Hey guys,
I'm working on a project parsing XML data from a website (http://www.ivb.at/smartinfo/ivb_smartinfo_kernel.php?olifServerId=84&autorefresh=20&default_autorefresh=20&routeId=&stopId=Breitweg&optDir=-1&nRows=4&showArrivals=n&optTime=now&time=&allLines=y&app=sionline).
The code looks like this:
#include <SPI.h>
#include <string.h>
#include <Ethernet.h>
#include "HT1632.h"
#define MAX_STRING_LEN 20
#define DATA 2
#define WR 3
#define CS 4
#define CS2 5
#define CS3 6
#define CS4 7
HT1632LEDMatrix matrix = HT1632LEDMatrix(DATA, WR, CS, CS2, CS3, CS4);
char tagStr[MAX_STRING_LEN] = "";
char dataStr[MAX_STRING_LEN] = "";
char tmpStr[MAX_STRING_LEN] = "";
char endTag[3] = {
'<', '/', '\0'};
int len;
boolean tagFlag = false;
boolean dataFlag = false;
byte mac[] = {
0x90, 0xA2, 0xDA, 0x0D, 0x52, 0xBD };
byte ip[] = {
192, 168, 2, 3 };
byte server[] = {
83, 175, 126, 90 };
EthernetClient client;
void setup()
{
Serial.begin(9600);
matrix.begin(HT1632_COMMON_16NMOS);
Serial.println("Starting IVB.at");
Serial.println("connecting...");
Ethernet.begin(mac, ip);
delay(0);
if (client.connect(server, 80)) {
Serial.println("connected");
client.println("GET /smartinfo/ivb_smartinfo_kernel.php?olifServerId=84&autorefresh=20&default_autorefresh=20&routeId=&stopId=Absam%20Dorf&optDir=-1&nRows=4&showArrivals=n&optTime=now&time=&allLines=y&app=sionline HTTP/1.0");
client.println("Host: www.ivb.at");
client.println();
delay(10);
}
else {
Serial.println("connection failed");
matrix.clearScreen();
matrix.setTextSize(1);
matrix.setTextColor(1);
{
matrix.setCursor(0, 0);
matrix.print("Bitte beachten");
matrix.setCursor(0, 8);
matrix.print("Fahrplan");
matrix.writeScreen();
}
delay(100);
}
}
void loop() {
// Read serial data in from web:
while (client.available()) {
serialEvent();
}
if (!client.connected()) {
//Serial.println();
//Serial.println("Disconnected");
client.stop();
// Time until next update
//Serial.println("Waiting");
for (int t = 1; t <= 15; t++) {
delay(1000); // 1 minute
}
if (client.connect(server, 80)) {
//Serial.println("Reconnected");
client.println("GET /smartinfo/ivb_smartinfo_kernel.php?olifServerId=84&autorefresh=20&default_autorefresh=20&routeId=&stopId=Absam%20Dorf&optDir=-1&nRows=4&showArrivals=n&optTime=now&time=&allLines=y&app=sionline HTTP/1.0");
client.println("Host: www.ivb.at");
matrix.clearScreen();
client.println();
delay(0);
}
else {
Serial.println("Reconnect failed");
}
}
}
// Process each char from web
void serialEvent() {
// Read a char
char inChar = client.read();
//Serial.print(".");
if (inChar == '<') {
addChar(inChar, tmpStr);
tagFlag = true;
dataFlag = false;
}
else if (inChar == '>') {
addChar(inChar, tmpStr);
if (tagFlag) {
strncpy(tagStr, tmpStr, strlen(tmpStr)+1);
}
// Clear tmp
clearStr(tmpStr);
tagFlag = false;
dataFlag = true;
}
else if (inChar != 10) {
if (tagFlag) {
// Add tag char to string
addChar(inChar, tmpStr);
// Check for </XML> end tag, ignore it
if ( tagFlag && strcmp(tmpStr, endTag) == 0 ) {
clearStr(tmpStr);
tagFlag = false;
dataFlag = false;
}
}
if (dataFlag) {
// Add data char to string
addChar(inChar, dataStr);
}
}
// If a LF, process the line
if (inChar == 10 ) {
/*
Serial.print("routeStr: ");
Serial.println(directionStr);
Serial.print("directionStr: ");
Serial.println(directionStr);
*/
// Find specific tags and print data
if (matchTag("<time>")) {
Serial.print(" Abfahrt: ");
Serial.print(dataStr);
String stringOne = dataStr;
Serial.println(stringOne);
String stringTwo = stringOne;
stringTwo.replace("min","'");
stringTwo.replace(":","");
matrix.setTextSize(1);
matrix.setTextColor(1);
{
matrix.setCursor(24, 0);
matrix.println(stringTwo);
matrix.writeScreen();
}
}
if (matchTag("<direction>")) {
Serial.print(" Ziel: ");
Serial.print(dataStr);
String reportString = dataStr;
char mostSignificantDigit = reportString.charAt(0);
matrix.setTextSize(1);
matrix.setTextColor(1);
{
matrix.setCursor(16, 0);
matrix.println(mostSignificantDigit);
matrix.writeScreen();
}
}
if (matchTag("<route>")) {
Serial.print(" Linie: ");
Serial.print(dataStr);
matrix.setTextSize(1);
matrix.setTextColor(1);
{
matrix.setCursor(0, 0);
matrix.print(dataStr);
matrix.writeScreen();
}
}
// Clear all strings
clearStr(tmpStr);
clearStr(tagStr);
clearStr(dataStr);
// Clear Flags
tagFlag = false;
dataFlag = false;
}
}
/////////////////////
// Other Functions //
/////////////////////
// Function to clear a string
void clearStr (char* str) {
int len = strlen(str);
for (int c = 0; c < len; c++) {
str[c] = 0;
}
}
//Function to add a char to a string and check its length
void addChar (char ch, char* str) {
char *tagMsg = "<TRUNCATED_TAG>";
char *dataMsg = "-TRUNCATED_DATA-";
// Check the max size of the string to make sure it doesn't grow too
// big. If string is beyond MAX_STRING_LEN assume it is unimportant
// and replace it with a warning message.
if (strlen(str) > MAX_STRING_LEN - 2) {
if (tagFlag) {
clearStr(tagStr);
strcpy(tagStr,tagMsg);
}
if (dataFlag) {
clearStr(dataStr);
strcpy(dataStr,dataMsg);
}
// Clear the time buffer and flags to stop current processing
clearStr(tmpStr);
tagFlag = false;
dataFlag = false;
}
else {
// Add char to string
str[strlen(str)] = ch;
}
}
// Function to check the current tag for a specific string
boolean matchTag (char* searchTag) {
if ( strcmp(tagStr, searchTag) == 0 ) {
return true;
}
else {
return false;
}
}
The code works pretty good when i print the strings in the serial monitor - i get 4 rows of data:
Linie: D Ziel: Abfahrt: 2 min
Linie: E Ziel: Abfahrt: 16 min
Linie: D Ziel: Abfahrt: 16 min
Linie: D Ziel: Abfahrt: 10:51
But when I print the data on my LED matrix, I just get one row of data and not four rows (Photo1).
Has anyone an idea how to 'split' the string?
(e.g. String 1:
D
Kurhaus
9 min
,
String 2:
D
Hauptbahnhof
09:49
)
Thanks!
