Powering down SD-Card Reader prior to httpupdate

Projects General Guidance
1

Continuing the discussion from Reading SD Card with ESP32 Troubles:

Hi,

with my ESP32, I noticed that SD cards were often no longer readable after updates were installed via httpupdate.

I use this function, which at least closes any open file with close() BEFORE starting the update.

void update_firmware() {

    updateMeasuring(false); // In this function currently running measuring is finished and the file is closed via file.close();
    
    WiFiClientSecure client;
    client.setInsecure();

    t_httpUpdate_return ret = httpUpdate.update(client, link_to_firmware_file);
    
    switch (ret) {
      case HTTP_UPDATE_FAILED:
        Serial.printf("HTTP_UPDATE_FAILED Error (%d): %s\n", httpUpdate.getLastError(), httpUpdate.getLastErrorString().c_str());
        break;

      case HTTP_UPDATE_NO_UPDATES:
        Serial.println("HTTP_UPDATE_NO_UPDATES");
        break;

      case HTTP_UPDATE_OK:
        Serial.println("OK");
        const char * httpType PROGMEM = "text/html";
        server.send_P(200, httpType, settingPage);
        break;
    }
}

Does this ensure that everything should run correctly again after the restart (sd.begin() in void setup)? Or would I have to add an SD.end()?

Or what exactly do you mean by "effectivly powering it down, in order to get it to work again"?

2

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.