Replace 0xE9 by ESP_IMAGE_HEADER_MAGIC.
if (it->handle == handle) {
// must erase the partition before writing to it
assert(it->erased_size > 0 && "must erase the partition before writing to it");
- if(it->wrote_size == 0 && it->partial_bytes == 0 && size > 0 && data_bytes[0] != 0xE9) {
+ if (it->wrote_size == 0 && it->partial_bytes == 0 && size > 0 && data_bytes[0] != ESP_IMAGE_HEADER_MAGIC) {
ESP_LOGE(TAG, "OTA image has invalid magic byte (expected 0xE9, saw 0x%02x", data_bytes[0]);
return ESP_ERR_OTA_VALIDATE_FAILED;
}