"          DevEui"
              "        </td><td>";
    buffer << "          <input type=\"text\" readonly name=\"DevEui\" id=\"DevEui\" size=\"23\" value=\"";    
    for (int i = 0; i < 8; i++) {
        if (i != 0) {
            buffer << ":";
        }
        buffer << std::uppercase << std::setfill('0') << std::setw(2) << std::hex << (int)devEui[i];
    }
    buffer << "\"> (readonly)";
    buffer << "        </td>"
              "      </tr><tr>"
              "        <td>"
              "          AppEui"
              "        </td><td>";
    buffer << "          <input type=\"text\" name=\"AppEui\" id=\"AppEui\" size=\"23\" value=\"";    
    for (int i = 0; i < 8; i++) {
        if (i != 0) {
            buffer << ":";
        }
        buffer << std::uppercase << std::setfill('0') << std::setw(2) << std::hex << (int)myConfig.appEui[i];
    }
    buffer << "\">";
    buffer << "        </td>"
              "      </tr><tr>"
              "        <td>"
              "          AppKey"
              "        </td><td>";
    buffer << "          <input type=\"text\" name=\"AppKey\" id=\"AppKey\" size=\"47\" value=\"";    
    for (int i = 0; i < 16; i++) {
        if (i != 0) {
            buffer << ":";
        }
        buffer << std::uppercase << std::setfill('0') << std::setw(2) << std::hex << (int)myConfig.appKey[i];
    }
    buffer << "\">";