ESP8266 Community Forum

Posted: **Sat Nov 05, 2016 5:59 pm**

So I figured out that if you do not send it 32 characters for the MD5 it will ignore it.... would be nice that it throws an error if you do not supply a valid MD5.... that said I am still debugging...

RichardS

Posted: **Sat Nov 05, 2016 6:13 pm**

Cool so I think its working now.

So let this be a learning lesson!

Creating the hash returns 16 bytes, not characters.... so use: to make it a ASCII string

Code: Select all

  for(int i=0; i<16; ++i) {
    sprintf((char*)&buf[i*2], "%02x", hash[i]);
  }  
  buf[32] = 0;

and!! make sure its lower case %02x not upper %02X, does not like that!

and.... 32 ASCII HEX characters!

RichardS

Posted: **Sun Nov 06, 2016 3:09 pm**

@ Richard S,

I was recently wondering if this could be done.

It would be a great asset to finishing off a chunk of my project.

I'd be very grateful if you could reveal how you made it work. I played around some with Updater.h but it's all above my understanding at the moment.

Many thanks

Steve.

Posted: **Mon Nov 07, 2016 12:37 pm**

Generic version (can not post client code)

Code: Select all

  
  File f;
  UpdaterClass u;
  int fileLen;
  int readLen;
  uint8_t buf[64];

  f = SPIFFS.open("/ESP.bin", "r");
  fileLen = f.size();
  u.begin(fileLen, U_FLASH);    
  while (fileLen > 0) {         
    readLen = f.read(buf, 64);
    u.write(buf, readLen);
    fileLen -= readLen;
    if (u.hasError()) {    
      return false;
    }
    yield();
  }
  f.close();
  u.end();

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