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reTerminal CM4104032 - AI, IoT, IIoT Human Machine Interface, All-in-one Board, Modular Design, RPi CM4 32GB powered, IPS multi-touch screen, 2.4GHz/5GHz Wi-Fi & Bluetooth 5.0, rich interfaces


The reTerminal is a Human-Machine Interface facility, designed in modularization, offered multiple interfaces and components. It is your hand-size, powerful, Raspberry Pi-based all-in-one board, assisting you to develop individual IoT & AI projects and being ready to materialize industrial-level monitor and control functions.



The reTerminal is a Human-Machine Interface facility, designed in modularization, offered multiple interfaces and components. It is your hand-size, powerful, Raspberry Pi-based all-in-one board, assisting you to develop individual IoT & AI projects and being ready to materialize industrial-level monitor and control functions.


  • Raspberry Pi All in One Board: Powered by RPi CM4 32GB, integrated with IPS multi-touch screen, dual-band Wi-Fi & Bluetooth, pre-installed compatible Linux system
  • Modular Design: Featuring industrial high-speed expansion interface and 40-Pin Raspberry Pi compatible header
  • Rich Interfaces & Components: Equipped USB Type-A ports, Gigabit Ethernet, micro-HDMI, micro-SD card slot, MIPI camera interface, light sensor, accelerometer, buzzer, RTC and programmable buttons
  • Neat Personal Assistance: Enjoy yourself in multiple interested Dashboard or AI projects by Seeed and communities while utilizing built-in sensors and components
  • Great Industrial Facility: Benefit from stable Raspberry Pi-based operating system, multiple expanded industrial-level connectors, cryptographic co-processor, and official Seeed expansion board reTerminal E10-1


The reTerminal is a Raspberry Pi all-in-one board, powered by Raspberry Pi Compute Module 4(CM4) module, integrated with one IPS panel type multi-touch screen, carried with dual-band 2.4GHz/5GHz Wi-Fi & Bluetooth 5.0, pre-installed Raspberry Pi-based Linux system, provided storage 4 GB RAM and 32 GB eMMC. By designing in modularization, the board is equipped with multiple accessible components and high-speed connectors. It can be neatly inputted home assistance and individual AI development applications, also performing industrial-level functions suitable for being an industrial facility.

Design in Modularization

Being an IoT hardware partner since 2008, Seeed improves its ability of hardware integration and designs the reTerminal to be modular. Hence, the reTerminal includes one industrial high-speed expansion PCIe interface on the back, along with a Raspberry Pi compatible 40-Pin GPIO connector beside, extremely expanding its application fields. Since the official expansion board reTerminal E10-1 has been published, reTerminal now is carriable and can be utilised in more advanced scenarios.

Rich Interfaces & Components

This all-in-one board still comes with 2 USB 2.0 Type-A ports, one MIPI camera interface, 4 programmable buttons, one RJ45 Gigabit Ethernet connector, one micro-SD card slot and an additional micro-HDMI interface which supports 4K resolution with a frame rate of 60 fps. These can be programmed for your further usage.

Meanwhile, there are several components mounted on the board, including a light & proximity sensor, LIS3DHTR accelerometer, buzzer, and Real-Time Clock(RTC). The power indicator light as well as other system user lights on the board can be used by your definition.

Wild Application Areas

The reTerminal can be your personal useful development board since it is built around Raspberry Pi CM4 module, and it provides multiple function thanks to its unique modular design and rich interfaces. You will find it more interesting when you discover there are plenty skillful IoT & AI projects published by Seeed and the community.

And yet what about Industrial Internet of Things(IIoT) applications? It can be even amazed that reTerminal has equipped a cryptographic co-processor. That is to say, the reTerminal assembles a stable Linux operating system, high-speed expansion connector, multiple types of universal I/O, and hardware security, all of which make it hardware-ready for industrial equipment monitor and control.

Seeed Proficient Customization Service

With over 10 years of ODM & OEM experience and in-depth understanding of popular open-source hardware, we promise you the professional and flexible customization service for the reTerminal, as well as helping your creative ideas come into reality based on Raspberry Pi CM4.


Practical Tools Utilization

We here publish some widely useful tools that can be used in reTerminal, for your convenience.

Home Assistant

Home Assistant allows you to get on top of your energy use with its home energy management feature. It keeps your data local, managed all your devices automatically, controlled by Companion Mobile Apps.

Check our Home Assistance wiki application here.

Remote Management for reTerminal

Want remotely control the reTerminal?

Follow our wiki to setup Mender Client on a reTerminal to access OTA updates from a Hosted or Self-Hosted Mender Server.

Mount Options for reTerminal

Seeed provides a wiki containing several mount options for reTerminal form the community.


Specification Details
Platform Processor Broadcom BCM2711 quad-core Cortex-A72 (ARM v8)
Frequency 64-bit SoC @ 1.5GHz
Memory Capacity 4GB
Technology LPDDR4 with on-die ECC
eMMC Capacity 32GB
Wireless Wi-Fi 2.4GHz and 5.0GHz IEEE 802.11b/g/n/ac
Bluetooth Bluetooth 5.0, BLE
Display LCD 5-inch 720x1280 LCD
Touch Panel Capacitive touch panel (support multi-touch)
Video HDMI 1 x Micro HDMI output (up to 4Kp60 supported)
CSI 1 x 2-lane MIPI CSI camera interface
Multimedia H.265 (4Kp60 decode)
H.264 (1080p60 decode,1080p30 encode)
OpenGL ES 3.0 graphics
Built-In Modules Real-Time Clock NXP Semiconductors PCF8563T
Low backup current; typical 0.25μA at VDD = 3.0 V and Temperature = 25 ℃
Accelerometer STMicroelectronics LIS3DHTR
16-bit, ±2g/±4g/±8g/±16g dynamically selectable full scale
Encryption Microchip ATECC608A
Secure Hardware-Based Key Storage, Asymmetric Sign, Verify, Key Agreement
Light Sensor Levelek LTR-303ALS-01
Digital light sensor
Internal IO
Microchip MCP23008-E
Buzzer ≥85dB @10cm 2700±300Hz
External I/O GPIOs Up to 5 × UART
Up to 5 × I2C
Up to 5 × SPI
1 × SDIO interface
1 × DPI (Parallel RGB Display)
1 × PCM
1 × PWM channel
Up to 3× GPCLK outputs
Vertical expansion
1 × PCIe 1-lane Host, Gen 2 (5Gbps)
1 × USB 2.0 port (highspeed)
26 x GPIOs
Power Voltage 5V DC
Current 3A(Minimum)
Temperature Operating Temperature 0 - 70°C( For the LCD Screen: 0 - 60°C)
Mechanical Dimensions 140mm x 95mm x 21mm
Weight 285g


Certificates CE, FCC, TELEC(211-210815)

Hardware Overview

If you want to check the GPIO pin you can refer to the GPIO Pin Schematic Diagram.


Before you attach a camera with the CSI 22 Pin cable to the board, please double-check the FFC contact pins are facing up.

Part List

reTerminal CM4 x1
Screw Driver x1


How can I remove the case and disassemble the reTerminal?

You can refer to this video or getting started wiki to disassemble the trTerminal.

Can I install other systems, like Ubuntu? How can I do it?

Yes, the reTerminal is supporting Ubuntu and you can check here to see how to install it.

How can I boot an OS from USB Flash Drive?

You can see the wiki here to boot an OS from USB Flash Drive.

I have more questions about the reTerminal?

Seeed has a wiki assembled all the questions that users care about the most, you can click here to see it.


HSCODE 8471419000
USHSCODE 8471410150
EUHSCODE 8471707000
CE 1
EU DoC 1
RoHS 1
UK DoC 1



Learn how to get started with the reTerminal and turn your ideas into a reality!
In Edge Impulse train a car detector – this should be fairly easy since we are using transfer learning and the base model already was trained to detect cars, so it contains the necessary feature maps.
By following the guide below, you will be able to build your own reTerminal system image using Yocto. So let's get started!
It has a simple structure that makes it easy to understand and extend. It relies only on the well-known Makefile language. Buildroot is an open source project and many developers contribute to it daily.
You can build your own UI application for reTerminal with LVGL 8.0, you can have a look at the example code in this GitHub repository.
Check how to build your own user interface using Qt for Python on the reTerminal. and also Seeed_Python_ReTerminal_Examples
Mediapipe is currently under active development and includes multiple demos, that can be run out-of-the box after installing Mediapipe on reTerminal.
You can use TFLite Converter to convert any Tensorflow model into .tflite format, provided it only consists of operations supported by TFLite Runtime. And we also build demos on Object Detection, Image Classification, Semantic segmentation, Face age/gender recognition, Face expression recognition, and Face anti-spoofing.
We’ll unbox the device - the reTerminal to see what is included and we’ll then set up a weather dashboard on it using Grafana.
Detect unauthorized person, lights ON and Push notification to cell phone. No more false alerts due to pets and stray animals.
It's time to look at the Top 40 Raspberry Pi 4 Projects that you can refer to and try building yourself!
This blog will talk about how you can control your smart home appliances using Node-RED running on the OpenWrt System and teaching you step by step.
What is TensorFlow Lite ? Just heard of TensorFlow Lite and want to know more about it? Today we will discuss everything about TensorFlow Lite.
This blog will show you three ways to configure WiFi on your Raspberry Pi with both Raspberry Pi OS desktop and server, and it will also cover how to do it on a headless Raspberry Pi!
Here's the way to let you know more about reterminal, and how to make your own PCB module, test it, and make it available!
We provide you the video guide to disassemble the reTerminal properly without damaging the device.
This blog is written by Philip(aka. Dsrc12), a biomedical engineer and head of Intelligent Transport System(ITS) Projects for the NSW Government. Now is devoting himself to STEM as a volunteer. Thanks for Philip’s contribution.
A computer vision system that detects and localizes the surface cracks in the concrete structures for the predictive maintenance on the Seeed Studio reTerminal
We have gone from having industrial robots to having the possibility of having robots in our homes. Today it is possible to have a robotic arm to perform specific tasks in our homes or a robot to clean or monitor our homes.



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  1. Product Quality
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  3. Product Quality
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    Nice case
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  5. Product Quality
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    Really nice hardware and works out of the box with a 32bit Raspberry OS, and all examples worked. It could only be better with a 64bit OS like Raspberry 64bit OS or Ubuntu 20.04 64 bit so it would be ROS2 ready for industrial use.


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