OpenMV Cam H7: the Open Source MicroPython Powered Machine Vision Camera

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The New OpenMV Cam H7 is an upgrade of the previous OpenMV Cam M7, replacing the STMicro STM32F7 micro-controller by a more powerful STM32H7 MCU clocked at up to 400 MHz and introducing removable camera modules for thermal vision and global shutter support.

The OpenMv Cam aims at becoming a super powerful Arduino with a camera on board that you program in Python. In fact it can be programmed with MicroPython 3 using OpenMV IDE or in C language, if you desire.

MicroPython is a popular open-source microcontroller operating system that runs on other micro-controllers like the BBC Microbit, ESP8266, ESP32, the Teensy, and Adafruit’s Feather Circuit Python boards.

Programming your OpenMV Cam H7 using Python versus C gives you less than 1 secondcompile/load/execute times allowing you to quickly iterate on your project.

That said, the OpenMV Cam H7’s firmware is 100% open-source and you can program the OpenMV Cam H7’s STM32H7 microcontroller directly in C if you prefer.

OpenMV CAM H7 adds support for Multi-Blob Color Tracking at up to 80 FPS, Global Shutter at 80 FPS at VGA/QVGA, 200 FPS at QQVGA, and 400 FPS at QQQVGA, thermal vision support via a FLIR camera module, as well as CNN neural networks via Arm’s CMSIS-NN library.

OpenMV CAM H7 camera board specifications:

• MCU – STMicro STM32H743VI Arm Cortex M7 microcontroller @ up to 400 MHz with 1MB RAM, 2MB flash.
• External Storage – micro SD card socket supporting up to 100 Mbps read/write to record videos and store machine vision assets.
• Camera modules
  • Omnivision OV7725 image sensor (default) capable of taking 640×480 8-bit Grayscale /  16-bit RGB565 images at 60 FPS when the resolution is above 320×240 and 120 FPS when it is below; 2.8mm lens on a standard M12 lens mount
  • Optional Global Shutter camera module to capture high quality grayscale images not affected by motion blur
  • Optional FLIR Lepton adapter module for thermal machine vision applications
• USB – Full speed (12 Mbps) micro USB interface with the board appearing as a Virtual COM Port and a USB Flash Drive in your computer
• I/Os
  • 1x SPI bus up to 100 Mbps, 1x I2C
  • CAN Bus, Asynchronous Serial Bus (TX/RX)
  • 12-bit ADC, 12-bit DAC.
  • 3x I/O pins for servo control.
  • Interrupts and PWM on all I/O pins (10 I/O pins on the board).
• Misc – RGB LED, 2x high power 850nm IR LEDs.
• Power Supply
  • 5V via micro USB port
  • LiPo battery connector compatible with 3.7V LiPo batteries.
• Dimensions – 45 x 36 mm
• Weight – 19 grams

OpenMV CAM H7 has now launched on Kickstarter, but you’ll have to be fairly patient before getting you board as actual shipping is only planned for March 2019.

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