NetPad

NetPad Free App

Rated 4.00/5 (4) —  Free Android application by Ferdinand Stueckler

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About NetPad

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

3 positions are handled either as text or bytes.

The range of the values x,y (1. control) and z (2. control) are between -100 and 100.

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

The purpose of the app is to control remote hardware like Arduino, Netduino, Raspberry Pi ...

V1.1:
- Changed default mode
- Session to hold connection
V1.2:
- Tablet modifications
V1.3:
- Zero: Auto return to zero values on/off
- Remember last settings
V1.4
- Improved TCP/IP connection

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 %dn",(int)tmp1,(int)tmp2,(int)tmp3);
}
close(newsockfd);
}
close(sockfd);
return 0;
}

How to Download / Install

Download and install NetPad version 1.4 on your Android device!
Downloaded 100+ times, content rating: Everyone
Android package: com.ip.netpad, download NetPad.apk

All Application Badges

Free
downl.
Android
2.2+
For everyone
Android app

App History & Updates

Version update NetPad was updated to version 1.4
Version update NetPad was updated to version 1.3
Version update NetPad was updated to version 1.2
More downloads  NetPad reached 100 - 500 downloads

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Rating Distribution

RATING
4.05
4 users

5

4

3

2

1