pysamsung-dplug 0.5.0

Async client for old Samsung air conditioners using the DPLUG/AC14K protocol (TLS, port 2878)

pysamsung-dplug

Async Python client for old Samsung air conditioners that speak the legacy DPLUG / AC14K protocol over TLS on port 2878 (Wi-Fi modules such as SWL-B70F, used by the AR**HSFS generation, ~2013–2015).

These units were dropped by SmartThings. This library lets you control them locally again — no cloud. It is the protocol layer used by the samsung_ac_dplug Home Assistant integration, but works standalone.

Features

• Mutual-TLS handshake with the bundled Samsung client certificate (legacy TLS 1.0 / weak ciphers handled for you).
• Token acquisition (GetToken), authentication (AuthToken).
• Read full device state (DeviceState) and send commands (DeviceControl).
• Auto-discover the device id (DeviceList) and a passive async_probe().

Install

pip install pysamsung-dplug

Usage

import asyncio
from samsung_dplug import SamsungAcClient, build_ssl_context

async def main():
    ctx = build_ssl_context()                      # uses the bundled certificate
    client = SamsungAcClient("192.168.1.53", token="xxxxxxxx-....", ssl_context=ctx)
    state = await client.async_get_state()
    print("Power:", state["AC_FUN_POWER"], "Room:", state["AC_FUN_TEMPNOW"])
    await client.async_set("AC_FUN_POWER", "On")

asyncio.run(main())

Getting a token

The unit only issues a token at power-on (a physical proof-of-access step):

client = SamsungAcClient("192.168.1.53", ssl_context=ctx)
# turn the unit OFF, call this, then turn it ON within ~30 s:
token = await client.async_get_token()

build_ssl_context() does blocking file I/O; inside async frameworks run it in an executor (e.g. Home Assistant: await hass.async_add_executor_job(build_ssl_context)).

Protocol notes

Reverse-engineered from the official Smart Air Conditioner app and live devices. The unit greets with DPLUG-1.x, requires mutual TLS, and uses an XML request/response protocol. The DUID equals the Wi-Fi module MAC without separators. See the Home Assistant integration repo for the full write-up, including the undocumented APConnectionConfig Wi-Fi provisioning command.

License

MIT