Hi, I'm having a problem with this code. It is written to blink seven led lights randomly. But I would like it to work for a minute and than stop for minute or two, and start again in a loop. I've put a delay at the end of the code, did not work, lights were just blinking slower. Thank you for your help, I seem not to see the problem. int leds[7] = {7,8,9,10,11,12,13}; void setup(){ for (int jj; jj<sizeof(leds)/sizeof(int);jj++){ pinMode(leds[jj],OUTPUT); delay(30); } } void loop(){ digitalWrite(leds[random(0,sizeof(leds)/sizeof(int))],HIGH); delay(random(30,400)); digitalWrite(leds[random(0,sizeof(leds)/sizeof(int))],LOW); }

What does this example do ? #define ENABLED true #define DISABLED false #define LEDon HIGH //PIN---[220R]---A[LED]K---GND #define LEDoff LOW const byte leds[7] = {7, 8, 9, 10, 11, 12, 13}; const byte heartbeatLED = 2; const byte maxLEDs = sizeof(leds) / sizeof(byte); bool timingFlag = ENABLED; //timing stuff unsigned long heartbeatTime; unsigned long toggleLedTime; unsigned long disableTime; unsigned long disableInterval = 10ul * 1000; //10 seconds (change as needed) unsigned long LEDinterval; // s e t u p ( ) //********************************************^************************************************ void setup() { for (byte x = 0; x < maxLEDs; x++) { pinMode(leds[x], OUTPUT); } pinMode(heartbeatLED, OUTPUT); randomSeed(analogRead(0)); } //END of setup() // l o o p ( ) //********************************************^************************************************ void loop() { //************************************************ T I M E R heartbeatLED //is it time to toggle the heartbeat LED ? if (millis() - heartbeatTime >= 500ul) { //restart this TIMER heartbeatTime = millis(); //toggle the heartbeat LED if (digitalRead(heartbeatLED) == HIGH) digitalWrite(heartbeatLED, LOW); else digitalWrite(heartbeatLED, HIGH); } //************************************************ T I M E R toggle LED //if enabled, is it time to toggle the a LED ? if (timingFlag == ENABLED && millis() - toggleLedTime >= LEDinterval) { //restart this TIMER toggleLedTime = millis(); digitalWrite(leds[random(0, maxLEDs)], LEDon); digitalWrite(leds[random(0, maxLEDs)], LEDoff); LEDinterval = random(30, 400); } //************************************************ T I M E R disable //is it time to toggle the timingFlag ? if (millis() - disableTime >= disableInterval) { //restart this TIMER disableTime = millis(); //LEDs OFF for (byte x = 0; x < maxLEDs; x++) { digitalWrite(leds[x], LEDoff); } //toggle the timing Flag if (timingFlag == ENABLED)timingFlag = DISABLED; else timingFlag = ENABLED; } //************************************************ //other non blocking code goes here //************************************************ } //END of loop()

[image] LarryD: The offered sketch was divided into 3 different TIMERs to show some structure, however when it comes to helping a new person in the field it's hard to decide how far and to what complexity the new person is at in their understanding of things :thinking: . Adding a third timer added complexity that IMHO is not nescessary And if a person does understand a pretty much complex code this person will have a breeze with a lesser complex code. ==> make the code as easy to understand as possible ==> explain in more detail than in less

Ok, yes, I see that. What exactly do you mean with "allowed to check"? Like if it's working correctly or to check meaning it is right/enabled. Not sure if I formed that right :sweat_smile: Also, why are the brackets here empty: millis() Should they be empty or should I add milliseconds? Thanks.

Also, would you recommend some online Arduino course for a total beginner like me. To get to know Arduino coding, understand the code etc. So I can learn some basics and not only copy-paste codes and try to understand them. I've been to few workshops for e-textile and I was so intrigued. Until now I've worked with simple e-textile sewn sensors and 3V battery. But now I would like to explore LilyPad options and coding is necessary. I have found this book called Wearable Electronics; Design, prototype, and wear your own interactive garments by Kate Hartman, maybe it'll be good place to start since is covers basic coding :slight_smile:

[image] lc95: What exactly do you mean with "allowed to check"? When the timingFlag variable is equal to ENABLED you can execute the code found next. When the timingFlag variable is not equal to ENABLED you cannot execute the code found next. [image] lc95: millis() Should they be empty or should I add milliseconds? millis( ) is a function that returns the number of milliseconds since the Arduino was powered on. This function does not take any arguments, i.e. there is no need to place anything between the ( and ).

[image] lc95: Should they be empty Yes. millis is a function that takes no (arguments) so it is called like someVariable = millis(); and returns a value you can use directly, as you saw in @LarryD's code, or to assign to a variable for further use as I wrote just now. a7

[image] lc95: I would try and play with this code via Breadboard I've not heard of Breadboard, I will look to see what you talking about. If it is an Arduino simulator, Imma guess it is not as good as [image] Wokwi - Online ESP32, STM32, Arduino Simulator IoT and Embedded System Simulator: ESP32, STM32, Arduino, Raspberry Pi Pico, displays, sensors, motors and WiFi simulation. which I could be accused of relentlessly promoting. :expressionless: Check it out. Free, no need to make an account or anything. a7

Thank you, I though to, but still wanted to ask:)

[image] lc95: Also, would you recommend some online Arduino course for a total beginner like me. Suggest you look at this thread. Some of the items will not apply to what you want, others should help you a lot. [image] Share tips you have come across General Electronics Arduino links of interest. How to use this forum: Example sketches: https://docs.arduino.cc/built-in-examples/ Getting started: https://www.arduino.cc/en/Guide https://docs.arduino.cc/learn/ Basics of C++ on an Arduino Arduino Programming Course Programming course Listing of downloadable 'Arduino PDFs' : Either Google >>>- - - - > arduino filetype: pdf Or click the link immediately below: 100s of PDFs for Arduino [Arduino MASTERCLASS | What can Arduino do? PART …

This is a breadboard, I use it to check my circuits and codes before start to sew my projects [2395961-40.jpg]

How to stop the code loop and start it again?

Projects Programming

LarryD November 5, 2023, 7:14pm 65

Suggest you look at this thread.

Some of the items will not apply to what you want, others should help you a lot.

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How to stop the code loop and start it again?

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