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Structuring Large Projects (Architecture) | NexaLearn IoT Lab | NexaLearn

Advanced Skills25 دقيقة

Structuring Large Projects (Architecture)

How to build code with hundreds of lines without everything becoming chaos.

Lesson Content

When combining Wi-Fi, a distance sensor, an OLED display, and a relay in the same code, putting everything inside loop() will make the code slow and complex. You must split the code into independent 'Functions': readSensors(), updateDisplay(), sendToCloud(). Also use the millis() technique instead of delay() to ensure the processor never stops working.

Code Example

unsigned long lastTime = 0;
void setup() { }
void loop() {
  if(millis() - lastTime > 1000) {
    lastTime = millis();
    readSensors();
  }
  checkButtons(); // يعمل باستمرار بدون بلوك
}
void readSensors() { /* كود الحساسات */ }
void checkButtons() { /* كود الأزرار */ }

Common Mistakes

Using delay(5000) to read a sensor every 5 seconds — this means the board won't respond to any button press or Wi-Fi message for those 5 seconds.

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Debugging Techniques