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1803
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1 --- |
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2 labels: |
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3 - 'Stage-Beta' |
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4 summary: 'MQTT interface to Prosody''s pubsub' |
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5 ... |
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6 |
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7 Introduction |
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8 ------------ |
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9 |
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10 [MQTT](http://mqtt.org/) is a lightweight binary pubsub protocol suited |
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11 to embedded devices. This module provides a way for MQTT clients to |
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12 connect to Prosody and publish or subscribe to local pubsub nodes. |
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13 |
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14 Details |
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15 ------- |
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16 |
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17 MQTT has the concept of 'topics' (similar to XMPP's pubsub 'nodes'). |
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18 mod\_pubsub\_mqtt maps pubsub nodes to MQTT topics of the form |
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19 `HOST/NODE', e.g.`pubsub.example.org/mynode\`. |
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20 |
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21 ### Limitations |
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22 |
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23 The current implementation is quite basic, and in particular: |
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24 |
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25 - Authentication is not supported |
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26 - SSL/TLS is not supported |
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27 - Only QoS level 0 is supported |
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28 |
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29 ### Payloads |
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30 |
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31 XMPP payloads are always XML, but MQTT does not define a payload format. |
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32 Therefore mod\_pubsub\_mqtt will attempt to convert data of certain |
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33 recognised payload types. Currently supported: |
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34 |
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35 - JSON (see [XEP-0335](http://xmpp.org/extensions/xep-0335.html) for |
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36 the format) |
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37 - Plain UTF-8 text (wrapped inside |
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38 `<data xmlns="https://prosody.im/protocol/mqtt"/>`) |
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39 |
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40 All other XMPP payload types are sent to the client directly as XML. |
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41 Data published by MQTT clients is currently never translated, and always |
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42 treated as UTF-8 text. |
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43 |
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44 Configuration |
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45 ------------- |
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46 |
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47 There is no special configuration for this module. Simply load it on |
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48 your pubsub host like so: |
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49 |
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50 Component "pubsub.example.org" "pubsub" |
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51 modules_enabled = { "pubsub_mqtt" } |
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52 |
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53 You may also configure which port(s) mod\_pubsub\_mqtt listens on using |
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54 Prosody's standard config directives, such as `mqtt_ports`. Network |
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55 settings **must** be specified in the global section of the config file, |
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56 not under any particular pubsub component. The default port is 1883 |
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57 (MQTT's standard port number). |
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58 |
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59 Compatibility |
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60 ------------- |
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61 |
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62 ------- -------------- |
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63 trunk Works |
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64 0.9 Works |
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65 0.8 Doesn't work |
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66 ------- -------------- |
