Ardumote HD coding hardships

Projects Programming
1

Hello everyone,

I downloaded the iPad app "Ardumote HD" (www.SamratAmin.com/Ardumote.html) and picked up an ethernet shield. I would like to use my iPad to light an LED connected to pin 2 on my Uno. The ethernet shield is plugged into the ethernet port of my laptop, which is on a public wifi network with the iPad.

Almost immediately I hit a roadblock. Going to the Ardumote tutorial website (http://samratamin.com/Ardumote_Tutorial.html) I was quick to discover the link to the example code... isn't even a link at all! Scouring the web for another instance of the code, I stumbled across a post that contained a version of it by luck.

Inputting the code, it wouldn't compile (of course, lol) At first it said "in version 1.0 UDP was changed to EthernetUDP"

So I changed the line that contained udp to EthernetUDP, and I also loaded the ethernet library at the top because it wasn't there originally.

NOW it's saying "Expected unqualified-id before "." token" and I am unsure of how to rectify the situation. It highlights the line "EthernetUDP.begin(localPort);" as the issue, which is the same line I changed from Udp to EthernetUDP. Any help will be greatly appreciated!

Here is what I have right now:

#include <Dhcp.h>
#include <Dns.h>
#include <Ethernet.h>
#include <EthernetClient.h>
#include <EthernetServer.h>
#include <EthernetUdp.h>
#include <util.h>

#include <SPI.h>
#include <Udp.h>

byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0xDB, 0x50 };
byte ip[] = { 169,254,130,77 };
//byte gateway[] = { 192,168,0,1 };
//byte subnet[] = { 255,255,255,0 };

unsigned int localPort = 7777;

IPAddress iPhoneIP(192.168.252.156);
unsigned int iPhonePort = 7777;


int LED_Pin = 2;

byte remoteIp[4];
unsigned int remotePort;

char packBuff[UDP_TX_PACKET_MAX_SIZE];



void setup() {
Ethernet.begin(mac,ip);
EthernetUDP.begin(localPort);  //This is where the program is identifying a problem
Serial.begin(9600);
pinMode(LED_Pin,OUTPUT);
}

void loop() 
{
int pwmVal;
int packetSize = Udp.available();  //should I change this one to EthernetUDP as well?
if(packetSize)
  {
    packetSize = packetSize - 8;
    Serial.print("Packet size: ");
    Serial.println(packetSize);

    Udp.readPacket(packBuff,UDP_TX_PACKET_MAX_SIZE, remoteIp, remotePort);  //does this need EthernetUDP too?
    Serial.println("Message: ");
    Serial.println(packBuff);

    pwmVal = (packBuff[3] - '0')*100 + (packBuff[4] - '0')*10 + (packBuff[5] - '0');

    if (packBuff[0] = 'P' && packBuff[1]=='W' && packBuff[2]=='M')  
      analogWrite(LED_Pin,pwmVal);
      Serial.println("PWM on Pin 2");
    }

    else if (packBuff[0] = 'P' && packBuff[1]=='2' && packBuff[2]=='H')
      digitalWrite(LED_Pin,HIGH);
      Serial.println("LED ON");

    else if (packBuff[0] = 'P' && packBuff[1]=='2' && packBuff[2]=='L')
    {
      digitalWrite(LED_Pin,LOW);
      Serial.println("LED OFF");
    }   
  }
  delay(20);
}
2 
IPAddress iPhoneIP(192.168.252.156);

That isn't how you define an IPAddress. Did you look at the Ethernet examples?

NOW it's saying "Expected unqualified-id before "." token" and I am unsure of how to rectify the situation. It highlights the line "EthernetUDP.begin(localPort);" as the issue, which is the same line I changed from Udp to EthernetUDP. Any help will be greatly appreciated!

Why? That wasn't what the error message told you to do.

3

That isn't how you define an IPAddress

Ah yes- I just didn't see that I had typed it in like that. Old habits die hard.

That wasn't what the error message told you to do

The original error message did:

At first it said "in version 1.0 UDP was changed to EthernetUDP"

UPDATE:
I Emailed the Ardumote creator, and within two minutes he emailed me back the new code! It is MUCH better, but I now have new hurdles. I'll probably make a new post, because they are completely different issues. Thanks for reading :slight_smile: