Gumstix Introduces CM4 to CM3 Adapter, Carrier Boards for Raspberry Pi Compute Module 4

Raspberry Pi Trading has just launched 32 different models of Raspberry Pi CM4 and CM4Lite systems-on-module, as well as the “IO board” carrier board.

But the company has also worked with third-parties, and Gumstix, an Altium company, has unveiled four different carrier boards for the Raspberry Pi Compute Module 4, as well as a convenient CM4 to CM3 adapter board that enables the use of Raspberry Pi CM4 on all/most carrier boards for the Compute Module 3/3+.

Raspberry Pi CM4 Uprev & UprevAI CM3 adapter board

Gumstix Raspberry Pi CM4 Uprev follows the Raspberry Pi Compute Module 3 form factor but includes two Hirose connectors for Computer Module 4. The signals are simply routed from the Hirose connectors to the 200-pin SODIMM edge connector used with CM3.

Gumstix Raspberry Pi CM4 Uprev is the same except it adds a Google Coral accelerator module.

Gumstix Raspberry Pi CM4 Development Board

Specifications:

  • 2x stacking board DF40-series connector for Raspberry Pi Compute Module 4
  • Video & audio output – HDMI 2.0 port, MIPI DSI + touchscreen connectors
  • Camera I/F – 2x CSI2 connectors
  • Networking – Gigabit Ethernet RJ45 port
  • USB – 1x USB Type-A port, 1x micro USB device port
  • Expansion
    • M.2 M-Key socket with single-lane PCIe, compatible with 2280 NVMe drives and Google Coral M.2 module
    • 40-pin Raspberry Pi 4 header
  • Debugging – Micro USB console port using FTDI FT232RQ USB UART chip
  • Power Supply – 20V DC power jack (2.0 mm)
  • Dimensions – 12 x 8.5cm

The board is quite more compact than Raspberry Pi’s official IO board, and is designed to develop production-grade embedded hardware for robotics, AI at the edge, and advanced industrial automation.

Gumstix Raspberry Pi CM3/CM4 Robo

That’s one is a small robotic breakout board designed for Raspberry Pi CM3, but it can also be used with Raspberry Pi Compute Module 4 thanks to the aforementioned adapter board.

With autonomous vehicles in mind, the board comes with two Raspberry Pi camera connectors for stereoscopic depth mapping for object avoidance or front- and back-facing cameras for feature identification or manual control.

Gumstix Raspberry Pi CM4 PoE Smart Camera

Another board that combines RPi CM4 module support with a Google Coral accelerator module. Gumstix Raspberry Pi CM4 PoE Smart Camera board also features a Gigabit Ethernet port with PoE, a camera connector, and as such offers a solution for image classification, object identification etc.. with low latency and single-cable deployment.

Gumstix Raspberry Pi CM4 + Pixhawk FMUv6

The last carrier board from Gumtick is made for drones as it complies with Pixhawk‘s v6 specifications for Flight Management Units (FMUs). The board features an STM32H7 Cortex-M7 microcontroller with 2MB Flash, a Google Coral module, various sensors (accelerometer, magnetometer, gyroscope, and barometer), two camera connectors, standard Pixhawk data and power connectors (GPS, analog power, RC, and CAN connectors), and octal PWM outputs. There are programming ports to flash CM4’s eMMC flash and STM32 firmware, as well as monitor their respective serial consoles from the same USB Type-C ports.

Pricing and availability

All boards without a Google Coral module are available now, while boards with the AI module are shown as “Coming soon”. Prices are as follows:

  • CM4 to CM3 adapter board –  $30.00
  • CM4 to CM3 Adapter board with  Coral –  $75.00
  • Gumstix Raspberry Pi CM4 development board – $130
  • Small robotic breakout board –  $75.00
  • PoE Smart Camera board with Coral – $95.00
  • Gumstix Raspberry Pi CM4 with Coral + Pixhawk FMUv6 – $180

You can purchase or pre-order to boards on Gumstix store. Since all boards are designed with Gumstix web platform, you can also customize the boards in your web browser to better match your requirements, and the company is currently waiving the usual $1,999 manufacturing fee for “qualified” CM4 custom designs until the end of the year, meaning customers only need to pay for the cost of the board and quantity ordered, plus tax and shipping.

As a side note, Gumstix is not the only company offering a promotion for custom CM4 carrier boards, as Seeed Studio offers around $500 in sponsorship for boards manufactured through its Seeed PCB Assembly service and if you sell the boards via the Seeed Marketplace. The company offers to manufacture 5 boards for free, with two sent to the designers, and three placed on the marketplace. Check out the relevant blog post for details.

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