Published August 10, 2021 © GPL3+

A robot friend

This is a project about a robot made for people who feel lonely.

BeginnerFull instructions provided1 hour2,544

Things used in this project

Hardware components

Arduino MKR WiFi 1010

SparkFun Ultrasonic Sensor - HC-SR04

SG90 Micro-servo motor

Software apps and online services

Arduino IDE

Blynk

Hand tools and fabrication machines

cardboard

Tape, Scotch

Story

I often feel alone so I've created this cardboard companion robot.

It is based on an Arduino MKR1010 WiFi and it is very simple to do.

I've post the video on my TikTok account https://vm.tiktok.com/ZMdKqHrwm/

and the it was shared also from the official Instagram account of Arduino!

Many people start asked me the full sketch and tutorial and so I'm here for this!

TUTORIAL

First of all I've cut the cardboard for the body of the robot and then I've attached the ultrasonic sensor.

Then I've set up the servo in the 90° position with this code and this circuit (sorry there isn't the MKR on Tinkercad)

#include <Servo.h>
Servo servo;
void setup() {
    servo.attach(9);
}
void loop() {
    servo.write(90);
}

After that I've put everything on the cardoard. I attach here some photos but be creative!

After this I've connected also the ultrasonic sensor and I've add some code and the full circuit

#include <Servo.h>
#define trig 11
#define echo 10

Servo servo;

unsigned long durata;
float distanza;

void setup() {
    servo.attach(9);
    pinMode(trig, OUTPUT);
    pinMode(echo, INPUT);
}
void loop() {
    if(distanza < 10){
        for(int j=0; j<2; j++){
        for(int i= 40; i<100; i++){
          servo.write(i);
          delay(10);
        }
        for(int i= 100; i>=40; i--){
          servo.write(i);
          delay(10);
        }
      }
}

Now you have the version 1 of the robot, you can already use it!

VERSION 2

The last step was the Blynk application.

Download Blynk from the app store/play store and create a new app. Use Arduino MKR1010 WiFi how board and WiFi how connection. Then add only a 'notification' item. Go on your mail and take the auth code, then upload the full code.

I hope you can enjoy this project. You can find me on the other social.

Thanks in advance,

Greta

Instagram -- https://instagram.com/_gregalli02

TikTok -- https://tiktok.com/@gretagalli02

Youtube -- https://www.youtube.com/channel/UC2mIDEnDv7f3r5KdhddDhkQ

Code

Full code

#include <Servo.h>
#include <WiFiNINA.h>
#include <SPI.h>
#include <BlynkSimpleWiFiNINA.h>
#define BLYNK_PRINT Serial
#define trig 11
#define echo 10

Servo servo;

char auth[] = "Auth code of your blynk app";


unsigned long durata;
float distanza;

char ssid[] = "ssid of your wifi";
char pass[] = "password of your wifi"; 


void setup() {
  // put your setup code here, to run once:
  servo.attach(9);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  // put your main code here, to run repeatedly:
  Blynk.run();
  
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  durata = pulseIn(echo, HIGH);
  distanza = durata*0.0347/2;
  Serial.println(distanza);
  if(distanza < 10){
    
    Blynk.notify("text on the notification");
    
      for(int j=0; j<2; j++){
        for(int i= 40; i<100; i++){
          servo.write(i);
          delay(10);
        }
        for(int i= 100; i>=40; i--){
          servo.write(i);
          delay(10);
        }
      }
  }
  
}