the AI Hardware Partner
Toggle Nav

Ochin Tiny Carrier Board V2 for Raspberry Pi CM4

The Ochin CM4v2 is a tiny carrier board for the Raspberry Pi Compute Module equipped with the powerful Quad-core Cortex-A72 CPU and GPU, which features a big RAM size, the CODECs, and Graphic Accelerators. It's designed for a wide range of applications such as robotics, home automation, and IoT projects. The Raspberry Pi Compute Module 4 is not included.


In stock
  • 10+: $54.90


While Ochin V1 is at its EOL (end of life) stage, we are happy to present Ochin V2 

What's the difference between Ochin V1 and Ochin V2? 

  • uHDMI video output
  • current/voltage sensor
  • rgb led, button and USB-C on a small external board
  • 2x user LEDs
  • 100Base-T Ethernet without transformer
  • and much more!


The Ochin CM4v2 is a tiny carrier board for the Raspberry Pi Compute Module equipped with the powerful Quad-core Cortex-A72 CPU and GPU, which features a big RAM size, the CODECs, and Graphic Accelerators. It's designed for a wide range of applications such as robotics, home automation, and IoT projects. The Raspberry Pi Compute Module 4 is not included.


  • High-performance:Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
  • High Resolution Supported: 265 (HEVC) (up to 4Kp60 decode), H.264 (up to 1080p60 decode,1080p30 encode) and OpenGL ES 3.0 graphics
  • Rich Interfaces: 1×USB 2.0 port (highspeed); MIPI CSI-2: 1×2-lane MIPI CSI camera port, 1×4-lane MIPI CSI camera port; 1×USART, 3×UART, 1×I2C port, 1×SPI port, Analog Video Output
  • Strong Compatibility: Compatible with Raspberry  Pi Compute Module(CM4) with faster eMMC flash with up to 100 MB/s transfer rate, 4x faster than CM3+
  • Compact Design:Same size as CM4 module, 55mm × 40mm × 4.7mm


What is presented on this page is version 2 of the now well-known carrier board for integrated robotics ochin_CM4. In the new version, all the main features already present in v1 are retained, plus many innovations that make it more flexible and interesting for even more applications.

Some examples are the presence of the microHDMI port, which allows it to be used together with a monitor and therefore makes it usable not only in headless devices but also in user-side applications. A transformerless Ethernet interface is also available, in case one wants to connect to a device equipped with an Ethernet interface.

In version v2, a small external board has been added that allows the flash to be programmed, but also its use during normal operation thanks to an RGB LED and a user button, making it very useful as a minimal interface to the system (once the flash has been programmed, you can simply decide not to connect it if not in use).

The following table summarises the new features in ochin_CM4 v2 compared to v1. 


The board is compatible with all Raspberry Pi CM4 modules equipped with eMMC. Depending on your needs, you can select a CM4 module with an SDRAM of 1GB, 2GB, 4GB, or 8GB and the eMMC of 8GB, 16GB, or 32G, with or without the Wi-Fi / BT4 connection.

The Ochin v2 board has also been tested to work with OpenHD open source software.Thanks to OpenHD it is possible to transmit an HD video stream with low latency from a mobile station (rover, drone, plane, etc ..) to a ground station. This was possible thanks to the enormous work of the OpenHd community which we thank very much.

There are rich interfaces available on board including 1x microHDMI port, 4×USB 2.0 port (highspeed),  1×2-lane MIPI CSI camera port, 1×4-lane MIPI CSI camera port, 3×UART, 1×I2C port, 1×SPI port, and Analog Video Output, 1x 100baeT Ethernet port, all of which enable the Ochin CM4 to connect to external hardware at lower abstraction layers, closer to the physical world.

In terms of external dimensions, it's the same as the CM4 module which adopts a completely new mechanical standard. The overall footprint is reduced, resulting in a smaller and more compact form factor suitable for integration into products.


In this repository, you can find the manual of the board, a quick start guide for flashing the CM4 module, and a guide with some tips on how to make the connections to the ochin board.

It is important to read them both before turning on the Ochin CM4v2 board, to know its characteristics and above all the sequence in which the signals are present on the connectors.

It will be better to use this carrier board with the heatsink:

● Aluminum Alloy CNC Heat Sink without Fan for Raspberry Pi CM4 Module: It provides better heat dissipation through passive cooling while protecting the compute module

● Aluminum Alloy CNC Heat Sink with Fan for Raspberry Pi CM4 Module: It also provides faster cooling through active cooling using a PWM fan.

Here are some camera modules that you can use together:

● Raspberry Pi Camera Module V2: It carries an 8-megapixel Sony IMX219 image  sensor with high resolution and great performance.

● Raspberry Pi Wide Angle Camera Module: Raspberry Pi Wide Angle Camera Module is a low-cost Fisheye Lens, wider Field View, Camera module, designed for  Raspberry Pi.

● IMX219 M12/CS mount CMOS Camera Module: This IMX 219 CMOS camera module is based on the high-resolution Sony IMX 219 sensor and supports both M12 CS mount lenses.

Moreover, this Ochin CM4 carrier board is perfect for your robotic project due to the following features:

● Its compact design which has the same size as the Raspberry Pi module

● Ochin_CM4v2 embeds a dc-dc regulator that provides up to 7Amp. You can supply the board directly by connecting a LiPo battery (from 3,5V to 36V) and it will also supply the connected devices, even for a power-hungry USB device.

● On the Ochin_CM4v2 board, there is a GHS connector for almost every peripheral, no more picking up the signal from a strip and sharing the grounds and supply pins. In real applications you want a connector with signals and supply for every peripheral, it more clean and safe!

● Ochin has a current switch on the USB VBUS, so the +5V on the USB will be cut if the drawn current reaches the threshold of 3A. It's a protection circuit necessary  to keep the CM4 on if you have a short on the USBs devices.

● Ochin_CM4 has two CSI camera connectors that you can use for two 2 CSI cameras and others on the 4x USBs if you need them.

Here we are introducing this new ochin CM4v2 carrier board and its story! Flavio Ansovini is an enthusiast of electronics, robotics, and programming, and in recent years he has applied his skills to the world of RC models and drones. To make the most of the Raspberry Pi CM4 module he decided to create a carrier board oriented to robotics, drones, IoT devices, and in general embedded devices.


The Ochin CM4 has been licensed to Seeed to manufacture and sell. Flavio will provide the tech support and Seeed will fulfill the order with hardware quality guaranteed.



  • Audio/video manipulation and streaming
  • Neural networks
  • Machine learning
  • Computer vision
  • Robotics
  • Drones
  • Home automation
  • IoT projects




Broadcom BCM2711, Quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz


● H.265 (HEVC) (up to 4Kp60 decode), H.264 (up to 1080p60 decode, 1080p30 encode)

● OpenGL ES 3.0 graphics


● 1×USB 2.0 port (highspeed)

● MIPI CSI-2: o 1×2-lane MIPI CSI camera port, 1×4-lane MIPI CSI camera port

● 1×USART, 3×UART, 1×I2C port, 1×SPI port, Analog Video Output


55mm × 40mm × 4.7mm


Hardware Overview





Part List

Ochin CM4 v2 -Tiny Carrier Board (Without CM4)


Connect Cable




1. Just wondering... which variety of the CM4 Module (with EMMc memory, with MicroSD card, with or without WiFi, with 2,4,8 GB RSM is presumably the best bet?

Answer: EMMc is mandatory, Ochin board doesn't have the sdcard header. The reasons why are: save space for other connectors (i wanted to keep the same size of the cm4), emmc is much faster and durable, and the interface is used for emmc OR sdcard (cm4 with EMMc doesn't work with sdcard). If you want to use OpenHD 16GB is enough (maybe 8GB but not sure). I'm also developing an sw, totally different in goal and type from OpenHD and it may need more space, I'll tell you more very soon. About the RAM, OpenHD guys say that 1GB is enough, with other sw you may need more, depending on what you want to do, for example for computer vision, machine learning, etc, more is better. In my opinion, 16GB EMMc 2GB RAM is a good option, but if you want to develop sw you better go to 32GB.

2. This model could be connected by USB to a mobile or tablet and have video and data in the Qgroundcontrol app or OpenHD App, right?

Answer:This is a carrier board for the Raspberry Pi CM4. If you fly with OpenHD you can connect the smartphone to the ground station

3. This model could be connected to an HDMI display and become a groundstation itself?

Answer: Thanks to the microHDMI connector it’s now possible to connect it to a display and use the ochin as a ground station, and connecting a Joystick to one of the available USBs it also became an AIO controller.

4. How do I remove the CM4 from the Ochin CM4?

Answer:Print and use the extractor for the CM4 module if you don't want to break the mezzanines, you can find the .stl in the "3d/Covers turrets and extractors" section of this repository.

5. What Is Seeed Fusion Licensed Products Program

Seeed licensing means that the licensor (cooperative partner) grants its own products (software or hardware), trademarks, brands, etc. to the licensee (Seeed) in the form of a contract. Seeed will assist with all electronics manufacturing including structural parts, testing, certification, provide engineering and quality assurance services, and promotion, sales and distribution around the world using Seeed’s own network and channels. Seeed will ensure that your product is well looked after from start to finish.


HSCODE 8543909000
USHSCODE 8471490000
EUHSCODE 8543709099




Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account