S type load Cell

Other Hardware Sensors
1

Hi everyone, I'm relatively knew to arduino and this is my first time hooking up a sensor to it.

Steps I took so far.

  1. I looked up the spec sheet to see how it had to be wired.

  2. I wired up the load cell to arduino based off of the spec sheet.

  3. I then uploaded my code to the serial monitor and added the libraries into the library folder .

  4. I then ran the code and the serial monitor displays a value but when I change the weight on the load cell the values do not change in the monitor.

I am unsure what is going wrong. I have hooked up the load cell up to a volt meter and there is a change in voltage so I know my sensor is working correctly. And my code is running so i'm assuming that means the libraries i added are correct as well.

Here is a link to the spec sheet for the load cell I'm working with and here's the code as well.

The code is not error-ring out so I am unsure how to troubleshoot this problem. Again I'm a beginner to arduino any suggestions would help greatly.

I have attached my code and libraries as well if that helps.

Thanks,

Appreciate the help

hx711.h (682 Bytes)

Hx711.cpp (1.16 KB)

HX711-1.ino (625 Bytes)

2

Your code includes this comment:

/* sample for digital weight scale of hx711
 * library design: Weihong Guan (@aguegu)
 * library host on
 *https://github.com/aguegu/ardulibs/tree/3cdb78f3727d9682f7fd22156604fc1e4edd75d1/hx711
 *https://github.com/aguegu/ardulibs/tree/master/hx711  
 *go here for directions on how to use
 */

Did you go there and follow ALL of the directions on how to use it? Judging from your code, you did not do the entire process. The weight you use for calibration should be near the full scale value (load cell capacity).

What does your voltmeter read across A+ and A- at zero load and at full load?

PS: also, you did not include the link to your load cell spec sheet. Please do. And show your wiring.