I wanted to add some sensors to a Raspberry Pi but I was quickly running out of GPIO pins, luckily I had some spare Arduinos so decided to experiment with plugged one into the Pi. I got the Arduino set up with the sensors and connected it via USB to the Raspberry Pi.
To get the readings in Node-RED install Node-RED serialport, restart Node-RED and select the serial port node. To set it up you need to put in the serial port you are using. My settings looked like the following image.
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, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, 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.