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Topic: ADS1232 data converting (Read 677 times) previous topic - next topic

baharan370

Hi
I'm ultimately trying to read the ADS1232 with the Arduino mega2560 for a voltage measurement project (0 to 3.3 volt).  The ADS1232 is a great chip to use for this application as it is basically designed for scales and other sensitive bridge applications that require a lot of increments for a good resolution in output.

this is my code:
Code: [Select]
#include <ADS1231.h>
 ADS1231 myDMS;
void setup() {
  Serial.begin(9600);
  myDMS.attach( 6 , 5 , 11 );//6_SCLK 5_DOUT 11_PDWN
   pinMode(3, OUTPUT);
}
void loop() {
      digitalWrite(3, HIGH);
  if( myDMS.check() ) {
    long sensorValue = myDMS.readData();
    delay (100);   
    Serial.println(sensorValue);
  }
}


analog input is 3.3 V and output is:

2147483520

What does this number mean and how should I convert it to voltage?

It should be noted that:
 v ref =3.3 v
gain=1

 :smiley: Thanks in advance!

baharan370

when i connect Analog Input positive to the earth, output is:

298368
302208
329344
302464
318592
302464
306816
299648
291456
307328
304512
294528
319616
313984
300160
341120
310912
354688
305536
304768
312960
307584
305024
312960
306560
291712
308608
312960
306048
307840
317824
306560
314496
324992
300160
321664
306304
291200
279936
317824
307584
297856
.
.
...
Why?!  is this noise?

Steveiboy

I've always used MCP3426 and MCP3424 (16bit) ADC and had some noise issues, it's down to PCB layout and input filtering. Have you got input filters try and avoid bread boards these induce a lot of noise, how have you got it set up and how long are the input wires and stuff like that
I have recently ordered one of these and it's sat on my workbench waiting for me to have a mess around with. Not much help though but again not knowing your setup

outsider

If your Vref is 3.3V that number represents 3.2999998033V, can you post a wiring diagram?

baharan370

my board and chip in attached file

hemanth232

hi ,
      i am using the ads1231 24 bit ic for the weight measurement   i want get the values in the gram how to get that one and   one more thing is when the  weight is present on the load cell when is power off after thant when power is ON it give wegiht not the zero how to achevie this. for are the requied like libaries ,eeprom please give the good information about this

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