The Raspberry Pi returns the list of devices connected to the USB ports. Once the connection has been made, you can check the devices connected to the serial port by typing the command in the terminal: lsusb In the menu, select “5 – Interfacing Options” then “P6 Serial” and validate. To do this, enter the following command in a terminal: sudo raspi-config To use the serial interface of the Raspberry Pi, it must be enabled in the configuration menu. We remind you that in order to be able to use your Raspberry Pi without screen or keyboard, the VNC remote connection must be configured. In this tutorial we will focus on the USB connection. It is also possible to create serial communication by using the Rx/Tx pins of both components. So we need a USBA Male to USB B Male cable. In our case, we use a Raspberry Pi 3B+ and an Arduino UNO. To establish serial communication between Raspberry Pi and Arduino, simply connect them with a suitable USB cable. Prerequisite: Serial communication with Arduino, Remote access to Raspberry Pi with VNC Hardware In this article we use the Arduino UNO card but it can be adapted to other types of cards with a serial connection (Nano, Mega, Feather, EPS32, ESP8266, etc.). We will see in this tutorial how to set up a serial communication between Raspberry Pi and Arduino via the USB port. The first example that comes to mind is the use of this system for home automation in which the Raspberry Pi will host the control interface and intelligence and the Arduino will act as a programmable automaton acting on the components at the end of the chain (light, radiator, fan, sensors, etc.). This makes it possible to couple the computing power and wireless interfaces of the Raspberry Pi with the inputs/outputs and the Arduino collection of modules. If it doesn't work, select a different port at “serial in”.In some projects it may be interesting to establish a serial communication between Raspberry Pi and Arduino. Now click on Deploy at the top right and test your circuit.
Then check “Initialize pin state?” on, select “initial level of pin – low (0)” and give the block a name. Then double click on the block “rpi gpio out” and select “GPIO17 – 11”, then select “Digital output” at type.
Select the correct port and give the block a name. Now connect these blocks with each other and now it is time to set the blocks. Then go to the heading “Raspberry Pi” and drag an “rpi gpio out” to the white area. Go to the heading “Network” and drag a “serial in” to the white area. On the left you see a row of blocks that you can add. Go to the web browser on you Raspberry Pi or on another PC and go to this link. You will now see a console with a link that will look something like this: “”. Now that you have programmed the Arduino you can connect it to the Raspberry Pi. Step 4: the Raspberry Pi computer programming
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