From HFML-FELIX Wiki
| MQTT daemon | |
 | |
| Publishes FELIX undulator netgate to MQTT | |
| Language | Python |
|---|---|
| Hosts | felix-control, pi1 |
| Repository | Science gitlab |
Reads the FELIX undulator netgate and pushes this information to the database and also publishes it on the MQTT broker.
MQTT
[edit | edit source]statusses
[edit | edit source]to be cleaned up
| Topic | Description | Values |
|---|---|---|
| FELIX/undulator/active | active FEL undulator number | integer, 1 or 2 |
| FELIX/undulator/gap | active FEL undulator gap | float (mm) |
| FELIX/undulator/moving | active FEL undulator moving? | boolean, True or False |
| FELIX/undulator/offset | active FEL taper/offset between upstream and downstream axes | float (mm) |
| FELIX/undulator/scan_status | deprecated | 0 |
| FELIX/undulator/wavelength | active FEL wavelength | float (µm) |
| FELIX/undulator/wavenumbers | active FEL wavenumbers | float (cm-1) |
| FELIX/undulator/1/gap | FEL1 undulator gap | float (mm) |
| FELIX/undulator/1/moving | FEL1 undulator moving? | boolean, True or False |
| FELIX/undulator/1/offset | FEL1 taper between upstream and downstream axes | float (mm) |
| FELIX/undulator/1/scan_status | deprecated | 0 |
| FELIX/undulator/1/wavelength | FEL1 wavelength | float (µm) |
| FELIX/undulator/1/wavenumbers | FEL1 wavenumbers | float (cm-1) |
| FELIX/undulator/2/gap | FEL2 undulator gap | float (mm) |
| FELIX/undulator/2/moving | FEL2 undulator is moving? | boolean, True or False |
| FELIX/undulator/2/scan_status | deprecated | 0 |
| FELIX/undulator/2/offset | FEL2 offset between upstream and downstream sections | float (mm) |
| FELIX/undulator/2/wavelength | FEL2 radiation wavelength | float (µm) |
| FELIX/undulator/2/wavenumbers | FEL2 wavenumbers | float (cm-1) |
| FELIX/undulator/daemon_time | active daemon time | unix timestamp |
| FELIX/undulator/servers/host_pid | server declaration | json formatted text {"startdate": "date time", "state": "active or passive", "hostname": "hostname", "pid": pid} |
| FELIX/undulator/clients/host_pid | client declaration Note: published by clients, not by this daemon |
json formatted text {"hostname": "hostname", "pid": pid,"state":"master or slave","subsystem":"undulator","starttime":timestamp} |
| FELIX/undulator/daemon_time | system time of the host the daemon runs on | unix timestamp (e.g. 1550680653.91) |
| FELIX/undulator/daemon_time/readable | system time of the host the daemon runs on | human-readable timestamp (e.g. Wed Feb 20 17:37:59 2019) |
commands
[edit | edit source]| Topic | Description | Values |
|---|---|---|
| FELIX/undulator/wavelength/set | active FEL undulator radiation wavelength | float (µm) |
| FELIX/undulator/1/wavelength/set | FEL1 radiation wavelength | float (µm) |
| FELIX/undulator/2/wavelength/set | FEL2 radiation wavelength | float (µm) |
| FELIX/undulator/1/wavelength/setpoint | deprecated | float (µm) |
| FELIX/undulator/2/wavelength/setpoint | deprecated | float (µm) |
| FELIX/undulator/mm/set | move active FEL undulator to gap in mm | float (mm) |
| FELIX/undulator/1/mm/set | move FEL1 undulator to gap in mm | float (mm) |
| FELIX/undulator/2/mm/set | move FEL2 undulator to gap in mm | float (mm) |
Installation
[edit | edit source]First, make sure you have set up Feloperator gitlab authentication for the git clone and pip install commands below to work.
# clone the undulatord code cd /opt git clone https://gitlab.science.ru.nl/felix/undulatord.git cd undulatord chgrp -R fft . chmod -R 2775 .git mkdir log run chmod 2775 log run python3 -m venv .env .env/bin/pip install -r requirements.txt
