esp-aliyun 版本很老了，不支持该 topic，你可以使用该工程，https://github.com/espressif/esp-ali-smartliving，这个支持 {"identifier":"awss.BindNotify","value":{"Operation":"Unbind"}}

看不出原因，你换个串口工具试试呢。

调用的地方在 wifi lib 内部，看不到。清楚该信息可以通过擦除 flash 重新烧录，或者试一下 esp_wifi_set_config(WIFI_IF_STA, &wifi_config)；wifi_config 定义为空的结构体，来覆盖原来的配置信息。

Wifi 内部默认会把 ssid 和密码存 NVS 里面，你可以看下 esp_wifi_set_storage 这个函数，默认是存 flash 里面的。

你试一下把 wifi 的 power save 关了，esp_wifi_set_ps(0)，可以打印下返回值看看有没有生效。对于 TCP，你可以设置 socket option TCP_NODELAY.
如果这个试了还不行，你把 wifi 的 RX,TX AMPDU 也关了，通过 menuconfig(Component config->Wi-Fi->WiFi AMPDU TX/RX)

Do the log `Set SO_LINGER success` print in your console? Could you please share your log.

Why IDF v4.4 does not has this issue? Is default setting of CONFIG_LWIP_SO_LINGER changed for v5.0? Because in IDF v4.4, the lwip core will auto-free the time-wait state TCP pcb when TCP pcb number over the max TCP pcb number in https://github.com/espressif/esp-lwip/blob/2749568fe15df2003f6c3f37f0d...

You need first enable CONFIG_LWIP_SO_LINGER by menuconfig. While I was testing the code, CONFIG_LWIP_SO_LINGER was enabled in both IDF4.4 and IDF5.0. Thanks for your attention to the issue. But when i enable `CONFIG_LWIP_SO_LINGER `, it works normal in IDF v5.0. If not enable it, the momery will re...

It seems TCP enter in TIME-WAIT state, it neend about2 miniutes to free the resources. And SO_LINGER socket option you set not take effect. You need first enable CONFIG_LWIP_SO_LINGER by menuconfig. Why IDF v4.4 does not has this issue? Is default setting of CONFIG_LWIP_SO_LINGER changed for v5.0? ...

0x4290 means MBEDTLS_ERR_RSA_PUBLIC_FAILED(0x4280) + MBEDTLS_ERR_MPI_ALLOC_FAILED(0x0010). Maybe you're running out of memory.