Use the Arduino UART receiver to receive characters from the scale.
Use the Arduino UART transmitter to send characters to the PC.

I tried this and it gives the same results as before.

 

I don't know what is same results.

Can you post an oscilloscope screen view of the first character from the scale?

 

...and can you post your code, please?

 

The code is -

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600,SERIAL_8N2);
pinMode(0,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
while (Serial.available()) {
  Serial.println(Serial.read(),HEX);
  }
}

 

I don't know what is same results.

Can you post an oscilloscope screen view of the first character from the scale?

I currently do not have access to an oscilloscope as I am working in a Biology lab but am trying to get it soon.

 

When the input is connected to pin 0, I get the following errors while uploading the code -

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x01
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x01
Problem uploading to board.  See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

 

You have to backup. We cannot see what you are doing.
Do you have a digital camera? Show us a sharp well focused photograph of the cable from the scale to the first circuit that it is connected to.

 

The errors are no more there when pin 0 are not connected while uploading of the code.

 

You have to backup. We cannot see what you are doing.
Do you have a digital camera? Show us a sharp well focused photograph of the cable from the scale to the first circuit that it is connected to.

I am attaching 2 images (sadly taken only from my mobile phone since that is the only thing available) of the circuit - the cable, MAX232 to arduino.

 

Ok. That's good. Now send us a top view of the MAX232 circuit so that we can see all the connections to the chip.

 

I had inserted the side view for the same but if it was not clear, hope this helps.

The circuit I have used is the figure 2 in the link - http://www.google.de/imgres?imgurl=...r=1103&page=1&start=0&ndsp=11&ved=0CDYQrQMwAQ

 

There should be a capacitor +ve lead connected to pin-2. Is the -ve lead connected to GND?

You show a 5th capacitor. Where are its leads connected?

 

I am sorry, the link was a wrong one.
It is the Fig 2 from this one -
http://fos.cmb.ac.lk/esl/how-to-make-a-working-rs232-ttl-level-converter-using-max232/

 

I tried to view the data using Terminal Emulator. The results are the ones I obtained using SoftwareSerial library before I switched to AltSoftSerial.

The result screenshot is attached.

 

I can diagnose your problem in one minute if I saw an oscilloscope view of your waveform.

 

I can diagnose your problem in one minute if I saw an oscilloscope view of your waveform.

Trying to obtain that as soon as possible.