Arduino / ESP32 / 程式語言分類 / 開發板分類

醬是創客的ESP32教學主題第八篇，以Ai-Thinker安信可NodeMCU-32S(使用Arduino語言)來實作教學，本篇教學將著重Arduino偵測GPIO按鈕壓下時間並控制Reset Default或重新機，如同網路路由器的reset功能，長按會清除所有設定資料，短按會重開機，本篇以簡單硬體和程式碼來實作

以下是我們今天的目標

  • 使用GPIO 15搭配pinMode為INPUT來偵測高低電位
  • 高電位不觸發。當按鈕壓下時導通變為低電位，此時觸發。
  • 按下時間 <5秒，重開機，並印出less 5s time
  • 按下時間 >5秒，重開機，並印出more 5s time

設備:
安信可NodeMCU-32S #露天拍賣 #蝦皮購物

NodeMCU-32S電路接線圖如下

  • 3.3V–電阻(12K歐姆)–GPIO15–電阻(470歐姆)–按紐(Botton)–GND
  • 按紐(Botton)為按下導通，沒有按下不導通

Arduino 範例程式碼如下

//醬是創客 開發實作的好夥伴
#include "WiFi.h"

//task
unsigned long currentMillis = 0;
unsigned long previousMillisReset_1 = 0;
unsigned long previousMillisReset_2 = 0;
int intervalReset = 5000;

//button
int inPin = 15;
bool button_15_status;
bool previous_button_15_status = HIGH;//HIGH
byte button_press_counter = 0;
 
void setup() {
  Serial.begin(115200);
  //Button
  pinMode(inPin, INPUT);
}
 
void loop() {
   currentMillis = millis();
   reset_default_button();
}

void reset_default_button() {
  button_15_status = digitalRead(inPin);  
  if (button_15_status == HIGH) {         
    if (button_15_status != previous_button_15_status){
      //按下超過5秒
      if ((unsigned long)(previousMillisReset_2 - previousMillisReset_1) >= intervalReset) {
      Serial.println("more 5s time: ");
      Serial.println(previousMillisReset_2 - previousMillisReset_1);
      previous_button_15_status = button_15_status;
      //重開機
      ESP.restart();
       }
      //按下小於5秒
      else {
      Serial.println("less 5s time: ");
      Serial.println(previousMillisReset_2 - previousMillisReset_1);
      previous_button_15_status = button_15_status;
      //重開機
      ESP.restart();
      }
      
    }
    previous_button_15_status = HIGH;
   
  }
  else {
      if(button_press_counter == 0){
          previousMillisReset_1 = currentMillis;
          previousMillisReset_2 = currentMillis;
          button_press_counter = 1;      
         }
      else{
          previousMillisReset_2 = currentMillis;
         }
      previous_button_15_status = LOW;
   
  } 
}

當按鈕按下小於5秒

less 5s time: 
1786
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1044
load:0x40078000,len:8896
load:0x40080400,len:5816
entry 0x400806ac

當按鈕按下大於5秒

more 5s time: 
6924
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1044
load:0x40078000,len:8896
load:0x40080400,len:5816
entry 0x400806ac