OTA update issue with magic byte

[adamoos]

Hi all,

While updating my firmware on ESP8266 with OTA I'm getting magic byte error I checked my bin file and 0xE9 is first byte. My code snippet:

Code: [Select all] [Expand/Collapse]

1.     std::unique_ptr<BearSSL::WiFiClientSecure> client(new BearSSL::WiFiClientSecure);
2.     client->setInsecure();
3.  
4.     HTTPClient http;
5.  
6.     http.begin(*client, "https://example.com/firmware.bin");
7.     int httpCode = http.GET();
8.  
9.   if (httpCode <= 0) {
10.     Serial.printf("HTTP failed, error: %s\n",
11.        http.errorToString(httpCode).c_str());
12.     return;
13.   }
14.  
15.     // Check that we have enough space for the new binary.
16.     int contentLen = http.getSize();
17.     Serial.printf("Content-Length: %d\n", contentLen);
18.     bool canBegin = Update.begin(contentLen);
19.     if (!canBegin)
20.     {
21.         Serial.println("Not enough space to begin OTA");
22.         return;
23.     }
24.     // Write the HTTP stream to the Update library.
25.     WiFiClient *client2 = http.getStreamPtr();
26.     size_t written = Update.writeStream(*client2);
27.     Serial.printf("OTA: %d/%d bytes written.\n", written, contentLen);

GeSHi © Codebox Plus Extension

With method call: Update.writeStream(*client2) - I'm getting magic byte error.

If I comment out code in Updater.cpp method _verifyHeader that checks the byte - OTA process works as expected.

Commented code:

Code: [Select all] [Expand/Collapse]

1. bool UpdaterClass::_verifyHeader(uint8_t data) {
2.     if(_command == U_FLASH) {
3.         // check for valid first magic byte (is always 0xE9)
4.         // if(data != 0xE9) {
5.         //     _currentAddress = (_startAddress + _size);
6.         //     _setError(UPDATE_ERROR_MAGIC_BYTE);
7.         //     return false;
8.         // }
9.         return true;
10.     } else if(_command == U_SPIFFS) {
11.         // no check of SPIFFS possible with first byte.
12.         return true;
13.     }
14.     return false;
15. }

GeSHi © Codebox Plus Extension

Any help will be much appreciated.
Kind regards,

[ESP_Alvin]

Hi adamoos,

Is your issue on ESP8266? If yes, would you please post your topic on the https://bbs.espressif.com? Thanks.

Alvin