Èkọ́ ESP32 5/55 - Fade LED, ṣàkóso ìmọ́lẹ̀ LED kan -ESP32 IoT Learning kit

Èkọ́ ESP32 5/55 - Fade LED, ṣàkóso ìmọ́lẹ̀ LED kan -ESP32 IoT Learning kit

Ikẹkọ yii ṣe afihan bi a ṣe le ṣakoso imọlẹ LED kan nipa lilo microcontroller ESP32, ni pataki SunFounder ESP32 IoT Learning Kit (ninu fidio ni 00:04). Iṣẹ akanṣe yii dara fun awọn olubere ti n kọ ẹkọ nipa pulse width modulation (PWM) ati awọn lilo rẹ ni ṣiṣakoso agbara awọn orisun imọlẹ. Awọn agbara PWM ti o wa ninu ESP32 ngbanilaaye iṣakoso didan, deede, ṣiṣi awọn aye pupọ fun awọn iṣẹ akanṣe ẹda.

Awọn Lilo Ilowo:

• Ṣiṣẹda awọn eto imọlẹ agbegbe pẹlu imọlẹ ti o ṣe atunṣe.
• Kọ́ imọlẹ alẹ́ ti o rọrun pẹlu didin diẹdiẹ.
• Idagbasoke imọlẹ itọkasi ti o ni agbara fun awọn ipo oriṣiriṣi (fun apẹẹrẹ, batiri kekere, asopọ nẹtiwọki).
• Iṣọpọ pẹlu awọn sensosi miiran ati awọn ẹrọ lati ṣẹda awọn fifi sori ẹrọ ibaraenisepo eka.

Ohun elo/Awọn ẹya

Iṣẹ akanṣe yii lo SunFounder ESP32 Starter Kit (ninu fidio ni 00:12), eyiti o pẹlu microcontroller ESP32, igbimọ ifaagun, awọn ẹya oriṣiriṣi, ati batiri litiumu 18650. Iwọ yoo tun nilo LED kan ati resistor 220-ohm (ninu fidio ni 04:32).

Itọsọna Asopọ

Tọka si aworan asopọ ninu fidio (ninu fidio ni 01:46 ati 04:18) ati alaye alaye ni aago 04:40. Asopọ naa pẹlu sisopọ anode LED si resistor, resistor si pin GPIO 26 ti ESP32, ati cathode LED si ilẹ.

LED ni ọna ṣiṣan pẹlu resistor 220 ohm.  Ni isalẹ ni asopọ lori breadboard. 

Alaye Koodu

Koodu Arduino lo Pulse Width Modulation (PWM) lati ṣakoso imọlẹ LED. Awọn ẹya pataki ti o ṣe atunto ni:

• ledPin: Ṣalaye pin GPIO ti o sopọ si LED (ninu fidio ni 09:41, ṣeto si 26). Yi eyi pada ti o ba lo pin ti o yatọ.
• fadeAmount: Ṣakoso iwọn ti imọlẹ LED ṣe yipada (ninu fidio ni 10:06). Iye ti o ga julọ yorisi didin yiyara. Koodu naa laifọwọyi yi itọsọna pada nigbati imọlẹ ba de iye ti o kere julọ (0) tabi ti o pọ julọ (255) (ninu fidio ni 11:44).

const int ledPin = 26;  // Pin GPIO fun LED
int brightness = 0;
int fadeAmount = 5;

void setup() {
  ledcAttachPin(ledPin, 0); // So pin si ikanni PWM
}

void loop() {
  ledcWrite(ledPin, brightness); 
  brightness = brightness + fadeAmount;
  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  delay(50); 
}

Iṣẹ akanṣe Ifiwe/Ifihan

Fidio naa ṣe afihan LED ti n didin ni iṣe (ninu fidio ni 14:51). Olukọni naa ṣe afihan bi a ṣe le ṣatunṣe oniyipada fadeAmount lati ṣakoso iyara ti didin (ninu fidio ni 15:16 ati 15:51). Ilana ti gbigbe koodu si ESP32 tun han (ninu fidio ni 14:20).

Awọn ipin

• [00:00] Ifihan ati Akopọ Iṣẹ akanṣe
• [00:12] Akopọ ESP32 Starter Kit
• [01:46] Aworan Asopọ ati Alaye
• [02:03] Awọn ifihan agbara oni-nọmba ati PWM
• [04:18] Sisopọ LED
• [06:33] Alaye Koodu: Awọn iṣẹ
• [09:11] Alaye Koodu: Didin LED
• [13:33] Gbigbe Koodu
• [14:51] Ifihan Ifiwe ati Awọn Atunṣe

Aworan

LED_fade_ESP32

LED_with_Resistor

LED_fade_ESP32

LED_with_Resistor

const int ledPin = 26;  // The GPIO pin for the LED
int brightness = 0;
int fadeAmount = 5;

void setup() {
  ledcAttach(ledPin, 5000, 8);  // Attach the LED pin
}

void loop() {
  ledcWrite(ledPin, brightness);  // Write the new brightness value to the PWM pin
  brightness = brightness + fadeAmount;
  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  delay(50);  // Wait for 50 milliseconds
}