No Data from my ddwrt router

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C++

Linux

I have cisco e900 router, with dd-wrt firmware, i connect it to arduino uno-r3 + LCD 16*2 to show-up the status and some data from that router, anyway i am using TX-RX port in both sides my problem is: there is no data!! arduino LCD just showing that > "dd-wrt - powerd cisco e900"

is there any mistake i make in my code !! this is my code on my arduino

// include the library code:
#include <Wire.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
int led1 = 8;
float raw;
byte bl[8] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
};
void setup(){
   pinMode(led1, OUTPUT);
   lcd.begin(16, 2);
  Serial.begin(9600);
  lcd.createChar(1, bl);
  lcd.createChar(2, bl);
  lcd.createChar(3, bl);
  lcd.createChar(4, bl);
  lcd.setCursor(0,0);
  lcd.print("dd-wrt - powered");
  lcd.setCursor(0,1);
  lcd.print("cisco e900");
}
void loop()
{
  int charcount;
  boolean secondline;
  if (Serial.available()) {
    delay(200);
    lcd.clear();
    charcount = 0;
    secondline = false;
    while (Serial.available() > 0) {
      if (charcount > 15 && secondline == false ) {
        lcd.setCursor(0,1);
        secondline = true;
      }
      char inChar = (char)Serial.read();
      if (inChar != '\0') {
      lcd.write(inChar);
    }
       if (inChar == '\3') {
      digitalWrite(led1, HIGH);
      }
       if (inChar == '\4'){
      digitalWrite(led1, LOW);
     }
      charcount++;
    }
  }
 }

and this command on my router cisco e900
<pre lang="Python">#!/bin/sh
I=`nvram get wl0_ifname`
SR="/dev/tts/0"
vr=`nvram get DD_BOARD`
stty -F /dev/tts/0 9600

while sleep 1; do

WIP=`nvram get wan_ipaddr`
NC=`grep 0x /proc/net/arp | grep br0 | wc -l`
DU=`uptime  | cut -c2-9`
UP=`awk '{print int($1/3600)":"int(($1%3600)/60)":"int($1%60)}' /proc/uptime`
LD=`uptime  | sed -n -e 's/^.*average: //p' |  sed s/[,]//g`
D1=`date +"%F"`
D2=`date +"%r"`
Rxw=`grep vlan1 /proc/net/dev | awk '{print ($2-l1)/1024"kB/s"}'`
Txw=`grep vlan1 /proc/net/dev | awk '{print ($10-l2)/1024"kB/s"}'`
Rxv=`grep eth1 /proc/net/dev | awk '{print ($2-l1)/1024"kB/s"}'`
Txv=`grep eth1 /proc/net/dev | awk '{print ($10-l2)/1024"kB/s"}'`
NET=`wget -qO- http://ipecho.net/plain`
ISP=`nslookup $NET | tr ' ' '\n' | tail -1 | cut -d. -f3`
IS="your_isp_home_page"
SP=`ping -c2 -W2 $IS | tail -1`
PM=$(echo $SP | awk '{print $4}' | cut -d '/' -f 1);
PA=$(echo $SP | awk '{print $4}' | cut -d '/' -f 2);
PI=$(echo $SP | awk '{print $4}' | cut -d '/' -f 3);

  if [ -z `wl -i $I assoclist` ]; then
     echo -ne "\4" > $SR
    else
     echo -ne "\3" > $SR
  fi
  echo -n "$vr" > $SR
sleep 8

  echo -ne "$D1      $D2" > $SR
  sleep 3
    echo -ne "WAN IP:         $WIP" > $SR
  sleep 3
 if ! ping -c2 -W2 $IS > /dev/null; then
   echo -ne "$NC client        Internet DOWN" > $SR
   echo -ne "\2" > $SR
   nt=0;
 else
   nt=1;
   echo -ne "$NC client        Internet UP" > $SR
   echo -ne "\1" > $SR
   sleep 3
   echo -ne "Net IP:         $NET" > $SR
   sleep 3
   echo -ne "ISP:            $ISP" > $SR
 fi
  sleep 3
 if [ "$nt" -eq 1 ]; then
    echo -ne "Ping avg: $PA$PM/$PI" > $SR
  sleep 4
 fi
    echo -ne  "WAN RX:         $Rxw" > $SR
  sleep 3
    echo -ne  "WAN TX:         $Txw" > $SR
  sleep 3
    echo -ne "WLan RX:        $Rxv" > $SR
  sleep 3
    echo -ne "WLan TX:        $Txv" > $SR
  sleep 3
    echo -ne "Time $DU   UP $UP " > $SR
  sleep 3
    echo -ne "Load            $LD" > $SR
  sleep 3
done