TinyGPS++ Custom didn't work in Mbed OS (Maybe you can help)

[3nd0y]

Hi, i use lib which ported from yours. But unfortunately i couldn't extract some string like $SPDDT or $SPDBT.

Here simple code:

#include "mbed.h"
#include "millis.h"
#include "SDFileSystem.h"
#include "TinyGPSplus.h"
#define GPS_BAUDRATE 9600
#define DEBUG_BAUDRATE 115200

Serial sonar(PB_10,PB_11);  // tx, rx
Serial gps(PA_9,PA_10);    // tx, rx
Serial pc(PA_2,PA_3);       // tx, rx
TinyGPSPlus tgps,tsonar;
TinyGPSCustom csonar(tsonar,"SDDBT",2);
TinyGPSCustom c2sonar(tsonar,"SDDPT",1);
Ticker wrDataTick;

bool read_gps(bool debug=false) {
    char ch;
    bool stat;
    if(gps.readable()) {
        ch = gps.getc();
        if(debug)pc.putc(ch);
        stat = tgps.encode(ch);    
    }   
    return stat; 
}

bool read_sonar(bool debug=false){
    char ch;
    bool stat;
    if(sonar.readable()){ 
        ch=sonar.getc();
        stat=tsonar.encode(ch);
        if(debug)pc.putc(ch);
    }  
    return stat;
}

int main() {
   millisStart();
   gps.baud(GPS_BAUDRATE);
   pc.baud(DEBUG_BAUDRATE);

    while(1) {
        if(read_sonar()){            
            printf("\nis Sonar Updated? %d and valid? %d\n",csonar.isUpdated(), csonar.isValid());
            printf("Char Depth processed: %d, failed checksum: %d\n",tsonar.charsProcessed(), tsonar.failedChecksum());
            printf("Sonar = %s\n",csonar.value());
            printf("Sonar 1 = %s\n\n",c2sonar.value());
        }
        if(read_gps()){
            printf("is GPS updated? %d and valid? %d\n", tgps.location.isUpdated(), tgps.location.isValid());
            printf("Char GPS processed: %d, failed checksum: %d\n",tgps.charsProcessed(), tgps.failedChecksum());    
        } 
    }

return 0;
}

This is what i got: is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

is GPS updated? 0 and valid? 0 Char GPS processed: 3229, failed checksum: 18

is Sonar Updated? 0 and valid? 0 Char Depth processed: 4520, failed checksum: 109 Sonar = Sonar 1 =

So why it's never update and i can't obtain value via Tinygps custom?