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Z21 protocol for open LAN interface
readme
# Z21
[](https://github.com/ZIMO-Elektronik/Z21/actions/workflows/build.yml) [](https://github.com/ZIMO-Elektronik/Z21/actions/workflows/tests.yml) [](https://github.com/ZIMO-Elektronik/Z21/raw/master/LICENSE)
<img src="https://github.com/ZIMO-Elektronik/Z21/raw/master/data/images/logo.png" width="15%" align="right">
The [ROCO](https://www.roco.cc/ren/) [Z21](https://www.z21.eu/en) is a command station with support for LocoNet, R-Bus and XpressNet devices. It has an open LAN interface with a well-documented protocol that has been continuously developed since then. This C++ library of the same name contains platform-independent code for the server-side (i.e. the part that runs on a command station) implementation of the protocol.
<details>
<summary>Table of Contents</summary>
<ol>
<li><a href="#protocol">Protocol</a></li>
<li><a href="#features">Features</a></li>
<li><a href="#getting-started">Getting Started</a></li>
<ul>
<li><a href="#prerequisites">Prerequisites</a></li>
<li><a href="#installation">Installation</a></li>
<li><a href="#build">Build</a></li>
</ul>
<li><a href="#usage">Usage</a></li>
<ul>
<li><a href="#server">Server</a></li>
</ul>
</ol>
</details>
## Protocol
The official documentation of the protocol can be downloaded from the ROCO homepage in English and German.
| English | German |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| [Z21 LAN protocol V1.13](https://www.z21.eu/media/Kwc_Basic_DownloadTag_Component/root-en-main_47-1652-959-downloadTag-download/default/d559b9cf/1699290380/z21-lan-protokoll-en.pdf) | [Z21 LAN Protokoll V1.13](https://www.z21.eu/media/Kwc_Basic_DownloadTag_Component/47-1652-959-downloadTag/default/69bad87e/1699290251/z21-lan-protokoll.pdf)|
## Features
- Platform-independent
- Fine grained interfaces (implement only what you need)
- Examples for Linux, Windows and ESP32
## Getting Started
### Prerequisites
- C++23 compatible compiler
- [CMake](https://cmake.org/) ( >= 3.25 )
- Optional
- for building [ESP32](https://www.espressif.com/en/products/socs/esp32) example
- [ESP-IDF](https://github.com/espressif/esp-idf) ( >= 5.0.3 )
### Installation
This library is meant to be consumed with CMake,
```cmake
# Either by including it with CPM
cpmaddpackage("gh:ZIMO-Elektronik/Z21@0.1.0")
# or the FetchContent module
FetchContent_Declare(
DCC
GIT_REPOSITORY "https://github.com/ZIMO-Elektronik/Z21"
GIT_TAG v0.1.0)
target_link_libraries(YourTarget PRIVATE Z21::Z21)
```
or, on [ESP32 platforms](https://www.espressif.com/en/products/socs/esp32), with the [IDF Component Manager](https://docs.espressif.com/projects/idf-component-manager/en/latest/) by adding it to a `idf_component.yml` file.
```yaml
dependencies:
zimo-elektronik/z21:
version: "0.1.0"
```
### Build
The library itself is header-only, so technically it can't be built. However, if run as top-level CMake project then, depending on the target platform, different examples can be built.
#### Host
On host platforms a simulator example running a Z21 server can be built.
```sh
cmake -Bbuild
cmake --build build --target Z21Sim
```
The simulator allows you to try out the library directly in a simple GUI. The application starts a Z21 server to which you can connect directly via [Z21 app](https://www.z21.eu/en/products/z21-app). You can then control locomotives, switch turnouts or simulate various errors such as a short circuit.
#### ESP32
On [ESP32 platforms](https://www.espressif.com/en/products/socs/esp32) examples from the [examples](https://github.com/ZIMO-Elektronik/DCC/raw/master/examples) subfolder can be built directly using the [IDF Frontend](https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/tools/idf-py.html).
```sh
idf.py create-project-from-example "zimo-elektronik/z21^0.1.0:esp32"
```
## Usage
### Server
| Interface | Responsibility |
| --------------------- | ---------------------------------------------------------------------- |
| Can | Send and receive messages from CAN occupancy detectors |
| Driving | Control mobile decoders |
| FastClock | Control fast clock |
| LocoNet | Send and receive messages from LocoNet gateway |
| Programming | Reading and writing decoder CVs in service or POM mode |
| RailCom | Reading RailCom data of mobile decoders |
| RBus | Send and receive messages from R-Bus feedback modules |
| Settings | Change persistently stored settings |
| Switching | Control accessory decoders |
| System (**required**) | System features (e.g. track power, get hardware information, ...) |
| ZLink | Send and receive messages from zLink devices |
| | |
| Logging | Print received and transmitted UDP datasets (not part of Z21 protocol) |
## All Commands
| Command | Reply | Broadcast |
| ---------------------------- | ----------------------------------- | ---------------------------- |
| lanGetSerialNumber | replyToLanGetSerialNumber | |
| lanGetCode | replyToLanGetCode | |
| lanGetHwInfo | replyToLanGetHwInfo | |
| lanLogoff | - | |
| lanXGetVersion | replyToLanXGetVersion | |
| lanXGetStatus | lanXStatusChanged | |
| lanXSetTrackPowerOff | lanXBcTrackPowerOff | lanXBcTrackPowerOff |
| lanXSetTrackPowerOn | lanXBcTrackPowerOn | lanXBcTrackPowerOn |
| lanXDccReadRegister | lanXCv[NackSc\|Nack\|Result] (n.a.) | lanXBcProgrammingMode (n.a.) |
| lanXCvRead | lanXCv[NackSc\|Nack\|Result] | lanXBcProgrammingMode |
| lanXDccWriteRegister | lanXCv[NackSc\|Nack\|Result] (n.a.) | lanXBcProgrammingMode (n.a.) |
| lanXCvWrite | lanXCv[NackSc\|Nack\|Result] | lanXBcProgrammingMode |
| lanXMmWriteByte (n.a.) | lanXCv[NackSc\|Nack\|Result] (n.a.) | lanXBcProgrammingMode (n.a.) |
| lanXGetTurnoutInfo | | |
| lanXGetExtAccessoryInfo | | |
| lanXSetTurnout | | |
| lanXSetExtAccessory | | |
| lanXSetStop | lanXBcStopped | |
| lanXSetLocoEStop | | lanXLocoInfo |
| lanXPurgeLoco | - | |
| lanXGetLocoInfo | lanXLocoInfo | |
| lanXSetLocoDrive | - | lanXLocoInfo |
| lanXSetLocoFunction | - | lanXLocoInfo |
| lanXSetLocoFunctionGroup | - | lanXLocoInfo |
| lanXSetLocoBinaryState | - | |
| lanXCvPom | lanXCv[NackSc\|Nack\|Result] | |
| lanXCvPomAccessory | lanXCv[NackSc\|Nack\|Result] | |
| lanXGetFirmwareVersion | replyToLanXGetFirmwareVersion | |
| lanSetBroadcastFlags | - | |
| lanGetBroadcastFlags | replyToLanGetBroadcastFlags | |
| lanGetLocoMode | replyToLanGetLocoMode | |
| lanSetLocoMode | - | |
| lanGetTurnoutMode | replyToLanGetTurnoutMode | |
| lanSetTurnoutMode | - | |
| lanRmBusGetData | | |
| lanRmBusProgramModule | | |
| lanSystemStateGetData | lanSystemStateDataChanged | |
| lanRailComGetData | lanRailComDataChanged | |
| lanLocoNetFromLan | | |
| lanLocoNetDispatchAddr | | |
| lanLocoNetDetector | | |
| lanCanDetector | | |
| lanCanDeviceGetDescription | | |
| lanCanDeviceSetDescription | | |
| lanCanBoosterSetTrackPower | | |
| lanFastClockControl | | |
| lanFastClockSettingsGet | | |
| lanFastClockSettingsSet | | |
| lanBoosterSetPower | | |
| lanBoosterGetDescription | | |
| lanBoosterSetDescription | | |
| lanBoosterSystemStateGetData | | |
| lanDecoderGetDescription | | |
| lanDecoderSetDescription | | |
| lanDecoderSystemStateGetData | | |
| lanZLinkGetHwInfo | | |
## Broadcasts
| Broadcast |
| ----------------------------------- |
| lanXTurnoutInfo |
| lanXExtAccessoryInfo |
| lanXBcTrackPowerOff |
| lanXBcTrackPowerOn |
| lanXBcProgrammingMode |
| lanXBcTrackShortCircuit |
| lanXBcStopped |
| lanXLocoInfo |
| lanRmbusDataChanged |
| lanSystemStateDataChanged |
| lanRailComDataChanged |
| lanCanBoosterSystemStateDataChanged |
| lanBoosterSystemStateDataChanged |
| lanDecoderSystemStateDataChanged |
Links
- Homepage
- Documentation
-
Repository
2f6d5662e4a5cc634ff3c1a40b2b61a178c302ce
- Issues
Supports all targets
Maintainer
- Vincent Hamp <hamp@zimo.at>
License: MPL-2.0
To add this component to your project, run:
or
download archive
idf.py add-dependency "zimo-elektronik/z21^0.1.1"
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