Problem with 3 Serial Ports on UNO

hi all,

i wrote wrapper aprs modem/bertos firmware ( http://unsigned.io/microaprs/ ) ...
the arduino wrapper located @ https://github.com/stanleyseow/arduinotracker-microaprs

i wanted write similar radio shield 2  https://www.argentdata.com/catalog/product_info.php?products_id=136 open source ...

i needed 3 serial port following functions :-

pin 0,1 ( 9600) - connect aprs modem send commands , received decoded aprs packets radio
pin 2,3 (9600) - connect gps module gps coordinates ( softwareserial )
pin 8,9 (57600) - connect ftdi serial usb module debugging , send in commands purposes...

- pin 8,9 using altsoftserial http://www.pjrc.com/teensy/td_libs_altsoftserial.html

things not working (yet) :-

- not copied entire decoded aprs packet string or char array

i want display callsign ( string after src: )  , data: on 20x4 lcd not grab entire row or partial of sample string below..

i suspect there many calls other serial port ( e.g. gps on software serial or debug ) , therefore blocking this..

how shall solve serial port issue 3 serial ports running @ same time...

thanks

stanley



the output of decoded messages aprs modem below :-

code: [select]


src: [9w2bbb-12] path: [9m2kkk-3] [wide1-1] [wide2-2] data: !/lq@yh1usp?dg/a=000273 13.6v 32caprs
src: [9m2ccc-3] path: [wide2-1] data: !/lqluh1'q# st 11.8v  33c maaas vhf 144.3900mhz
src: [9w2aaa-0] path: [9m4rrr-3] [9m2ttt-1] [9m2kkk-3] [wide1-0] data: @050418z0300.35n/000004.61ez
src: [9m2kkk-3] path: [wide2-1] data: !/lqluh1'q# st 11.8v  33c maaas vhf 144.3900mhz


the decodeaprs functions, entire source codes @ github url stated above ...

code: [select]


void decodeaprs() {
      char c;
      char endchar = '\n';
      char endchar2 = '\r';
      boolean storestring = true;
      char callsign[12];
      char path[60];
      char data[100];

      debug.println();
      debug.print("entering decodeaprs (");
      debug.print(millis());
      debug.println(")");
      while ( serial.available() > 0 ) {
         c = serial.read();
         // debugging
         debug.print(c);
         
         // if maxbuffer reach, null terminate string
         if ( bufferindex > maxbuffer ) {
               charbuffer[maxbuffer] = 0;
               storestring = false;         
         }
         
         // check endchar , null terminate string
         if ( c == endchar || c == endchar2 ) {
             charbuffer[bufferindex] = 0;
             storestring = false;   
         }
         
         if ( storestring ) {
              charbuffer[bufferindex++] = c;
         }
      }
     
      // save buffers strings if charbuffer not blank
      if ( !storestring  && (!charbuffer[0] == 0) ) {
            inbuffer = charbuffer;
      }
     
      if ( inbuffer != "" && !storestring ) {
        debug.println();
        debug.print("rf(");
        debug.print(inbuffer.length());
        debug.print("):");
        debug.println(inbuffer);
       
        // check first 3 char src
        if ( inbuffer.substring(0,3) == "src" ) {
     
        int firstbracket = inbuffer.indexof('[');  // in between [ , ] callsign & ssid
        int secondbracket = inbuffer.indexof(']');

        //int secondcolon = inbuffer.indexof(':',secondbracket+1); 
        int secondcolon = secondbracket+6;
        // not use lastindexof messaging uses :
        int thirdcolon = inbuffer.indexof(':',secondcolon+1);
       
        // callsign
        string decoded2 = inbuffer.substring(firstbracket+1,secondbracket); // substring callsign
        decoded2.tochararray(callsign,secondbracket+1-firstbracket-1);      // convert char array
       
        // path
        string decoded3 = inbuffer.substring(secondcolon+2,thirdcolon-5);
        decoded3.tochararray(path,decoded3.length()+1);
       
        // data
        string decoded4 = inbuffer.substring(thirdcolon+2,inbuffer.length());
        decoded4.tochararray(data,decoded4.length()+1);

        debug.print("callsign (");
        debug.print(strlen(callsign));
        debug.print("):");
        debug.println(callsign);   
             
        debug.print("path (");
        debug.print(strlen(path));
        debug.print("):");
        debug.println(path);   

        debug.print("data (");
        debug.print(strlen(data));
        debug.print("):");
        debug.println(data);   
       
        lcd.clear();
        lcd.setcursor(0,0);
        lcd.print(callsign);
       
        lcd.setcursor(0,1);
        lcd.print("                    ");       
        lcd.setcursor(0,1);
        ( int i=0;i<20;i++ ) { lcd.print(data[i]); }

        // print on line 2
        lcd.setcursor(0,2);
        lcd.print("                    ");       
        lcd.setcursor(0,2);       
        if ( strlen(data) < 40 ) {
            ( int i=20;i<strlen(data);i++ ) { lcd.print(data[i]); }
        } else {
            ( int i=20;i<40;i++ ) { lcd.print(data[i]); } // truncate data till 40 bytes
        }
                 
        firstbracket, secondbracket, secondcolon, thirdcolon = 0;
       
       } // endif src check
       
        // clear buffers after saving out variables callsign, path , data
        inbuffer = "";      // clear buffers
        charbuffer[0] = 0;  // clear buffers
        bufferindex = 0;    // reset index
        callsign[0] = 0;
        path[0] = 0;
        data[0] = 0;
       
      } // end storestring
}



i not understand wrote, doubt if combining both softwareserial , altsoftserial work.
do use libraries use same timer altsoftserial ?
normally softwareserial can used few serial ports. select 1 port , sent , wait respose. after select serial port , on. think okay gps module, don't know how modem behaves.

the arduino leonardo has same size arduino uno, , leonardo might able this. when use usb connection debugging , commands (and upload sketch), , use hardware serial @ pin 0 , 1 modem, , softwareserial library gps.
the leonardo uses internal software/hardware serial port usb, , hardware serial port @ pin 0 , 1 free available own use.

the arduino mega 2560 has 4 hardware serial ports.

Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > Problem with 3 Serial Ports on UNO

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