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Debugging Techniques | NexaLearn IoT Lab | NexaLearn

Advanced Skills20 دقيقة

Debugging Techniques

What to do when your project doesn't work and there are no compilation errors.

Lesson Content

The hardest type of errors are Logic Errors. Step 1: Simplify the circuit. Disconnect all components and test the suspected component with standalone code. Step 2: Print Debugging. Place Serial.println("I am here 1"); at different places in the code to find where the program hangs.

Wiring Notes

Always use a multimeter to verify that voltage (5V and GND) is actually reaching the sensor's legs before assuming the sensor is faulty.

Code Example

// استخدام الماكرو لتسهيل التتبع
#define DEBUG 1
#if DEBUG
  #define debugPrint(x) Serial.println(x)
#else
  #define debugPrint(x)
#endif

void loop() {
  debugPrint("Reading sensor...");
  // ... كود الحساس ...
}

Common Mistakes

Guessing where the fault is and randomly changing lines of code. Follow a scientific approach by eliminating causes one by one.