NetPad 1.4 - Google Play

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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...

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 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)) error("ERROR on binding");

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

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

float tmp1 = (float)buffer[0];

tmp1 -= 256;

float tmp2 = (float)buffer[1];

tmp2 -= 256;

float tmp3 = (float)buffer[2];

tmp3 -=256;

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

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Previous Versions

Here you can find the changelog of NetPad since it was posted on our website on 2016-10-13 20:16:42. The latest version is 1.4 and it was updated on 2024-04-22 16:27:47. See below the changes in each version.

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Related Apps

Here you can find apps that are similar with NetPad.

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