# lwip-tcpip/lwip

lwIP mirror from http://git.savannah.gnu.org/cgit/lwip.git

Repository: https://github.com/lwip-tcpip/lwip
Canonical: https://ross.abutalabs.com/products/lwip-tcpip-lwip
Homepage: https://savannah.nongnu.org/projects/lwip/
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-06-16T06:17:17+00:00

## Health v2 (maintenance only)
Score: 71/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 87, release rhythm 35, longevity 100
- inputs: {"age_days": 2882, "days_push": 78, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1733, forks 616 (observed 2026-08-28T04:05:28.920549+00:00)

## What it is
lwIP is a lightweight, independent implementation of the TCP/IP protocol suite written in C, designed to minimize RAM and ROM usage. It provides full-scale TCP/IP networking (IPv4/IPv6, TCP, UDP, DHCP, DNS, TLS, MQTT, HTTP, and more) for embedded systems with only tens of kilobytes of free RAM.

## Use cases
- add TCP/IP networking to a microcontroller with limited RAM
- implement an embedded HTTP or MQTT client with TLS support
- run IPv6 and 6LoWPAN on resource-constrained IoT devices
- build a PPP over serial or Ethernet connection in firmware
- embed a small SNMP agent or SNTP client in a device
- use a Berkeley-like socket API on an RTOS without a full OS network stack

## When to choose
- you need a full TCP/IP stack on an embedded device with tens of KB of RAM
- you want IPv6, DHCP, DNS, and TLS support in a small footprint
- you are developing IoT firmware on platforms like ESP32 or STM32
- you need a mature, widely ported stack with an active developer community

## When to avoid
- you are writing a desktop or server application where a full OS network stack is available
- you need a high-level networking framework rather than a low-level protocol stack
- your platform cannot provide the ~40 KB of code ROM and porting layer lwIP requires

## Facets
- artifact type: library
- maturity: stable
- function: networking, embedded
- domain: embedded-systems, networking, iot
- platform: embedded, iot, c, cross-platform
- tags: tcp-ip-stack, lightweight, bsd-license, ipv6, iot-networking

## Member repositories
- lwip-tcpip/lwip (main) score 71

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:28.920549+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:31:27.586339+00:00, confidence not recorded.
  - readme: https://github.com/lwip-tcpip/lwip (fetched 2026-08-28T04:05:28.920549+00:00, sha e823903d7831)
  - homepage: https://savannah.nongnu.org/projects/lwip/ (fetched 2026-08-29T11:09:00.097736+00:00, sha 772dd094ab69)
  - site_page: https://savannah.nongnu.org/maintenance/FrontPage (fetched 2026-08-29T11:09:00.100820+00:00, sha ea4a64933f91)
  - site_page: https://savannah.nongnu.org/maintenance/back-page (fetched 2026-08-29T11:09:00.103110+00:00, sha 4041e43ed2a3)
- Data as of 2026-08-30T08:39:29.467469+00:00.