NetSimple - Google Play

Free Version

Disclaimer
Description

Official Google Play Link

We do not host NetSimple on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.

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Publisher Description

NetSimple -
Network Remote Control for sending positional information to microcontroller.

The purpose of the app is to control remote hardware like Arduino, Netduino, Raspberry Pi ...
The protocol is TCP / IP (Client).

UP: 0, power, 0
DOWN: 0, -power, 0
LEFT: -power, power, 0
RIGHT: power, power, 0
MIDDLE: 0, 0, 0 or 0, 0, power (Zero active)

Byte Mode: 3 positions are transfered as 3 bytes (default)
ASCII mode: 3 positions are transfered as text seperated by comma (ended by \ n)
Session inactive: Each transmission in a Serated connection
Session active: Connection never closed, but if Necessary automatic reconnect (default)
Zero inactive: No return to zero values after release
Zero active: Auto return to zero values after release

Sample code for a server on Raspberry Pi:

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "unistd.h"
#include "sys / types.h"
#include "sys / socket.h"
#include "netinet / in.h"

void error (const char * msg)
{
    perror (msg);
    exit (1);
}

int main (int argc, char * argv [])
{
    int sockfd, newsockfd, portno, n;
    socklen_t clilen;
    char buffer [256];
    struct sockaddr_in serv_addr, cli_addr;

    sockfd = socket (AF_INET, SOCK_STREAM, 0);
    if (sockfd <0)
         error ( "ERROR opening socket");

    bzero ((char *) & serv_addr, sizeof (serv_addr));
    portno = 12345;

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = INADDR_ANY;
    serv_addr.sin_port = htons (portno);
    if (bind (sockfd, (struct sockaddr *)
           & Serv_addr, sizeof (serv_addr)) <0)
                error ( "ERROR on binding");

    while (1)
    {
         listen (sockfd, 5);
         clilen = sizeof (cli_addr);
         newsockfd = accept (sockfd, (struct sockaddr *)
               & Cli_addr, & clilen);
         if (newsockfd <0)
               error ( "ERROR on accept");

         while (1)
         {
               bzero (buffer, 256);
               n = read (newsockfd, buffer, 3);
               if (n <3)
               {
                     error ( "ERROR reading from socket");
                     break;
               }

               float tmp1 = (float) buffer [0];
               if (tmp1> 127)
                     tmp1 - = 256;

               float tmp2 = (float) buffer [1];
               if (tmp2> 127)
                      tmp2 - = 256;

               float TMP3 = (float) buffer [2];
               if (TMP3> 127)
                      TMP3 - = 256;

               printf ( "% d% d% d \ n", (int) tmp1, (int) tmp2, (int) TMP3);
         }
         close (newsockfd);
     }
     close (sockfd);
     return 0;
}