salus-it600-client 0.6.0b1

Asynchronous Python client for Salus iT600 local gateways

salus-it600-client

An asynchronous Python client for local control and monitoring of Salus iT600 smart home devices through UGE600 or UG800 gateways — thermostats, TRVs, smart plugs, roller shutters, sensors, and more, all without cloud dependency.

Features

Climate (thermostats & TRVs)

Device family	Capabilities
Standard heat-only iT600 / TRV devices	Heat/off/auto control model, active target temperature, battery level, 0.1 °C precision
SQ610 / SQ610RF Quantum	Off/heat modes, cool mode when the thermostat reports cooling support, Away / Permanent Hold / Follow Schedule presets, reported Schedule Override state, normalized humidity, floor temperature (external probe), battery level, 0.1 °C precision
FC600 fan-coil	Off/heat/cool modes, Follow Schedule / Permanent Hold / Eco presets when supported, reported Schedule Override state, fan modes (auto/high/medium/low/off), separate heating/cooling setpoints
TRV3RF	Heat/off/auto modes, valve opening %, battery (voltage curve), open-window detection, error code diagnostics

All thermostat families expose the same normalized climate model where their protocols overlap: hold/system/running state, active target temperature, active range, heat/cool setpoints when present, online status, and whitelisted support fields for diagnostics.

Sensors

Sensor	Source
Temperature	Standalone sensors (TS600, PS600) and thermostat readings
Humidity	SQ610 (SunnySetpoint_x100) and standalone multi-sensors
Floor temperature	SQ610 with external floor probe (OUTSensorProbe)
Battery	Status_d (SQ610RF) and voltage curves (TRV, window/door sensors)
Power (W)	Smart plug (sMeteringS) and energy meter ECM600 (sMeterS)
Energy (kWh)	Smart plug (sMeteringS) and energy meter ECM600 (sMeterS)

Binary sensors

Sensor	Source
Window / Door	SW600, OS600 (sIASZS)
Water leak	WLS600
Smoke	SmokeSensor-EM
TRV relay (heat)	it600MINITRV (sIT600I.RelayStatus)
Receiver relay	it600Receiver
Low battery	Diagnostic child on battery-powered sensors and TRVs
Thermostat problem	Aggregated error flags (Error01–Error32) with descriptions
Battery problem	Battery-specific error flags (battery models only)
Open window	TRV open-window detection (sComm.OpenWindowStatus)

Covers

Roller shutters and blinds (RS600): open, close, set position (0-100 %).

Switches

Smart plugs and relays (SP600, SPE600, SR600, and RS600 relay endpoints): on/off control. Dual-endpoint devices exposed as separate entities.

RS600 notes

RS600 is a multifunction physical device. Depending on gateway payloads and installation mode, it can expose a cover surface through sLevelS and separate relay switch endpoints through sOnOffS. The client keeps these capabilities separate so Home Assistant can decide how to present them.

Installation

pip install salus-it600-client

Usage

from salus_it600.gateway import IT600Gateway

async with IT600Gateway(host="192.168.1.100", euid="001E5E0D32906128") as gw:
    await gw.connect()
    await gw.poll_status()

    for device_id, device in gw.get_climate_devices().items():
        print(f"{device.name}: {device.current_temperature}°C → {device.target_temperature}°C")

    # Set temperature
    await gw.set_climate_device_temperature("device_001", 21.5)

Encryption & protocol support

Salus gateways encrypt all local API traffic. The library auto-detects the correct protocol by trying each one in order during connection.

	Legacy AES-CBC	AES-CCM (newer firmware)
Gateways	UGE600, older UG800 firmware	UG800 with newer firmware
Cipher	AES-256-CBC (fallback: AES-128-CBC)	AES-256-CCM (authenticated encryption)
Key derivation	MD5("Salus-{euid}") — static, derived from the gateway EUID	EUID bytes + hardcoded suffix — 32-byte key
IV / nonce	Fixed 16-byte IV	8-byte random nonce (3 random + 2-byte counter + 3-byte timestamp)
Authentication	None	8-byte MAC tag (CBC-MAC)
Padding	PKCS7	None (CCM handles arbitrary lengths)
Wire format	Block-aligned encrypted HTTP body	[ciphertext + 8-byte MAC][8-byte nonce]

Protocol auto-detection order:

1. AES-256-CBC — legacy iT600 / UGE600 gateways
2. AES-128-CBC — intermediate firmware variant
3. AES-CCM — newer UG800 firmware

Rejected attempts are identified by a characteristic 33-byte reject frame (trailer byte 0xAE).

Supported devices

SQ610RF, SQ610RF(WB), SQ610RFNH, SQ610RFNH(WB), FC600, TRV3RF, it600MINITRV, it600Receiver, SP600, SPE600, SR600, RS600, SW600, OS600, WLS600, SmokeSensor-EM, SD600, TS600, RE600, RE10B, PS600, ECM600.

Unsupported

Buttons (SB600, CSB600) — actions only work through the Salus Smart Home app.

Troubleshooting

• If you can't connect using the EUID on your gateway, try 0000000000000000 as EUID.
• Make sure Local WiFi Mode is enabled:
  1. Open the Salus Smart Home app and sign in.
  2. Double-tap your gateway to open the info screen.
  3. Press the gear icon to enter configuration.
  4. Check that Disable Local WiFi Mode is set to No.
  5. Save and power-cycle the gateway.

Development

python3 -m venv .venv
source .venv/bin/activate
python -m pip install -e ".[dev]"
python -m pytest
python -m ruff check .

See CONTRIBUTING.md for architecture details and contribution guidelines.

Migration from pyit600

This package replaces the unmaintained pyit600. Update imports:

# Old
from pyit600.gateway import IT600Gateway

# New
from salus_it600.gateway import IT600Gateway

License

Licensed under either the Apache License, Version 2.0 (LICENSE-APACHE) or the MIT License (LICENSE-MIT), at your option. See LICENSE and NOTICE for the license expression and attribution details.

Project origin

This project is a maintained fork of epoplavskis/pyit600. It incorporates protocol, device-support, and parser work from leonardpitzu/homeassistant_salus. Leonard Pitzu has since joined development here, and his fork has been retired.