Espressif ESP32-S2 User Manual

Chapter 2. API Reference
• CONFIG_LWIP_NETIF_LOOPBACK
• TCP
• CONFIG_LWIP_TCPIP_TASK_AFFINITY
• CONFIG_LWIP_TCPIP_TASK_STACK_SIZE
• CONFIG_LWIP_TCPIP_RECVMBOX_SIZE
• UDP
• CONFIG_LWIP_IPV6_RDNSS_MAX_DNS_SERVERS
CONFIG_LWIP_LOCAL_HOSTNAME
Local netif hostname
Found in: Component config > LWIP
The default name this device will report to other devices on the network. Could be updated at runtime
with esp_netif_set_hostname()
Default value:
•“espressif”
CONFIG_LWIP_NETIF_API
Enable usage of standard POSIX APIs in LWIP
Found in: Component config > LWIP
If this feature is enabled, standard POSIX APIs: if_indextoname(), if_nametoindex() could be
used to convert network interface index to name instead of IDF specific esp-netif APIs (such as
esp_netif_get_netif_impl_name())
Default value:
• No (disabled)
CONFIG_LWIP_TCPIP_CORE_LOCKING
Enable tcpip core locking
Found in: Component config > LWIP
If Enable tcpip core locking,Creates a global mutex that is held during TCPIP thread operations.Can
be locked by client code to perform lwIP operations without changing into TCPIP thread using callbacks.
See LOCK_TCPIP_CORE() and UNLOCK_TCPIP_CORE().
If disable tcpip core locking,TCP IP will perform tasks through context switching．
Default value:
• No (disabled)
CONFIG_LWIP_DNS_SUPPORT_MDNS_QUERIES
Enable mDNS queries in resolving host name
Found in: Component config > LWIP
If this feature is enabled, standard API such as gethostbyname support .local addresses by sending one
shot multicast mDNS query
Default value:
• Yes (enabled)
Espressif Systems 1159
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Release v4.4

Espressif ESP32-S2 Specifications

General

Brand	Espressif
Model	ESP32-S2
Category	Single board computers
Language	English