ESP32 Forum

HI Guys.

I am getting below error while executing simple OTA. Please help.

I (5772) simple_ota_example: Starting OTA example
I (7482) esp_https_ota: Starting OTA...
I (7482) esp_https_ota: Writing to partition subtype 16 at offset 0x110000
E (10062) esp_ota_ops: OTA image has invalid magic byte (expected 0xE9, saw 0x45)
E (10062) esp_https_ota: Error: esp_ota_write failed! err=0x5379
E (10072) simple_ota_example: Firmware upgrade failed

I am using IDF V4. on ESP32 WROOM 32 .

Regards,
Sreedhar

0x45 is an ascii character ('E'). Are you sure that whatever you set as the firmware update endpoint actually serves a valid OTA image?

Hi ESP_Sprite,

I copied over the bin file from build folder to endpoint folder. I am using the same example file as new firmware with just an additional printf statement.

Regards,
Sreedhar

The point its it can be redirecting link with http code 30x, it can be any text returned etc.
Usually issue was when downloaded content was some html with "<" (0x3C). In your case its very unusual, because its "E" (0x45).

Hi,
Could anyone guide me how to implement " simple_ota_example" properly.

Regards,
Sreedhar