请确认波特率和串口号选择正确。

还有其他板子吗，可以尝试换个试试。

请按照上述操作，请在串口终端中，查看是否出现如下打印，判断是否进入下载模式。 [15:32:18:342] rst:0x1 (POWERON_RESET),boot:0x3 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))␍␊ [15:32:18:342] waiting for download␍␊ [15:32:18:761] ets Jun 8 2016 00:22:57␍␊ [15:32:18:761] ␍␊ [15:32:18:761] rst:0x1 (POWERON_RESET),boot:0x3 (DOWNLOAD_BOOT(UART0/...

Ok, please try to use the IDF ble example in the MDF directory.

你可以手动让设备进入下载模式，之后进行下载烧录，方法：
1. 按住 boot 按键不放，再按下 en 按键
2. 随后松开 en 按键，之后松开 boot按键

Please check that the IDF version of the BLE example is the same as the IDF version of the MDF firstly.
Use `git log` command under IDF directory to get version(commit id)。

Yeah, ESP-IDF currently implements TCP/IP Adapter for the lwIP TCP/IP stack. Please choose functions to resolve hostname to get ip address. Example: gethostbyname、getaddrinfo.

Please search function name on GooGle for details.

Oh, There are many debug tool. For example: packetsender

1. FIrstly, please use tcp/udp debug tool to connect your tcp server. If this ok, then use ESP32 to connect your tcp server under correct configuration.
2. You can refer to no_router example under mdf example directory. According to README.md(The document isn't perfect) to configure device type.

Hi huybk213,
Thank you for feedback.
I think you can talk about this on lvgl forum or lvgl github. There are same question on github.
Thanks.

根据这个日志，暂时无法分析出结果。
1. 你可以多尝试一些。
2. 提供更多的信息给我们分析