Espressif ESP32-S2 User Manual

Chapter 2. API Reference
Range:
• from 1 to 3600
Default value:
• 60
CONFIG_LWIP_DHCPS_MAX_STATION_NUM
Maximum number of stations
Found in: Component config > LWIP > DHCP server > CONFIG_LWIP_DHCPS
The maximum number of DHCP clients that are connected to the server. After this number is exceeded,
DHCP server removes of the oldest device from it’s address pool, without notification.
Range:
• from 1 to 64
Default value:
• 8
CONFIG_LWIP_AUTOIP
Enable IPV4 Link-Local Addressing (AUTOIP)
Found in: Component config > LWIP
Enabling this option allows the device to self-assign an address in the 169.256/16 range if none is assigned
statically or via DHCP.
See RFC 3927.
Default value:
• No (disabled)
Contains:
• CONFIG_LWIP_AUTOIP_TRIES
• CONFIG_LWIP_AUTOIP_MAX_CONFLICTS
• CONFIG_LWIP_AUTOIP_RATE_LIMIT_INTERVAL
CONFIG_LWIP_AUTOIP_TRIES
DHCP Probes before self-assigning IPv4 LL address
Found in: Component config > LWIP > CONFIG_LWIP_AUTOIP
DHCP client will send this many probes before self-assigning a link local address.
From LWIP help: “This can be set as low as 1 to get an AutoIP address very quickly, but you should
be prepared to handle a changing IP address when DHCP overrides AutoIP.”(In the case of ESP-IDF,
this means multiple SYSTEM_EVENT_STA_GOT_IP events.)
Range:
• from 1 to 100 if CONFIG_LWIP_AUTOIP
Default value:
• 2 if CONFIG_LWIP_AUTOIP
CONFIG_LWIP_AUTOIP_MAX_CONFLICTS
Max IP conflicts before rate limiting
Found in: Component config > LWIP > CONFIG_LWIP_AUTOIP
If the AUTOIP functionality detects this many IP conflicts while self-assigning an address, it will go into
a rate limited mode.
Espressif Systems 1166
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Espressif ESP32-S2 Specifications

General

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