Hackster is hosting Hackster Holidays, Finale: Livestream & Giveaway Drawing. Watch previous episodes or stream live on Tuesday!Stream Hackster Holidays, Finale on Tuesday!
PAJ
Published © LGPL

Pick to Light Project 2 WiFi

In the second project in my pick to light, I am using WIFI to pass the data between PC and Arduino.

BeginnerFull instructions provided2 hours5,025

Things used in this project

Hardware components

Arduino MKR1000
Arduino MKR1000
×1
LED (generic)
LED (generic)
×2
Jumper wires (generic)
Jumper wires (generic)
×1
Pushbutton switch 12mm
SparkFun Pushbutton switch 12mm
×1
Resistor 10k ohm
Resistor 10k ohm
×1
Resistor 330 ohm
Resistor 330 ohm
×4
Breadboard (generic)
Breadboard (generic)
×1
USB-A to Micro-USB Cable
USB-A to Micro-USB Cable
×1
General Purpose Transistor NPN
General Purpose Transistor NPN
×1

Story

Read more

Schematics

Pick to light UDP Project 2

Connections for the UDP Pick to Light

Code

Arduino sketch

Arduino
The sketch to be loaded to the MKR1000
#include <SPI.h>
#include <WiFi101.h>
#include <WiFiUdp.h>

const int OKbutton = 2; // set the pin for the okay button/switch
const int Bin1 = 8; // the pin that the LED for bin 1 is attached to
const int Bin2 = 9; // the pin that the LED for bin 2 is attached to
String mydata = " ";  // a variable to read incoming serial data into set to empty string
String myseq = " ";
int buttonPress = 0; // a variable to store state of the button/switch

int status = WL_IDLE_STATUS;
#include "arduino_secrets.h" 
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID;        // your network SSID (name)
char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;            // your network key Index number (needed only for WEP)

unsigned int localPort = 2390;      // local port to listen on

char packetBuffer[255]; //buffer to hold incoming packet
char  ReplyBuffer[5] = "   ";       // a string to send back
String mystring;
WiFiUDP Udp;

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600);// all serial statements are not needed once set up
//while (!Serial) {
// wait for serial port to connect. Needed for native USB port only
}

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue:
    while (true);
  }

  // attempt to connect to WiFi network:
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);

    // wait 10 seconds for connection:
    delay(10000);
  }
  Serial.println("Connected to wifi");
  printWiFiStatus();

  Serial.println("\nStarting connection to server...");
  // if you get a connection, report back via serial:
  Udp.begin(localPort);

}

void loop() {

  // if there's data available, read a packet
  int packetSize = Udp.parsePacket();
  if (packetSize)
  {
    Serial.print("Received packet of size ");
    Serial.println(packetSize);
    Serial.print("From ");
    IPAddress remoteIp = Udp.remoteIP();
    Serial.print(remoteIp);
    Serial.print(", port ");
    Serial.println(Udp.remotePort());

    // read the packet into packetBufffer
    int len = Udp.read(packetBuffer, 255);
    if (len > 0) packetBuffer[len] = 0;
    Serial.println("Contents:");
    Serial.println(packetBuffer);
    String mystring(packetBuffer);
    mydata = mystring.substring(4);
    myseq = mystring.substring(0,4);
    Serial.println(mydata);
    Serial.println(myseq);
    
       while (mydata != " "){ //Test to see if mydata is still empty if it isn't check which bin should be lit up
      if (mydata == "Bin1"){ // start bin 1 routine
        digitalWrite(Bin1, HIGH); // light LED for bin 1 by setting pin high
        digitalWrite(Bin2, LOW);  // set LED for bin 2 off by setting pin low
            while (buttonPress != HIGH) { // wait for button press loop
              buttonPress = digitalRead(OKbutton); //keep checking button
              mydata = " "; //set mydata back to empty string
    }
        digitalWrite(Bin1, LOW);// turn led for bin 1 off
        Serial.println("Picked"); //send message to PC
        buttonPress = 0; //reset button low
        delay(1000);
      }
      if (mydata == "Bin2"){// start bin 2 routine
        digitalWrite(Bin2, HIGH);// light LED for bin 2 by setting pin high
        digitalWrite(Bin1, LOW); // set LED for bin 1 off by setting pin low
            while (buttonPress != HIGH) { // wait for button press loop
              buttonPress = digitalRead(OKbutton); //keep checking button
              mydata = " "; //set mydata back to emty string
    }
        digitalWrite(Bin2, LOW); // turn led for bin 1 off
        Serial.println("Picked"); //send message to PC
        buttonPress = 0; //reset button low
        delay(1000);
      }
 
    }

    // send a reply, to the IP address and port that sent us the packet we received
    myseq.toCharArray(ReplyBuffer, 5);
    //char ReplyBuffer[5] = "0001"; // for testing only
    Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
    Udp.write(ReplyBuffer);
    Udp.endPacket();
    Serial.println(ReplyBuffer);
  }
}


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");
}

Python Script

Python
Python Script to be run.
## load the necessary libraries
import csv
import socket
import time
import sys

UDP_IP = "192.168.1.119" ## the ip of our Arduino
UDP_PORT = 2390 ## the port we wish to communicate on

print("UDP target IP:", UDP_IP) ## display ip to user
print("UDP target port:", UDP_PORT) ## display port to user

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # create a socket


time.sleep(5)
##open csv file and read it in one line at a time
with open('sequence1.txt') as csvDataFile: 
    csvReader = csv.reader(csvDataFile)
    for row in csvReader: ##for each line do the following
        myseq = row[0] ##read in the sequence number
        mystate = row[1] ##read in the bin number
        myrow = row[0] + row[1]
        print("Current sequence being picked ",myseq,"from ", mystate)
        sock.sendto(bytes(myrow, "utf-8"), (UDP_IP, UDP_PORT)) # send seq and bin number
        data = "" # set data to blank to enter while loop i=until data is received
        while data == "": # until data is received keep looping through
            (data, addr) = sock.recvfrom(1024) # set data to data received from socket
            mytest = data.decode( "utf-8") #set mytest to equal value received over socket
            print ("picked = ", mytest) # print the value received
            if mytest != myseq: # test what has ben received matches what was expected i.e. last seq sent
                print ("there is a sequence fault at sequence", mytest) # display message to indicate a fault
                sys.exit() #end program execution if fault exists

Sequence

Plain text
Sequence file for the python program
0001,Bin1
0002,Bin2
0003,Bin1
0004,Bin2
0005,Bin1
0006,Bin2
0007,Bin1
0008,Bin2
0009,Bin1
0010,Bin2
0011,Bin1
0012,Bin2
0013,Bin1

Credits

PAJ
3 projects • 7 followers

Comments

Related channels and tags
  • Arduino
  • SparkFun