ota_backend_arduino_esp32.cpp

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#ifdef USE_ESP32_FRAMEWORK_ARDUINO
#include "esphome/core/defines.h"
#include "esphome/core/log.h"
 
#include "ota_backend.h"
#include "ota_backend_arduino_esp32.h"
 
#include <Update.h>
 
namespace esphome {
namespace ota {
 
static const char *const TAG = "ota.arduino_esp32";
 
std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::ArduinoESP32OTABackend>(); }
 
OTAResponseTypes ArduinoESP32OTABackend::begin(size_t image_size) {
  // Handle UPDATE_SIZE_UNKNOWN (0) which is used by web server OTA
  // where the exact firmware size is unknown due to multipart encoding
  if (image_size == 0) {
    image_size = UPDATE_SIZE_UNKNOWN;
  }
  bool ret = Update.begin(image_size, U_FLASH);
  if (ret) {
    return OTA_RESPONSE_OK;
  }
 
  uint8_t error = Update.getError();
  if (error == UPDATE_ERROR_SIZE)
    return OTA_RESPONSE_ERROR_ESP32_NOT_ENOUGH_SPACE;
 
  ESP_LOGE(TAG, "Begin error: %d", error);
 
  return OTA_RESPONSE_ERROR_UNKNOWN;
}
 
void ArduinoESP32OTABackend::set_update_md5(const char *md5) {
  Update.setMD5(md5);
  this->md5_set_ = true;
}
 
OTAResponseTypes ArduinoESP32OTABackend::write(uint8_t *data, size_t len) {
  size_t written = Update.write(data, len);
  if (written == len) {
    return OTA_RESPONSE_OK;
  }
 
  uint8_t error = Update.getError();
  ESP_LOGE(TAG, "Write error: %d", error);
 
  return OTA_RESPONSE_ERROR_WRITING_FLASH;
}
 
OTAResponseTypes ArduinoESP32OTABackend::end() {
  // Use strict validation (false) when MD5 is set, lenient validation (true) when no MD5
  // This matches the behavior of the old web_server OTA implementation
  if (Update.end(!this->md5_set_)) {
    return OTA_RESPONSE_OK;
  }
 
  uint8_t error = Update.getError();
  ESP_LOGE(TAG, "End error: %d", error);
 
  return OTA_RESPONSE_ERROR_UPDATE_END;
}
 
void ArduinoESP32OTABackend::abort() { Update.abort(); }
 
}  // namespace ota
}  // namespace esphome
 
#endif  // USE_ESP32_FRAMEWORK_ARDUINO