The XCaliber IoT/Operating System Platform for Arduino consists of the Microprocessor Operating System (IoT/MOS) and the Virtual Input/Output Component (IoT/VIO) which provides interconnections between microprocessors and their individual components. Devices can now be shared across I/O channels by interconnected systems. The XCaliber IoT/OSP is distributed as Source Code for the Arduino Systems.
Source Code: 1,547 Lines
Cost is less than $0.02 per line!

This laboratory test bench shows two (2) different model Arduino processors sharing an LCD Display, Adafruit ILI9341 TFT Touch-Screen, RFID-RC522, two (2) SD Card Modules, ESP8266 WiFi Connection, HMC5883L Magnetometer, and HC-05 Bluetooth Connection.

Here is the wiring diagram for XCaliber IoT/VIO using an ISC – I2C Connection for component sharing and virtualization.