Blog | Mikrokontroler ESP32

Methods to Make ESP32 Blinks

May 28, 2026

Here’s a comprehensive breakdown of all practical methods to blink an LED on an ESP32, categorized by execution model, with framework context, key APIs, and use-case guidance.

Blocking Methods #

Method	Framework	Key API	Notes
Simple Delay	Arduino / ESP-IDF	delay(500) or vTaskDelay(pdMS_TO_TICKS(500))	Blocks the CPU. Fine for single-task sketches.
Deep Sleep Wake	ESP-IDF / Arduino	esp_sleep_enable_timer_wakeup(), esp_deep_sleep_start()	Not for continuous blinking. Used for ultra-low-power periodic tasks (e.g., sensor + LED indicator).

Non-Blocking / Polling Methods #

Method	Framework	Key API	Notes
millis() State Machine	Arduino	if (millis() - lastToggle >= 500) { toggle(); }	Standard non-blocking pattern. Allows concurrent loops (WiFi, sensors, etc.).
esp_timer_get_time()	ESP-IDF	uint64_t now = esp_timer_get_time();	Microsecond-precision version of millis(). Used in same state-machine pattern.

Hardware Timer & Interrupt Methods #

Method	Framework	Key API	Notes
Hardware Timer + ISR	ESP-IDF / Arduino	timer_create(), timer_arm(), attachInterrupt()	Uses ESP32’s 4 hardware timers. ISR toggles GPIO. Must be short & marked IRAM_ATTR.
LEDC Peripheral (Hardware PWM)	ESP-IDF / Arduino	ledcSetup(), ledcAttachPin(), ledcWriteTone()	Built-in PWM controller. Can generate exact square waves without CPU. Best for precise 1 Hz.
RMT Peripheral	ESP-IDF	rmt_init(), rmt_write_sample()	Remote control peripheral. Overkill for blinking but can output arbitrary pulse trains via DMA.

FreeRTOS Task & Synchronization Methods #

(ESP32 runs FreeRTOS natively in both Arduino & ESP-IDF)

ACS724 sensor arus dengan Hall Effect

March 17, 2026

ESP32, Sensor, ACS724

ACS724 sensor arus dengan Hall Effect

alt ACS724

Referensi #

Sensor tekanan WF183DE

March 17, 2026

ESP32, Pressure

WF183DE

alt WF183DE

Referensi #

Sensor Tekanan WF183DE

March 17, 2026

ESP32, Sensor, Pressure

Tipe: WF183DE

Referensi #

Sensor Thermistor NTC MF52

March 17, 2026

ESP32, Sensor, Thermistor

Tipe thermistor: MF52-103 5% 3950

Referensi #

TM7711 ADC 24 bit

March 17, 2026

ESP32, ADC

TM7711

alt TM7711

Referensi #

Interupsi Timer pada ESP32

March 14, 2026

ESP32, Timer, Interupsi

Contoh program Interupsi timer dengan frekuensi 1 kHz, output ke GPIO nomor 2 Menggunakan Arduino Core versi 3.x (bukan 2.x)

Kode #

// ESP32 - 1 kHz LED Blink via Hardware Timer Interrupt
// Compatible with ESP32 Arduino Core v3.x (new timer API)

#define LED_PIN 0  // Built-in LED on most ESP32 dev boards

volatile bool ledState = false;

hw_timer_t* timer = NULL;

// ISR - fires at 2 kHz, toggles LED → full ON/OFF cycle = 1 kHz
void IRAM_ATTR onTimer() {
  ledState = !ledState;
  digitalWrite(LED_PIN, ledState);
}

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);

  // New API (Core v3.x): timerBegin(frequency_hz)
  // 2000 Hz ISR → LED toggles 2000x/sec → blink cycle = 1 kHz
  timer = timerBegin(2000);

  // Attach ISR
  timerAttachInterrupt(timer, &onTimer);

  // Alarm every 1 tick at 2000 Hz = every 500 µs
  timerAlarm(timer, 1, true, 0);

  Serial.println("1 kHz LED blink started (Core v3.x API).");
}

void loop() {
  // Main loop is free — all work done in ISR
  delay(1000);
  Serial.println("Running... LED blinking at 1 kHz.");
}

Referensi #

https://docs.espressif.com/projects/arduino-esp32/en/latest/api/timer.html

ESP32 Dengan Antar Muka LCD GC9A01

February 1, 2026

GC9A01

Komponen #

Komponen yang dipakai adalah sebagai berikut:

ESP32 Lolin32 Lite
Modul GC9A01

Fungsi pin pada GC9A01 #

Modul GC9A01 yang dipakai memiliki pin sebagai berikut:

RST : reset
CS : chip select
DC : data/command select
SDA : data SPI MOSI. Namanya (SDA) seperti pin pada protokol I2C, namun sebenarnya display ini menggunakan protokol SPI
SCL : clock SPI
GND : ground
VCC : 3,3 volt

Dari hasil percobaan, pin RST tidak perlu dihubungkan

ESP32C6 Mini

February 1, 2026

ESP32C6

Demo lampu kedip pada ESP32C6 Mini menggunakan LED RGB onboard

Kode #

#include <Adafruit_NeoPixel.h>
constexpr uint8_t LED_PIN = 8;
constexpr uint8_t NUM_LEDS = 1;
Adafruit_NeoPixel rgbLed(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);
struct RGB {
    uint8_t r, g, b;
};

constexpr RGB COLOR_OFF   = {0, 0, 0};
// ...Feel free to add more colors here...
constexpr RGB CUSTOM_COLOR = {255, 0, 255}; 

void setColor(const RGB& color, uint8_t brightness = 100) {
    uint16_t scale = (uint16_t)brightness * 255 / 100;
    uint8_t r = (uint8_t)(((uint16_t)color.r * scale) / 255);
    uint8_t g = (uint8_t)(((uint16_t)color.g * scale) / 255);
    uint8_t b = (uint8_t)(((uint16_t)color.b * scale) / 255);
    rgbLed.setPixelColor(0, rgbLed.Color(r, g, b));
    rgbLed.show();
}

void setup() {
    rgbLed.begin(); 
    rgbLed.show(); 
}

void loop() {
    setColor(CUSTOM_COLOR, 50); // 50% brightness
    delay(1000);
    setColor(COLOR_OFF);
    delay(1000);
}