Hi,
I'm trying to connect an ADS1232 (I have an CJMCU-1232 board) to an Arduino UNO, in order to get values from a load cell.
Here is what I have done so far:
- Downloaded and installed this library: GitHub - HamidSaffari/ADS123X: An Arduino library to interface with TI ADS1232 and ADS1234 MultiChannel 24-bit ADC For Bridge Sensors.
- Edited the .h-file in the library so that the ADS1232 is defined, instead of the ADS1234
- Changed to pins in the code in the example file to the following:
#define SCALE_DOUT 7
#define SCALE_SCLK 9
#define SCALE_PDWN 6
#define SCALE_GAIN0 4
#define SCALE_GAIN1 8
#define SCALE_SPEED 5
#define SCALE_A0 3
#define SCALE_A1 2
- Made the following connections between the Ardunio and the ADS1232:
| Arduino UNO | ADS1232 | |
|---|---|---|
| 3.3V | 3.3V | |
| GND | GND | |
| 2 | TEMP | |
| 3 | A0 | |
| 4 | GAIN0 | |
| 5 | SPEED | |
| 6 | PDWN | |
| 7 | DOUT | |
| 8 | GAIN1 | |
| 9 | SCLK |
- And the following connections between the load cell and the ADS1232:
| ADS1232 | Load Cell | |
|---|---|---|
| 5V | RED (EXC+) | |
| GND | BLACK (EXC-) | |
| AINP1 | GREEN (SIG+) | |
| AINN1 | WHITE (SIG-) |
The problem:
When I upload the code to the arduino, the values from the scale are displayed as "nan".
Example from the serial monitor:
Before setting up the scale:
read: 1072054111
read average: 1072054111
get value: nan
get units: nan
After setting up the scale:
read: 1072054111
read average: 1072054111
get value: nan
get units: nan
Readings:
one reading: nan | average: 0.0
one reading: nan | average: 0.0
....
Any ideas on what might be wrong or what I could try next?
PS. I just looked in the serial monitor again, and now it says:
one reading: 3679.2 | average: 0.0
But this value seems constant and nothing happens when I apply a load to the load cell.
