Self-updating ( from WEB server HTTP ) OTA firmware for ESP8266 AND ESP32!

mikekgr · April 19, 2019, 8:18am

Very god catch @Costas !!! By the way, how are you Sir?

Costas · April 19, 2019, 8:21am

All good here @mikekgr hope you are well.

Pgran · April 19, 2019, 8:34am

Thanks I just came to exact same conclusion

samad909 · May 25, 2019, 11:11pm

Signed up just to say thanks! This works perfectly!

I have modified it slightly,

To run the update when I write a specific value to a virtual pin,
Static URL for the update file since we only update when necessary.
Turn on a LED (on another virtual pin) that confirms that the update started, this resets itself on boot.

Requirements,

Add a button widget for virtual pin 25 and set on value to 100 - Used to initiate the update
Add a LED widget for virtual pin 30 - Used to show confirmation that the update started

This would not be possible without OP’s code so all credits go to OP.
Posting the code below for anyone who needs something similar.

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266httpUpdate.h>

char auth[] = "xxxxxxxxxxxxxxx";

char ssid[] = "xxxxxxxxxxxxxxx";
char pass[] = "xxxxxxxxxxxxxxx";

// OTA URL
const char* fwImageURL = "xxxxxxxxxxxxxxx";

// Update when virtual pin 25's value is set to 100 - just add a button widget and configure the on value of virtual pin 25 to 100.
BLYNK_WRITE(V25)
{
	int pinValue = param.asInt();

	if (pinValue == 100) {
		InstallUpdates();
	}
	
}

void InstallUpdates() {
	Serial.println( "OTA Update Request Received" );
	Serial.print( "Firmware URL: " );
	Serial.println( fwImageURL );

	HTTPClient httpClient;
	httpClient.begin( fwImageURL );
	int httpCode = httpClient.GET();
	if( httpCode == 200 ) {
		
		Serial.println( "Update file found, starting update" );
		// Set virtual pin to 1023 so the LED widget in the Blynk app lights up to show that the upgrade started
		Blynk.virtualWrite(V30, 1023);

		t_httpUpdate_return ret = ESPhttpUpdate.update( fwImageURL );

		switch(ret) {
			case HTTP_UPDATE_FAILED:
				Serial.printf("HTTP_UPDATE_FAILD Error (%d): %s", ESPhttpUpdate.getLastError(), ESPhttpUpdate.getLastErrorString().c_str());
				break;
			}
		}
	else {
		Serial.print( "Firmware check failed, got HTTP response code " );
		Serial.println( httpCode );
	}
	httpClient.end();
}

void setup()
{
	Serial.begin(9600);
	Blynk.begin(auth, ssid, pass);

	// Reset virtual pin 30 to 0 so update LED turns off on boot
	Blynk.virtualWrite(V30, 0);
}

void loop()
{
	Blynk.run();
}

langtupt · May 27, 2019, 2:32am

Hi @samad909
Can you see the picture below it’s corect? i do not update in the code.

samad909 · May 27, 2019, 7:55am

@langtupt from your screenshot I see that the OTA URL comment starts on line 3, so I can only assume that you are missing a few lines of code before it ie library includes, wifi info etc. Please copy/paste the code as is and modify the auth code, wifi info and OTA URL.

If it doesnt work please paste your full code.

langtupt · May 27, 2019, 8:12am

Dear @samad909,
The my code below, can you help me check.
Thank you very much.

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266httpUpdate.h>

char auth[] = "be03315a10f14e23a386ca85faf99c138c";

char ssid[] = "WIFI_DEM";
char pass[] = "";

// OTA URL
const char* fwImageURL = "http://xmediavn.com/update/1.bin";

// Update when virtual pin 25's value is set to 100 - just add a button widget and configure the on value of virtual pin 25 to 100.
BLYNK_WRITE(V25)
{
  int pinValue = param.asInt();

  if (pinValue == 100) {
    InstallUpdates();
  }
  
}

void InstallUpdates() {
  Serial.println( "OTA Update Request Received" );
  Serial.print( "Firmware URL: " );
  Serial.println( fwImageURL );

  HTTPClient httpClient;
  httpClient.begin( fwImageURL );
  int httpCode = httpClient.GET();
  if( httpCode == 200 ) {
    
    Serial.println( "Update file found, starting update" );
    // Set virtual pin to 1023 so the LED widget in the Blynk app lights up to show that the upgrade started
    Blynk.virtualWrite(V30, 1023);

    t_httpUpdate_return ret = ESPhttpUpdate.update( fwImageURL );

    switch(ret) {
      case HTTP_UPDATE_FAILED:
        Serial.printf("HTTP_UPDATE_FAILD Error (%d): %s", ESPhttpUpdate.getLastError(), ESPhttpUpdate.getLastErrorString().c_str());
        break;
      }
    }
  else {
    Serial.print( "Firmware check failed, got HTTP response code " );
    Serial.println( httpCode );
  }
  httpClient.end();
}

void setup()
{
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);

  // Reset virtual pin 30 to 0 so update LED turns off on boot
  Blynk.virtualWrite(V30, 0);
}

void loop()
{
  Blynk.run();
}

samad909 · May 27, 2019, 8:17am

@langtupt Please edit your post and remove the auth code. I have checked your code and it seems alright so I am not sure why it doesnt work for you. I am using a NodeMCU ESP-12 chip, what are you using?

langtupt · May 27, 2019, 9:35am

Yes, i have edit auth code, i using Wemos D1 Mini.

samad909 · May 27, 2019, 12:25pm

@langtupt I am not sure what is wrong, can you check if all your libraries are updated (inside Arduino IDE)?

A few mins back I checked your OTA URL and the web server was throwing 500 errors, can you try hosting the bin file somewhere else (maybe sign up for a free hosting to test)?

samad909 · May 27, 2019, 12:36pm

@langtupt HTTP Return Code of -1 is defined as a connection refused error in the ESP8266HTTPClient.h library - https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
#define HTTPC_ERROR_CONNECTION_REFUSED (-1)

This means that the ESP8266 is unable to reach that server from its location, try hosting the file elsewhere and make sure that you can access the URL from a PC that is on the same network as the ESP8266.

langtupt · May 28, 2019, 1:17am

Dear @samad909,
I’m try ip hosting it’s working now.
Thank you very much

Pgran · June 12, 2019, 6:57pm

Hi mikekgr

You help me last time with the OTA and it work fine at my ESP8266 and ESP32 on WiFi Thanks

I like to upgraded my ESP32 WiFi to a ESP32 WiFi + SIM800 modem at hardware port 16/17 so the unit will work when its on a WiFi, it know or use SIM800 to use the GSM net. Or just SIM800…

The routines for interfacing the SIM800 is easy and run perfect but make the combination with your routine make my hear gray I fight with WiFiClient client; right now off and on, but that’s maybe not the only conflicts, can you please again help me out here ? Thanks in advance…

Pgran · June 12, 2019, 9:04pm

This is the working code fon SIM800 …

[Unformatted code removed by moderator]

Blynk_Coeur · June 12, 2019, 9:15pm

use backticks else your sketch will be deleted ```

Pgran · June 12, 2019, 10:06pm

And backticks is ?

PeteKnight · June 12, 2019, 10:09pm

Pete.

Pgran · June 12, 2019, 10:09pm

Sorry, Preben

Blynk_Coeur · June 13, 2019, 6:57am

you replied, but didn’t add backticks !!

mikekgr · June 13, 2019, 8:11am

Dear friend,
I have zero experiences in SIM800 so I can’t help you I am afraid…
Best Regards,
Mike Kranidis