AT module and RN2483: not working with my Linux box

FYI, I worked on the RN2483 this week-end, and I finally was able to send some datas on the server. here is the debug script I used, in case you need it:

var rxbuf=[];
var initState=0;
var devAddr="YOUR_DEV_ADDR";
var nwkSKey="YOUR_NETWORK_SESSION_KEY";
var appSKey="YOUR_APPLICATION_SESSION_KEY";
Serial1.setup(57600, { tx:B6, rx:B7 });
Serial1.on('data', function (data){
  if(data.indexOf('\n')>-1)
  {
    console.log(rxbuf);
    if(rxbuf.indexOf("mac_tx_ok")>-1)
      digitalWrite(LED2,1);
    else
      digitalWrite(LED2,0);
    rxbuf=[];
  }
  else
    rxbuf+=data;
});

function loraReset(){Serial1.print("sys reset\r\n");}
function loraGetVer(){Serial1.print("sys get ver\r\n");}
function loraGetVcc(){Serial1.print("sys get vdd\r\n");}
function loraGetHWEUI(){Serial1.print("sys get hweui\r\n");}
function loraSetDevAddr(addr){Serial1.print("mac set devaddr "+addr+"\r\n");}
function loraSetNwkSKey(key){Serial1.print("mac set nwkskey "+key+"\r\n");}
function loraSetAppSKey(key){Serial1.print("mac set appskey "+key+"\r\n");}
function loraSetADR(state){
  var OnOff=( (state=="ON") || (state=="on") || (state=="On") )?"on":"off"; 
  Serial1.print("mac set adr "+OnOff+"\r\n");}
function loraGetDR(){Serial1.print("mac get dr\r\n");}
function loraGetChannel(){Serial1.print("mac get ch\r\n");}
function loraGetBand(){Serial1.print("mac get band\r\n");}
function loraGetRxDelay2(){Serial1.print("mac get rxdelay2\r\n");}
function loraGetpwridx(){Serial1.print("mac get pwridx\r\n");}
function loraJoinABP(){Serial1.print("mac join ABP\r\n");}
function loraGetStatus(){Serial1.print("mac get status\r\n");}
function convertToHex(str) {
    var hex = '';
    for(var i=0;i<str.length;i++) {
        hex += ''+str.charCodeAt(i).toString(16);
    }
    return hex;
}

function loraTRX(data){
  digitalWrite(LED2,0);
  console.log("Sending: "+data);
  Serial1.print("mac tx uncnf 1 "+convertToHex(data)+"\r\n");
  //setTimeout(loraGetStatus,150);
}

function init()
{
  switch(initState)
  {
    case 0:
      console.log("LoRa init begin...");
      console.log("resetting...");
      loraReset();
      initState++;
      break;
    case 1:
      //console.log("\nVersion:");
      //loraGetVer();
      initState++;
      break;
    case 2:
      //console.log("\nVCC:");
      //loraGetVcc();
      initState++;
      break;
    case 3:
      console.log("\nHW EUI:");
      loraGetHWEUI();
      initState++;
      break;
    case 4:
      console.log("\nSetting devAddr");
      loraSetDevAddr(devAddr);
      initState++;
      break;
    case 5:
      console.log("\nSetting nwkSKey");
      loraSetNwkSKey(nwkSKey);
      initState++;
      break;
    case 6:
      console.log("\nSetting appSKey");
      loraSetAppSKey(appSKey);
      initState++;
      break;
    case 7:
      console.log("\nDisabling Adaptative Data Rate");
      loraSetADR("off");
      initState++;
      break;
    case 8:
      //console.log("\nRetrieving data rate...");
      //loraGetDR();
      initState++;
      break;
    case 9:
      //console.log("\nRetrieving channel...");
      //loraGetChannel();
      initState++;
      break;
    case 10:
      //console.log("\nRetrieving band...");
      //loraGetBand();
      initState++;
      break;
    case 11:
      //console.log("\nRetrieving rxDelay2...");
      //loraGetRxDelay2();
      initState++;
      break;
    case 12:
      //console.log("\nRetrieving power output index value...");
      //loraGetpwridx();
      initState++;
      break;
    case 13:
      console.log("\nJoining ABP...");
      loraJoinABP();
      initState++;
      break;
    case 13:
      console.log("\nStatus: ");
      loraGetStatus();
      initState++;
      break;
    case 14: 
      initState=-1;
      break;
    default:break;
  }
  if(initState!=-1)
    setTimeout(init,50);
}

function BTNHandle()
{
 var a=getTime().toString().slice(7,9); 
  loraTRX(a);
}

setTimeout(init,1000);
setWatch(BTNHandle,BTN,{repeat:true,edge­:'falling',debounce:50});
save();