Collecting data, pausing, saving as variable, and resuming collection

Using Arduino Programming Questions
1

Hi!

I am using an I2C pressure sensor (connected to a rubber bulb) with an Arduino Uno. I need to accomplish the following in my software:

  • Press a button to start collecting data
  • Temporarily stop collecting data after 5 seconds
  • Save the pressure value obtained in the 3rd second of collection as a variable to be used later
  • Resume taking data once the pressure read by the sensor equals that of the "3rd second variable"
  • Stop taking data after 30 seconds

I am struggling with this and would greatly appreciate any help! Thanks in advance!

2

What have you tried ?

Take a look at Using millis() for timing. A beginners guide, Several things at the same time and the BlinkWithoutDelay example in the IDE

3

Thank you so much for your reply!

Right now I have the following in my loop:

void loop()

{
time = millis();
if (digitalRead(7) == 1) { //Pin 7 is my start (green) button
greenbutton = true;
while (greenbutton = true) {
if(time<=5000){ // This is to hopefully collect data for the first 5sec after button is pressed
ssc.update(); //this collects data from the sensor
Serial.println(ssc.pressure());
}

Unfortunately, right now the serial monitor does not stop showing data after 5 seconds. I don't want to exit my entire loop because I need to collect more data after 5 seconds, I just need to pause and analyze data in between. Thanks again!

4

Please post your complete program or a small but complete example of it

5

UKHeliBob:
Please post your complete program or a small but complete example of it

And please post using code blocks

Read this before posting a programming question ...

6

This is an issue for sure:

while (greenbutton = true) {

should be:

while (greenbutton == true) {

But we still need to see a complete sketch.