliver good value relative to single-purpose microcontroller boards, though occasional quirks reported by users mean some patience with debugging may be required.

Frequently Asked Questions

Can I program the Wio Terminal in Python?
Yes. It supports MicroPython and other Pythonic environments so developers can script directly on the device.

Does it work with Raspberry Pi add-ons?
It has 40 Raspberry Pi compatible GPIO pins plus Grove ports, allowing many Pi-style modules and sensors to be connected.

Is wireless supported out of the box?
Yes. The integrated Realtek RTL8720DN provides Wi-Fi on 2.4G and 5G bands and Bluetooth BLE4/5.0 for connectivity.