Although it is about two different platformsThe truth is that both technologies They are excellent options for develop any DIY project. These devices share many positive aspects; they are from low cost and easy to program.
But it doesn't make sense to always place them on opposite sides. This is because they can be used together. which optimizes the functioning of both, using the best aspects of each.
While arduino boards y Raspberry They are quite easy to use with some experienceUsing them together requires a guide like the one we will offer you below.
What are the benefits of combining Arduino and Raspberry Pi?
The benefits of combining Arduino with Raspberry Pi are numerous. It is only necessary to name the positive aspects of each of them, since they do not counteract each other.
Which we show you below:
- The two cards They share portability of their dimensions. That is, they are much smaller and lighter than any laptop computer.
- If only Arduino It has open hardware, Both projects have a open source software to control the boards.
- By combining both, we can obtain greater computing power, offered by microcomputers of Raspberries, and a great versatility for uses such as microcontrollers arduino.
- Using both platforms together, It is possible to do without a laptop or desktop. This is because current Raspberry Pi boards have sufficient connections for peripherals such as keyboards and monitors. They also offer built-in Wi-Fi connectivity.
- Another advantage of using both hobs in a complementary way is the number of tools available in terms of programming codes. This is due to the strong support and community members who use them together. In addition, there are numerous accessories and projects already created for practicing and developing your own ideas.
- For its part, Arduino boards provide a better and more varied use of sensors and chipsBut, above all, if you are just starting out in the world of programming, Arduino IDE This is a great first step, as it is easier to use than Linux.
Learn step by step how to install Arduino on a Raspberry Pi from scratch
The main items you will need for Start installing Arduino IDE in a Raspberry Pi board These are precisely them. But it is also necessary to have a USB data cable and a Internet connectionYou should keep in mind that the latter can be replaced with the Arduino driver installer downloaded to an external storage device.
The necessary software can be found on the official Arduino website, so you will need to follow these steps:
- Open your browser and type the URL in the address bar.
https://www.arduino.cc/en/softwareNext, look for the download option for the Linux operating system version based on processors ARM 32-bit. - Once the programming environment has been downloadedYou will need to connect both boards via USB cable and do the same with the power supplies.
- Then, already from the Raspberry Pi interface Unzip the file into a new folder.
- You run the file in the terminal “install.sh”.
In the case of using a remote connection to Raspberry PiGenerally, if you don't have a dedicated monitor, you need to connect the board through the SSH terminal or with VNC Viewer.
In either case, you run the following commands to update the repository's program list:
sudo apt-get updatesudo apt-get upgrade
Next, install Arduino using the command and wait for the process to finish. To do this, you will need to type:
sudo apt-get install arduino arduino-core
Once you've done this, you can find the software through the menu “Programming”. It's time to verify if the installation of both the software and the hardware were correct.
To do this you will use the command:
dmesg | grep ttyACM
If so, you will need to obtain the answer:
ttyACM0: USB ACM device
All that remains is to test the functionality of both boards with any project available online; for example, you can use these programming codes for an internet access point:
-apt-get install lshw lshw -C network configuration Supported interface modes: IBSS managed AP AP/VLAN WDS monitor mesh point apt-get install hostapd iface wlan0 inet static address 10.0.0.1 netmask 255.255.255.0 DAEMON_CONF="/etc/hostapd/hostapd.conf" # First we configure the interface we'll be listening on interface=wlan0 # The interface to listen on driver=nl80211 # The driver that is being used by the WiFi adapter, this could be different for everyone ctrl_interface=/var/run/hostapd ctrl_interface_group=0 # These 2 are just parameters so that the hostap daemon runs. # Now onto the important WiFi configuration ssid=RaspAP # First up, the SSID or Network name. This is what other devices will see when they try to connect. hw_mode=g # I'm setting this to Wireless G mode. A, B, and G are available here. channel=8 # This is setting the channel that the WiFi is on, valid channels are from 1-11, or 1-14 depending on location. # Wifi Security Settings wpa=2 # This sets the security settings to WPA2 wpa_psk=928519398acf811e96f5dcac68a11d6aa876140599be3dd49612e760a2aaac0e # The line above sets the wpa passphrase to "raspiwlan", this is obtained via the wpa_passphrase command. # However, you can also set a passphrase like the line below. #wpa_passphrase=raspiwlan wpa_key_mgmt=WPA-PSK wpa_pairwise=CCMP rsn_pairwise=CCMP # I've set these to WPA-PSK to indicate that we are using a Pre-Shared Key with CCMP encryption. # Otherwise, hostapd also has a built in RADIUS server that we can use for authentication # But I'll leave that to another post. # Other settings beacon_int=100 # This sets how often the WiFi will send a beacon out. auth_algs=3 wmm_enabled=1
List of the best Arduino and Raspberry Pi projects you should know about
With these projects you will achieve independence from a computer and take portability to another level, let's look at some of the projects you can work on:
Octoprint.org
It is an open source software that is mainly used to control 3D printers. Incidentally, most of them are built on or based on Arduino boards. However, the more expensive commercial machines have features like remote control and wireless connectivity that the more basic ones lack. That's why adding a Raspberry Pi board to the control system is one of the most popular projects among makers.
This allows Manage printing wirelessly via the webFurthermore, it's possible to control a printer farm (multiple machines in one location) from a single computer. Raspberry Pi offers the possibility of connect webcams that monitor the work on the manufacturing lineYou can find the codes and all the necessary additional information on the official OctoPrint website.
Surveillance camera with motion sensor
Home security systems are usually very expensive to purchase. Add to that the monthly maintenance costs. But Thanks to Arduino and Raspberry Pi, it is possible to create your own low-cost circuit.
We have seen that it is possible Connecting a webcam to a Raspberry Pi boardThere are also adapters available for using several of them simultaneously. But this is very basic. What happens if you add an element that will enhance the security circuit even further? For example, motion sensors connected to an Arduino. This way you can tell a specific camera to activate when it detects movement in a certain place. It will also send an alert to your mobile phone when you are not at home.
Check out these codes you can practice:
rom picamera import PiCamera import time import cv2 # Initialize the camera with 640x480 resolution camera = PiCamera() resolution = (640, 480) framerate = 32 rawCapture = PiRGBArray(camera, size=(640, 480)) # Waiting time for the camera to start sleep(0.5) # Initialize the first frame to empty. # This will help us obtain the background background = None # We capture frame by frame from the camera for frame in camera.capture_continuous(rawCapture, format="bgr", use_video_port=True): # We obtain the array in NumPy format image = frame.array # We convert to grayscale gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) # We apply smoothing to remove noise gray = cv2.GaussianBlur(gray, (21, 21), 0) # If we haven't obtained the background yet, we obtain it # It will be the first frame we obtain if background is None: background = gray # Calculation of the difference between the background and the current frame subtraction = cv2.absdiff(background, gray) # We apply a threshold threshold = cv2.threshold(subtraction, 25, 255, cv2.THRESH_BINARY)[1] # We dilate threshold to fill holes threshold = cv2.dilate(threshold, None, iterations=2) # We copy the threshold to detect contours contoursimg = threshold.copy() # We search for contours in the image contours, hierarchy = cv2.findContours(contoursimg,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE) # We traverse all the contours found for c in contours: # We eliminate the smallest contours if cv2.contourArea(c) < 500: continue # We obtain the bounds of the contour, the larger rectangle that encompasses the contour (x, y, w, h) = cv2.boundingRect(c) # We draw the bounds rectangle rectangle(image, (x, y), (x + w, y + h), (0, 255, 0), 2) # We show the different captures imshow("Motion Image", image) imshow("Threshold", threshold) imshow("Subtraction", subtraction) imshow("Contours", contoursimg) key = cv2.waitKey(1) & 0xFF # Reset the raw file for the next capture truncate(0) # Exit the application with the letter s if key == ord("s"): break
Arduino joystick for playing games on Raspberry Pi via Scratch
Is A very fun way to practice your programming and put it to the testEspecially if you're interested in video games. Thanks to Scratch which is a programming language designed to develop skills in this area in children and teenagers who are just starting out.
Through a more didactic and visual interface, it's possible create simple codes and even full games. Using Raspberry Pi as the physical platform where the game will take place, connected to a Arduino-based joystickDue to the low cost of accessories such as modules, it is a great alternative to get started in this world.
Enter these codes:
f#include #define Joystick_ joystick; void setup() { pinMode(2,INPUT_PULLUP); pinMode(3,INPUT_PULLUP); begin(); // To use the joystick, analog pins of the X and Y axis of the Joystick and through Joystick.h void loop() { joystickDerX = analogRead(A0); joystick setRxAxis(joystickDerX); joystickDerY = analogRead(A1); joystick setRyAxis(joystickDerY); } for(int i = 2; i<=buttons; i++) { if(digitalRead(i) == LOW) { pressButton(i-2); } else { releaseButton(i-2); } delay(10); }
