GSM Shield V2 Audio jack pin-outs & Audio Echo cancelation.

there several issues have asked without responses;
1. in schematic "arduino gsm shield v2 schematic.pdf"; open gap in circuit labeled 'sj1'?

2. circuit shows jack 4 position plug,
what electrical pin positions compared physical positions?  pin-out.
i don't want assume anything.

i found in forum on '.org' site, couldn't find response or picture referenced.
"re: gsm shield 2 audio output , arduino sound output 1 speaker
postby fabioc » 14 jan 2016, 11:18

hi wimg83,
i looked [http://download.arduino.org/products/gsmshield/arduino-gsm-shield2-rev3.2-sch.pdf|shield schematic].
it seems 3-4 output audio signal , 2 gnd , 1 mic, following numeration of jack picture.
i attach picture shows connections advise verify them.
regards.
fc"

3. have microphone working in sketch call placed cell.  if noise cell heard mic, sent quectel m10, echoed cell.  have worked quectel on trying cancel echo using at+qecho(and channel, level...) without result.
one rep told me command has been abandonded.

i appreciate such working sketch telephone, location of 'sj1', , physical electrical layout of audio jack.

i have been successful microphone setup.  use mic listen when alarm call me.
here code works;
void connetwork()
  {       // topic=163449.0
  unsigned long mytimeout = 30000; // limit in milliseconds. 30 sec.
  boolean notconnected = true;
  unsigned long timeconnect = millis();
 
  serial.println("trying connect...");
 
//  gsmaccess.begin("",true,false); //use async mode , requires gsm debug mode
    gsmaccess.begin("",true); //use async mode , requires gsm debug mode
                                  // has been set on gsm object creation.
  while( notconnected && ( ( millis()-timeconnect ) < mytimeout) )
    {
    int result = 0;
    result = gsmaccess.ready();
    //call if debugging on. otherwise never reach gsm_ready...?!?
    //if( debugflag )
    //  {
      serial.print("return code 'gsmaccess.ready': ");
      serial.println( result ); // print result code.
    //  }
    timeloop(1000); //might not call ready often. see gsm3shieldv1accessprovider.cpp,
                // gsm3shieldv1accessprovider::begin
    result = gsmaccess.getstatus();

    if (result == gsm_ready)
      {
      serial.println( "gsm connected!");
      notconnected = false; // therefore true/connected.
      }
      else
      {
      serial.print(f("gsm status: "));
      serial.println( result );
      }     
    }
  if(notconnected)
    {
    serial.println("error in connection");
    char codemsg[]="regf";
    recordlog(codemsg);
    }
  else
    {
    serial.println("connected gsm network");
    }
  }
/////////////////////////////////////////////////////////////////////// end of connetwork

void micsetup()
  {
  // 1 information response: long result code format: <cr><lf><verbose code><cr><lf>
  serial.println(modemaccess.writemodemcommand("ate1",5));
  // 1 information response: long result code format: <cr><lf><verbose code><cr><lf>
  serial.println(modemaccess.writemodemcommand("atv1",5));
 
  // at+qaudch swap audio channels, set active channel 1(2nd ch).
  serial.println(modemaccess.writemodemcommand("at+qaudch=1",5));

  // at+qmic change microphone gain level,<channel>,<gainlevel>
  serial.println(modemaccess.writemodemcommand("at+qmic=1,4",5));
  // at&w  = store current parameter user defined profile
  serial.println(modemaccess.writemodemcommand("at&w",5));

  // at+qaps used modify echo algorithm parameters of three
  // software audio channels. value 32513 = disable.
  serial.println(modemaccess.writemodemcommand(
  "at+qaps=1,4,1,\"254.224.32513.31.57351.24607.400.132.80.4325.99.0.16392.0.0.0\"",5));
 
  // at+clvl used modify analog gain of receiver.
  // can increase or reduce loudness of downlink speech.
  serial.println(modemaccess.writemodemcommand("at+clvl=1",5)); //key 'no echo'.
  // at&w  = store current parameter user defined profile
  serial.println(modemaccess.writemodemcommand("at&w",5));
  }
in setup, call connetwork, micsetup.
in loop, every 18 minutes, check see if network registration still good.  if not, call
the subs again.
note microphone amplified unit.

hi there,

it seems having exact problems. did have luck trying solve that?
i mped you

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