Aim
Block Diagram
Working
Advantages
App Features
App Block Code
Data Graph on Ubidots
Applications
Limitations
Demo Video

Dr. Umesh Dutta, Himanshu Sinha, Deepak Singh, Drishti dua, riya raina, Kajol Thakur, Texas Instruments University Program, Energia, devdutt

Published June 26, 2019 © GPL3+

Grass Cutter Robot

An Internet-controlled robot that can cut the grass of a garden area with ease and efficiently.

AdvancedFull instructions provided2 days7,958

Things used in this project

Story

Aim:

To design a grass-cutting robot that can be controlled through the Internet.

Block Diagram:

block diagram

Working:

We are controlling a grass cutter robot using internet and it also contains voice control system. We have developed the mobile application which send commands to the UBIDOTS server. MSP432 LaunchPad reads the data from the server using WiFi Booster Pack. The motor movement and different direction is governed by the program which is loaded to the launchpad credit.

The movement of robot is controlled keeping in view the following points:

❖ Variable1 : Forward

❖ Variable2 : Backward

❖ Variable3 : Left

❖ Variable4 : Right

❖ Variable5 : Stop

Advantages:

❖ It contains a voice control system.

❖ It requires low maintenance.

❖ It is environment friendly as it contains battery instead of fossil fuels.

❖ It is safer to use because if any mishap occurs we can quickly give command to stop the robot.

❖ Now we are safety with no pollutants emitted.

❖ It will work via app as it does not need any gardener to cut the grass manually.

❖ The cost of electricity to recharge the battery is minimal compared to the high

cost of fossil fuels.

❖ Has less moving parts

❖ Less space required.

App Features:

❖Build our own application which contain forward, backward, left, right buttons.

❖It also contain stop cutter, start cutter, stop robot buttons.

❖Voice module from MIT app inventor.

app layout

App Block Code:

app block code (1st part)

app block code (2nd part)

Data Graph on Ubidots:

data received on server from app

Applications:

❖ It is used for household purposes like designing terrace garden, park etc.

❖ It is used for commercial purposes for designing lawns.

❖ It is used in agricultural fields to cut crops and grasses.

Limitations:

❖ We need to modify robot (i.e. wheels) to operate in farms because the surface is

uneven.

❖ We can use solar energy panels instead of charging batteries.

❖ We have to increase the size of our grass cutter robot for farms, etc.

Demo Video:

robot control

#ifndef __CC3200R1M1RGC__
// Do not include SPI for CC3200 LaunchPad
#include <SPI.h>
#endif
#include <WiFi.h>

//define the pins to be connected to ultrasonic sensorw
//define the pins to be connected to ultrasonic sensor

#define LeftMotor1  24
#define LeftMotor2  25

#define RightMotor1 26

#define RightMotor2 27

#define CUTTER 28

char ssid[] = "UNKNOWN WIFI";
char password[] = "rajsinha123";

const int HTTPPORT = 80;
char * USER_AGENT = "TI";
char * VERSION = "1.0";
char * server = "industrial.api.ubidots.com";
char* TOKEN = "BBFF-rSICR8dcv40GP01Nl1iklcEVcN7tNj"; // Put here your TOKEN

char* DEVICE_LABEL = "autobot"; // Your Device label

/* Put here your variable's labels*/
char const * VARIABLE_LABEL = "autobot";
WiFiClient client;

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(115200);

  // attempt to connect to Wifi network:
  Serial.print("Attempting to connect to Network named: ");
  // print the network name (SSID);
  Serial.println(ssid); 
  // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
  WiFi.begin(ssid, password);
  while ( WiFi.status() != WL_CONNECTED) {
    // print dots while we wait to connect
    Serial.print(".");
    delay(300);
    pinMode(LeftMotor1,  OUTPUT);

  pinMode(LeftMotor2,  OUTPUT);

  pinMode(RightMotor1, OUTPUT);

  pinMode(RightMotor2, OUTPUT);

  
  }
  
  Serial.println("\nYou're connected to the network");
  Serial.println("Waiting for an ip address");
  
  while (WiFi.localIP() == INADDR_NONE) {
    // print dots while we wait for an ip addresss
    Serial.print(".");
    delay(300);
  }

 
}


void loop() {
   if (client.connect(server, 80)) {
    client.print(F("GET /api/v1.6/devices/"));
    client.print(DEVICE_LABEL);
    client.print(F("/"));
    client.print(VARIABLE_LABEL);
    client.print(F("/lv"));
    client.print(F(" HTTP/1.1\r\n"));
    client.print(F("Host: "));
    client.print(server);
    client.print(F("\r\n"));
    client.print(F("User-Agent: "));
    client.print(USER_AGENT);
    client.print(F("/"));
    client.print(VERSION);
    client.print(F("\r\n"));
    client.print(F("X-Auth-Token: "));
    client.print(TOKEN);
    client.print(F("\r\n"));
    client.print(F("Content-Type: application/json\r\n\r\n"));
    client.println();
    
}
  String s="";
  bool a=false;
  char movement='5';
  while (client.available()) {
    char c = client.read();
    s=s+c;
    a=true;
  }

  Serial.println(s);
   movement = get_movement(s);
   Serial.println(movement);
 
  if(a==true){
      client.stop();
      a=false;
  }
 
  if(movement=='1'){    //Forward

  digitalWrite(LeftMotor1, HIGH);

  digitalWrite(LeftMotor2, LOW);

  digitalWrite(RightMotor1, HIGH);

  digitalWrite(RightMotor2, LOW);

  
  }
  else if(movement=='2'){ //Backward

  digitalWrite(LeftMotor2, HIGH);

  digitalWrite(LeftMotor1, LOW);

  digitalWrite(RightMotor2, HIGH);

  digitalWrite(RightMotor1, LOW);

    }
  else if(movement=='3'){ //left
    
  digitalWrite(LeftMotor1, HIGH);

  digitalWrite(LeftMotor2, LOW);

  digitalWrite(RightMotor1, LOW);

  digitalWrite(RightMotor2, LOW);

  }
  else if(movement=='4'){ //Right
  
  digitalWrite(LeftMotor1, LOW);

  digitalWrite(LeftMotor2, LOW);

  digitalWrite(RightMotor1, HIGH);

  digitalWrite(RightMotor2, LOW);
  }
  else if(movement=='5'){ //stop
  digitalWrite(LeftMotor1, LOW);

  digitalWrite(LeftMotor2, LOW);

  digitalWrite(RightMotor1, LOW);

  digitalWrite(RightMotor2, LOW);
  }
   else if(movement=='6')
  digitalWrite(CUTTER , HIGH);
   
    else if(movement=='7')
    digitalWrite(CUTTER , LOW);
 
 }


void printWifiStatus() {
  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}


char get_movement(String a){
  int endi =0;
  int i;
  for(i=0;i<a.length();i++){

    if(a.charAt(i)=='\n'){
      endi++;
    }
    if(endi==10){
      break;
    }
  }
  return a.charAt(i+1);
  
}