testOTA.ino

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266httpUpdate.h>
#include <WiFiClientSecure.h>
#include <CertStoreBearSSL.h>
BearSSL::CertStore certStore;
#include <time.h>
 
const String FirmwareVer={"1"}; 
#define URL_fw_Version "/tuantran1305/OTA/version.txt"
#define URL_fw_Bin "https://raw.githubusercontent.com//tuantran1305/OTA/example.bin"
const char* host = "raw.githubusercontent.com";
const int httpsPort = 443;

// DigiCert High Assurance EV Root CA
const char trustRoot[] PROGMEM = R"EOF(
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
)EOF";
X509List cert(trustRoot);


extern const unsigned char caCert[] PROGMEM;
extern const unsigned int caCertLen;

const char* ssid = "TIC2";
const char* password = "Agiftfromtheheart";

void setClock() {
   // Set time via NTP, as required for x.509 validation
  configTime(3 * 3600, 0, "pool.ntp.org", "time.nist.gov");
  Serial.print("Waiting for NTP time sync: ");
  time_t now = time(nullptr);
  while (now < 8 * 3600 * 2) {
    delay(500);
    Serial.print(".");
    now = time(nullptr);
  }
  /*
  Serial.println("");
  struct tm timeinfo;
  gmtime_r(&now, &timeinfo);
  Serial.print("Current time: ");
  Serial.print(asctime(&timeinfo));
  */
}
  
void FirmwareUpdate()
{  
  WiFiClientSecure client;
  client.setTrustAnchors(&cert);
  if (!client.connect(host, httpsPort)) {
    Serial.println("Connection failed");
    return;
  }
  client.print(String("GET ") + URL_fw_Version + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" +
               "User-Agent: BuildFailureDetectorESP8266\r\n" +
               "Connection: close\r\n\r\n");
  while (client.connected()) {
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      //Serial.println("Headers received");
      break;
    }
  }
  String payload = client.readStringUntil('\n');

  payload.trim();
  if(payload.equals(FirmwareVer) )
  {   
     Serial.println("Device already on latest firmware version"); 
  }
  else
  {
    Serial.println("New firmware detected");
    ESPhttpUpdate.setLedPin(LED_BUILTIN, LOW); 
    t_httpUpdate_return ret = ESPhttpUpdate.update(client, URL_fw_Bin);
        
    switch (ret) {
      case HTTP_UPDATE_FAILED:
        Serial.printf("HTTP_UPDATE_FAILD Error (%d): %s\n", ESPhttpUpdate.getLastError(), ESPhttpUpdate.getLastErrorString().c_str());
        break;

      case HTTP_UPDATE_NO_UPDATES:
        Serial.println("HTTP_UPDATE_NO_UPDATES");
        break;

      case HTTP_UPDATE_OK:
        Serial.println("HTTP_UPDATE_OK");
        break;
    } 
  }
 }  
void connect_wifi();
unsigned long previousMillis_2 = 0;
unsigned long previousMillis = 0;        // will store last time LED was updated
const long interval = 60000;
const long mini_interval = 1000;
 void repeatedCall(){
    unsigned long currentMillis = millis();
    if ((currentMillis - previousMillis) >= interval) 
    {
      // save the last time you blinked the LED
      previousMillis = currentMillis;
      setClock();
      FirmwareUpdate();
    }

    if ((currentMillis - previousMillis_2) >= mini_interval) {
      static int idle_counter=0;
      previousMillis_2 = currentMillis;    
      Serial.print(" Active fw version:");
      Serial.println(FirmwareVer);
      Serial.print("Idle Loop....");
      Serial.println(idle_counter++);
     if(idle_counter%2==0)
      digitalWrite(LED_BUILTIN, HIGH);
     else 
      digitalWrite(LED_BUILTIN, LOW);
     if(WiFi.status() == !WL_CONNECTED) 
          connect_wifi();
   }
 }

  
void setup()
{
  Serial.begin(115200);
  Serial.println("");
  Serial.println("Start");
  WiFi.mode(WIFI_STA);
  connect_wifi();  
  setClock();
  pinMode(LED_BUILTIN, OUTPUT);
  
}
void loop()
{
  repeatedCall();    
}

void connect_wifi()
{
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print("O");
  }                                   
  Serial.println("Connected to WiFi");
}