The sketch that follows does exactly the same as the for loop sketch from part 7 of this course, except that it uses the while loop so that we can see the similarities between the two loops. you really dont need to use a 'for' loop to fade the led as a. The only way to exit is to read the button inside the 'for' loops then give it a way to exit. After your desired number of dots, clear the output. You need to run your millis () timer and increment a ‘dot’ counter every (350ms) then as the timer elapses, bump the counter, and print a dot. For is also the same and delay just stops the arduino dead so it will not monitor for a button pressed. You can’t use delay (), and indeed, you shouldn’t use a for () loop in this way - they both block your code from executing anything else. After creating a setup() function, which initializes and sets the initial values, the loop() function does precisely what its name suggests, and loops consecutively, allowing your program to change and respond. a while is like a small loop once its entered it will not exit until it has finished. I try to understand this because I would like to have it broadcast the actual. When loRafunction is defined, I dont manage to understand how it gets the proper data to be sent over LoRa. Maybe the variable could hold values 1 or 2 or 3 to reflect 3 different states. You need a variable (or maybe more than 1) to keep track of the state of the system. Towards the end of the code in the loop function. I had inferred from your Original Post that you were using the word 'delay' in the sense of 'wait' for an indefinite period while other things continued. The do while loop is always run at least once before any tests are done that could break program execution out of the loop. To use the blink without delay techniques in this sketch, it would have to be totally rewritten as a state machine or the standard if logic used to check millis() to see if the time has expired would need to be written as a while loop, which puts it right back to being a more complicated way of doing the same thing as delay(). Learn loop() example code, reference, definition. My guess is a for or while loop should be the answer, I just dont manage to get an idea of how to code it. I am a third year student, the first arduino classes started this year - Im having trouble executing a for loop with delay and without stopping the program. Another loop called the do while loop is also covered.
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