Interface Library

The OpenMV Cam comes built-in with an RPC (Remote Python/Procedure Call) library which makes it easy to connect the OpenMV Cam to another microcontroller like the Arduino or ESP8266/32. The RPC Interface Library works over:

• Async Serial (UART)
• I2C Bus
• SPI Bus
• CAN Bus

With the RPC Library you can easily get image processing results, stream RAW or JPG image data, or have the OpenMV Cam control another Microcontroller for lower-level hardware control like driving motors.

OpenMV provides the following libraries for interfacing your OpenMV Cam to other systems below:

• Arduino Interface Library for I2C, SPI, CAN, and UART Comms

Performance

OpenMV Cam RT1062:

• Async Serial (UART) - at up 20 Mb/s.
• I2C Bus - at up to 1 Mb/s.
• SPI Bus - at up to 60 Mb/s.
• CAN Bus - at up to 1 Mb/s.

Arduino Portenta, Arduino Nicla Vision:

• Async Serial (UART) - at up 7.5 Mb/s.
• I2C Bus - at up to 1 Mb/s.
• SPI Bus - at up to 80 Mb/s.
• CAN Bus - at up to 1 Mb/s.

Pure Thermal OpenMV:

• Async Serial (UART) - at up 7.5 Mb/s.
• I2C Bus - at up to 1 Mb/s.
• SPI Bus - at up to 80 Mb/s.
• CAN Bus - at up to 1 Mb/s.

OpenMV Cam H7, OpenMV Cam H7 R2, OpenMV Cam H7 Plus:

• Async Serial (UART) - at up 7.5 Mb/s.
• I2C Bus - at up to 1 Mb/s.
• SPI Bus - at up to 80 Mb/s.
• CAN Bus - at up to 1 Mb/s.

OpenMV Cam M7:

• Async Serial (UART) - at up 7.5 Mb/s.
• I2C Bus - at up to 1 Mb/s.
• SPI Bus - at up to 54 Mb/s.
• CAN Bus - at up to 1 Mb/s.

OpenMV Cam M4 V1, OpenMV Cam M4 V2:

• Async Serial (UART) - at up 7.5 Mb/s.
• I2C Bus - at up to 1 Mb/s.
• SPI Bus - at up to 45 Mb/s.
• CAN Bus - at up to 1 Mb/s.