[](https://github.com/astral-sh/ruff)
## Overview
**ramses_rf** is a client library/CLI utility used to interface with some Honeywell-compatible HVAC & CH/DHW systems that use 868MHz RF, such as:
- (Heat) **evohome**, **Sundial**, **Hometronic**, **Chronotherm**
- (HVAC) **Itho**, **Orcon**, **Nuaire**
It requires a USB-to-RF device, either a Honeywell HGI80 (somewhat rare, expensive) or something running the [evofw3](https://github.com/ghoti57/evofw3) firmware, such as the one from [here](https://indalo-tech.onlineweb.shop/).
It does three things:
- decodes RAMSES II-compatible packets and converts them into useful JSON
- builds a picture (schema, config & state) of evohome-compatible CH/DHW systems - either passively (by eavesdropping), or actively (probing)
- allows you to send commands to CH/DHW and HVAC systems, or monitor for state changes
- allows you to emulate some hardware devices
For CH/DHW, the simplest way to know if it will work with your system is to identify the box connected to your boiler/HVAC appliance as one of:
- **R8810A**: OpenTherm Bridge
- **BDR91A**: Wireless Relay (also BDR91T)
- **HC60NG**: Wireless Relay (older hardware)
Other systems may well work, such as some Itho Dallderop HVAC systems, use this protocol, YMMV.
It includes a CLI and can be used as a standalone tool, but also is used as a client library by:
- [ramses_cc](https://github.com/zxdavb/ramses_cc), a Home Assistant integration
- [evohome-Listener](https://github.com/smar000/evohome-Listener), an MQTT gateway
## Installation
```
git clone https://github.com/zxdavb/ramses_rf
cd ramses_rf
pip install -r requirements.txt
```
The CLI is called client.py:
```
python client.py monitor /dev/ttyUSB0 -o packet.log
```
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