projects:mqtt [c-base coredump wiki]

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====== c-beam MQTT ======

MQTT is a machine-to-machine (M2M)/"Internet of Things" connectivity protocol. see: http://mqtt.org

We are running a mqtt server on c-beam.cbrp3.c-base.org on port 1883. It's only reachable from the internal network.

An up-to-date listing of artefacts and their topics can be found from https://github.com/c-base/c-flo/tree/master/participants

The content of the current participant folder (updated by running a __grunt createMarkup__ command in c-flo)
^ artifact ^ description ^ inports topic ^ outports topic^ 
|barstatus |c-base bar status switch| n/a |**state**: bar/state \\ **stateful**: bar/stateful \\ **status**: bar/status|
|[[https://github.com/c-base/c_out|c_out]] |Generate sounds| n/a |**playsound**: c_out/play \\ **playrandomsound**: c_out/loop \\ **saytext**: c_out/Julia \\ **saytext_en**: c_out/announce_en|
|crew |station crew register| n/a |**boarding**: user/boarding \\ **crew**: c-base/crew \\ **members**: c-base/crew/members \\ **passive**: c-base/crew/passive \\ **updated**: c-base/crew/last_update|
|[[https://github.com/c-base/ingress-table|ingress-portal]] |Portal status via Ingress Table| n/a |**status**: ingress/status/+|
|nerdctrl |c-base nerd control interface| n/a |**openurl**: nerdctrl/open|
|pedestrianlight |pedestrian traffic light|**colors**: ampel/#ROLE| n/a |
|playsound |Play sounds|**playsound**: c_out/play \\ **playrandomsound**: c_out/loop \\ **saytext**: c_out/Julia \\ **saytext_en**: c_out/announce_en| n/a |
|powermon |station power usage monitoring| n/a |**out**: system/powermon \\ **load**: system/powermon/load \\ **counter**: system/powermon/counter \\ **updated**: system/powermon/last_update|
|showurl |Display web page in a screen|**show**: #ROLE/open| n/a |
|statuslight |bar status light indicating openness|**barstatus**: bar/stateful| n/a |
|time |c-base station time| n/a |**time**: info/time|

Currently there are the following topics:

^ topic                      ^ interval   ^ description ^
|ampel/mainhall                 |  n/a       | wie, ampel nerd, aber zusätzlich noch mit Gelb: {"red": 1, "green": 1, "yellow": 1} |
|ampel/nerd                     |  n/a       | Beispiel JSON-Daten für die Message: '{"red": 1, "green": 0}' |
|c-base/crew                    | 15 minutes | all of the below crew data |
|c-base/crew/members            | 15 minutes | crew member count |
|c-base/crew/last_update        | 15 minutes | ISO timestamp of the last update of the power data |
|c-base/crew/passive            | 15 minutes | number of passive members |
|c_out/loop                     | 10 minutes | starts a new sound loop on c_out |
|c_out/play                     |  n/a       | playload plays various sound samples |
|c_out/Julia                    |  n/a       | playload plays announcements on c_out via tts with voice Julia|
|client/echelon                 |  n/a       | this is a retained topic, if it is available, the traffic stats script on echelon is running |
|info/time                      |  1 minute  | current date and time |
|ingress/status/+               |  n/a       | these are retained topics and show status of the ingres portals around the c-base |
|nerdctrl/open                  |  n/a       | opens the payload URL in a browser in the nerdarea |
|system/echelon/traffic         |  1 minute  | average incoming and outgoing traffic on ipb and kdg lines from echelon in bytes/s since last message |
|system/powermon                | 15 seconds | all of the below power data |
|system/powermon/counter        | 15 seconds | estimated power meter counter |
|system/powermon/last_update    | 15 seconds | ISO timestamp of the last update of the power data |
|system/powermon/load           | 15 seconds | current (estimated) power load in watts |
|system/powermon/load_low       | 15 seconds | lowest power load in watts |
|system/powermon/load_low_date  | 15 seconds | date lowest power load in watts was seen last |
|system/powermon/load_high      | 15 seconds | highest power load in watts |
|system/powermon/load_high_date | 15 seconds | date highest power load in watts was seen last |
|system/powermon/raw            | 15 seconds | raw data from the LS110 |
|user/boarding                  |  n/a       | triggered when a member logs in, message contains the username in JSON format |
====== mqtt-sender ======

The topics from echelon are published with a small lua daemon, which can be easily extended.
Check it out from: https://github.com/c-base/mqtt-sender
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