Raspberry Pi is great tool for embedded engineers but it lacks ADC. One more draw back is all its IO’s are 3.3V level. On the other side Arduino is good at sensing the physical world using sensors. To get benefits of both the systems one may want to interface them.
We can divide this interfacing problem into two steps. There are many interface options available in both boards like UART, IIC and SPI. The choice of protocol depends on the requirement of the application and roles of the Arduino and Raspberry Pi. The main problem arises when we try to make physical connection between the two boards because they are working on different voltage levels. We need to use level shifters to avoid any damage to the Raspberry Pi and to get expected results. There is nice blog on arduino forms. If you are not aware the level shifters you can build one by looking at this blog. Once we have physical connection between the two, they can start talking with each other. On Pi side you can use any of your favorite programming language.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.