Load cell - Led blinking problem

Projects Programming
10

For what you call your 2nd and 3rd step in your project there is only one step to learn

learning how state-machines work

all in all you have more than two conditions. Whenever you have more than two conditions that make up sequences

a good way to write code for such sequences is to use a state-machine

Your process is

set reference weight

  1. if any weight is on the scale
    check if a button is pressed for 5 seconds which means take a snapshot of time and

  2. measure how much time goes by while the button is pressed down

  3. when button is pressed down for more than 5 seconds use this weight as reference weight
    and show message on display

operation after defining reference-weight

  1. check if reference-weight is on the scale
    if a different weight is measured make a snapshot of time

  2. and measure how much time goes by while weight is different
    if more than one minute has passed by

  3. switch on LED
    if more than two minutes have passed by make snapshot of time and

  4. turn on buzzer
    check if more than 1 minute has passed by since buzzer was switched on
    if more than 1 minute have passed by switch buzzer of

all in all 7 different things. You could say 7 different states.
You can code this by using many many if-elseif-elseifelseifelseif-elses
creating a big mess where to set which flag-variable true or false

Or you learn how state-machines work and once you have learned it
you never will go back to if-elseif-elseif-elseif-

The state-machine will be very easy to modify and very easy to maintain
once you have understood the basic principle.

You have avoided to already use a state-machine.
I really recommend that you are learning it

best regards Stefan