How to pass information into a custom data type

Projects Programming
1

First off, I apologize if I'm not using the right C / C++ nomenclature. It's just what was able to stick with me.

I'm trying to use the newly redesigned ICMPPing.h to ping an address that I put in from a keypad. The information is available as a string ("192.168.1.100") or as a byte array ([192],[168],[1],[100]). In the example given, there is this line:

IPAddress pingAddr(192,168,1,100);

I tried reading through the header file and I think it's a little-endian uint32_t data type. I've tried a number of items, but I seem to have the most promise with something like this:

IPAddress pingAddr(NewIP[0], NewIP[1], NewIP[2], NewIP[3]);

However, I get this error:

error: expected unqualified-id before numeric constant

How can I pass manual data to this header?

2

Second post in this section...

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3

Sorry. I've attached the code rather than inlined it because of the size.

KeypadPing2.ino (10.5 KB)

4

Update:
I have figured out how to put information into the "IPAddress" class. I had to convert it to an integer, using a "union" statement:

union ArrayToInteger {
  byte array[4];
  uint32_t integer;
};

followed by:

  ArrayToInteger converter;
  converter.array[0] = NewIP[0] ; 
  converter.array[1] = NewIP[1] ; 
  converter.array[2] = NewIP[2] ; 
  converter.array[3] = NewIP[3] ;

So, the good news is that part works. It also takes keypad input, which is better. However, I still get the following error:

In file included from C:\Program Files (x86)\Arduino\libraries\ICMPPing/ICMPPing.h:12,
                 from KeypadPing3.ino:16:
C:\Program Files (x86)\Arduino\libraries\Ethernet/utility/w5100.h:98: error: expected unqualified-id before numeric constant

The lines of code that actually do the pinging are copied & pasted from the example, so I know they work.

KeypadPing3.ino (7.61 KB)

5 
KeypadPing3.ino:5:20: warning: Keypad.h: No such file or directory
KeypadPing3.ino:16:22: warning: ICMPPing.h: No such file or directory

Links to libraries?

6

While not related to the error, this:

ArrayToInteger converter; //Create a converter

  converter.array[0] = NewIP[0] ; //save something to each byte in the array
  converter.array[1] = NewIP[1] ; //save something to each byte in the array
  converter.array[2] = NewIP[2] ; //save something to each byte in the array
  converter.array[3] = NewIP[3] ; //save something to each byte in the array

IPAddress pingAddr(converter.integer);

Could be written as:

ArrayToInteger converter  = {{NewIP[0] ,NewIP[1] ,NewIP[2] ,NewIP[3] }}; //Create a converter
IPAddress pingAddr(converter.integer);

Or even just:
IPAddress pingAddr(NewIP); // "IPAddress::IPAddress(const uint8_t *address)"

7

Original announcement: http://forum.arduino.cc/index.php/topic,161155.0.html

Github repository: GitHub - BlakeFoster/Arduino-Ping: ICMP ping library for the Arduino

And I need to stop posting after 2200. I keep forgetting stuff. :slight_smile:

8

I will test this in a few hours. My whole codebase is a mess, and I'm sure it would give any proper programmer fits. But, if it's ugly and works, it's not so ugly. :wink:

9 
KeypadPing3.ino:5:20: warning: Keypad.h: No such file or directory

Link to library?

10

http://playground.arduino.cc/uploads/Code/keypad.zip

11

I also figured out what I did wrong. At one point I created a byte array for the IP address, but it didn't work. When I changed it to an int array, it passed the information successfully.

12

FTPMonster:
I also figured out what I did wrong.

You no longer need help with this?