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Power Management in Projects | NexaLearn IoT Lab | NexaLearn

Power Management25 دقيقة

Power Management in Projects

How to make your project's battery last months instead of hours.

Lesson Content

IoT projects (like an agricultural temperature sensor) should not need battery replacement weekly. Solutions: 1. Remove LEDs from the Arduino board as they draw continuous power. 2. Use Arduino without a voltage regulator (Standalone ATmega328P). 3. Enable Deep Sleep modes, so the controller sleeps for an hour, wakes for one second to send a reading via Wi-Fi, then sleeps again — reducing consumption to microamps.

Components Needed

ESP32 أو ATmega328P

Code Example

// أمر السبات لـ ESP32 لمدة 10 ثوانٍ
#define uS_TO_S_FACTOR 1000000
void setup(){
  // كود الحساسات والواي فاي هنا
  esp_sleep_enable_timer_wakeup(10 * uS_TO_S_FACTOR);
  esp_deep_sleep_start();
}
void loop(){}

Common Mistakes

Leaving a high-current sensor (like MQ smoke sensors) connected to permanent VCC. An MQ sensor will drain the battery in a day even if the processor is asleep. You must control the sensor's power via a transistor to wake it only when needed.

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