Weighbridge with loadcells, HX711, HC-SR04, 32x64 RGB led display, Arduino mega

Projects Programming
1

Hello,

I have problems running the program in the attachment.
The part of the Sonar sensors (HC-SR04) and the display are working fine.
The problem is the weighing part.
It gives random results when using the RGB LED display, but when I use the calibrating program for loadcells in combination with a HX711 board, displayed by the serial monitor, the values are correct.

The program does the following:

  1. check if there is a vehicle at the beginning (using HC-SR04)
  2. when light is green check position of the vehicle on the weighbridge and when it het reached the center display STOP (using HC_SR04)
  3. the weighing process start and will be displayed (using loadcells with HX711 board)
  4. vehicle can drive from the weighbridge
  5. check if weighbridge is empty. (using HC-SR04)
  6. start at beginning (number 1)

Can it be that the complete program is to much for a Arduino mega? memory?

Or is there a programming issue?

I hope someone can help me.

Thanks in advance.

wieghbridge V3.09.txt (12.8 KB)

2

goto beginopnieuw;Uh-oh.

3

I am Dutch so some parts are written in Dutch. "Goto beginopnieuw" is used to get the program start at the begin to check the buttonstate.

4

Goto beginopnieuw" is used to get the program start at the begin to check the buttonstate.

We know what it accomplishes. It makes a mess of your code. A while statement does the same thing for well structured goto statements, without allowing you to jump to some random location. In 30 years of writing C and C++ code, I have used ONE goto statement, since removed.

Your code should not need ANY goto statements. Draw a flowchart to show what the logic is doing. If you can't fit a rectangle around part of your code, and create a function of that part that does the looping WITHOUT using goto, then your logic is wrong.