arduino Time Management More than 1 task without delay()
Example
If you have more than 1 task to execute repeatedly in different intervals, use this example as a starting point:
unsigned long intervals[] = {250,2000}; //this defines the interval for each task in milliseconds
unsigned long last[] = {0,0}; //this records the last executed time for each task
void setup() {
pinMode(LED_BUILTIN, OUTPUT); //set the built-it led pin as output
Serial.begin(115200); //initialize serial
}
void loop() {
unsigned long now = millis();
if(now-last[0]>=intervals[0]){ last[0]=now; firstTask(); }
if(now-last[1]>=intervals[1]){ last[1]=now; secondTask(); }
//do other things here
}
void firstTask(){
//let's toggle the built-in led
digitalWrite(LED_BUILTIN, digitalRead(LED_BUILTIN)?0:1);
}
void secondTask(){
//say hello
Serial.println("hello from secondTask()");
}
To add another task to execute every 15 seconds, extend the variables intervals and last:
unsigned long intervals[] = {250,2000,15000};
unsigned long last[] = {0,0,0};
Then add an if statement to execute the new task.
In this example, I named it thirdTask.
if(now-last[2]>=intervals[2]){ last[2]=now; thirdTask(); }
Finally declare the function:
void thirdTask(){
//your code here
}
