ESP32 - OTA - RTOS

// Include required libraries
#include <WiFi.h>
#include <ESPmDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>

#if CONFIG_FREERTOS_UNICORE
#define ARDUINO_RUNNING_CORE 0
#else
#define ARDUINO_RUNNING_CORE 1
#endif


#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


int BUZZER_PIN = 13;
int BUZZER_CHANNEL = 0;

int Button1Pin = 14;
int Button1Status = 0;
int Button2Pin = 15;
int Button2Status = 0;
int Button3Pin = 18;
int Button3Status = 0;




void TaskButton( void *pvParameters );
void TaskOLED( void *pvParameters );
void TaskBuzzer( void *pvParameters );

const char* ssid = "WE_87B9D0";
const char* password = "jae05161";

void setup() {

  // Now set up three tasks to run independently.
  xTaskCreatePinnedToCore(
    TaskButton
    ,  "TaskButton"   // A name just for humans
    ,  1024  // This stack size can be checked & adjusted by reading the Stack Highwater
    ,  NULL
    ,  2  // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
    ,  NULL 
    ,  ARDUINO_RUNNING_CORE);

    xTaskCreatePinnedToCore(
    TaskOLED
    ,  "TaskOLED"   // A name just for humans
    ,  5000  // This stack size can be checked & adjusted by reading the Stack Highwater
    ,  NULL
    ,  2  // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
    ,  NULL 
    ,  ARDUINO_RUNNING_CORE);

    xTaskCreatePinnedToCore(
    TaskBuzzer
    ,  "TaskBuzzer"   // A name just for humans
    ,  1024  // This stack size can be checked & adjusted by reading the Stack Highwater
    ,  NULL
    ,  2  // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
    ,  NULL 
    ,  ARDUINO_RUNNING_CORE);
    
  
  Serial.begin(115200);
  Serial.println("Booting");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("Connection Failed! Rebooting...");
    delay(5000);
    ESP.restart();
  }
  //Hostname defaults to esp3232-[MAC]
  ArduinoOTA.setHostname("myesp32");

  ArduinoOTA
    .onStart([]() {
      String type;
      if (ArduinoOTA.getCommand() == U_FLASH)
        type = "sketch";
      else // U_SPIFFS
        type = "filesystem";

      // NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
      Serial.println("Start updating " + type);
    })
    .onEnd([]() {
      Serial.println("\nEnd");
    })
    .onProgress([](unsigned int progress, unsigned int total) {
      Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
    })
    .onError([](ota_error_t error) {
      Serial.printf("Error[%u]: ", error);
      if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
      else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
      else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
      else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
      else if (error == OTA_END_ERROR) Serial.println("End Failed");
    });

  ArduinoOTA.begin();

  Serial.println("Ready");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  ArduinoOTA.handle();
}

void TaskOLED(void *pvParameters)  // This is a task.
{
  (void) pvParameters;

/*
  OLED
  Show status of all elements on the projects
*/

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display.display();
  vTaskDelay(2000); // Pause for 2 seconds

  display.clearDisplay();                 // clear display
  display.setTextSize(1);                 // set text size
  display.setTextColor(WHITE, BLACK);     // set text color

  for (;;) // A Task shall never return or exit.
  {
    if(Button1Status==1)
    {
      display.setCursor(5, 5);                   // set position to display
      display.println("button1 status : ON ");    // set text
      display.display();                         // display on OLED
    }
    else
    {
      display.setCursor(5, 5);                   // set position to display
      display.println("button1 status : OFF");    // set text
      display.display();                         // display on OLED
    }

    if(Button2Status==1)
    {
      display.setCursor(5, 20);                     // set position to display
      display.println("button2 status : ON ");    // set text
      display.display();                         // display on OLED
    }
    else
    {
      display.setCursor(5, 20);                     // set position to display
      display.println("Button2 status : OFF");    // set text
      display.display();                         // display on OLED
    }

    if(Button3Status==1)
    {
      display.setCursor(5, 35);                     // set position to display
      display.println("button3 status : ON ");    // set text
      display.display();                         // display on OLED
    }
    else
    {
      display.setCursor(5, 35);                     // set position to display
      display.println("Button3 status : OFF");    // set text
      display.display();                         // display on OLED
    }
    
  }
}


void TaskBuzzer(void *pvParameters)  // This is a task.
{
  (void) pvParameters;

/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
*/

  ledcAttachPin(BUZZER_PIN, BUZZER_CHANNEL);

  for (;;) // A Task shall never return or exit.
  {
    ledcSetup(BUZZER_CHANNEL, 635, 8);
    ledcWrite(BUZZER_CHANNEL, 50);
    vTaskDelay(700);
    ledcSetup(BUZZER_CHANNEL, 911, 8);
    ledcWrite(BUZZER_CHANNEL, 50);
    vTaskDelay(700);
  }
}


void TaskButton(void *pvParameters)  // This is a task.
{
  (void) pvParameters;

/*
  Button
  read the state of the button
*/

  // initialize Button pin as an INPUT.
  pinMode(Button1Pin,INPUT_PULLUP);
  pinMode(Button2Pin,INPUT_PULLUP);
  pinMode(Button3Pin,INPUT_PULLUP);


  for (;;) // A Task shall never return or exit.
  {
    if (digitalRead(Button1Pin)== LOW)
    {
        Button1Status = 1;
        vTaskDelay(10);
    }
    else
    {
      Button1Status = 0;
      vTaskDelay(10);
    }

    if (digitalRead(Button2Pin)== LOW)
    {
        Button2Status = 1;
        vTaskDelay(10);
    }
    else
    {
      Button2Status = 0;
      vTaskDelay(10);
    }

    if (digitalRead(Button3Pin)== LOW)
    {
        Button3Status = 1;
        vTaskDelay(10);
    }
    else
    {
      Button3Status = 0;
      vTaskDelay(10);
    }
  }
}           

Quick Steps

• power up your board
• Open Arduino IDE
• Select the right board
• Select the right port
• Copy the above code and open with Arduino IDE
• Click Upload button on Arduino IDE to upload code to ESP32

• See the changes you made