MQTT

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What

MQTT is pronounced 'mosquito' , ISO20922 describes it.

It's a simple messaging protocol with a publish/subscribe based model.

Where

I seems to run at 10.208.11.30 aka arbiter.vm.nurd.space. This is actually running on Jarvis. We kept the ip and name when we moved the services from Arbiter.

Whats it used for

Power Meter

The Power_Meter project publishes it's readings to the following topics;

#define MQTT_TOPIC_WATT "powermeter/watt"
#define MQTT_TOPIC_KWH "powermeter/kwh"
#define MQTT_TOPIC_PULSE "powermeter/pulsecount"

(from; https://github.com/NURDspace/kwhMeter/blob/master/src/config.h_sample)

temperature/humidity

  • DASTEMPERATUR: zaal 1
  • DASTEMPERATUR2: gamers room
  • DASTEMPERATURbar: bar
  • DASTEMPERATURplee: women's toilet

Used topics

power/main/pulsecount 1441113
power/main/kwh 3842.968
power/main/watt 235
space/state 0
space/grotezaal/rechts/1 off
space/grotezaal/rechts/1/stat off
space/hal/rechts/1 off
space/hal/rechts/1/stat off
space/bar/1 off
space/bar/1/stat off
space/makerhoek/1 off
space/makerhoek/1/stat off
stat/sonoff/POWER ON
stat/audioamp/POWER OFF
sonoff/POWER ON
sonoff/audioamp/POWER ON
tele/audioamp/LWT Online
cmnd/audioamp/POWER OFF
tele/audioamp/STATE {"Time":"2017-12-06T14:26:44", "Uptime":1845, "Vcc":3.182, "POWER":"OFF", "Wifi":{"AP":2, "SSID":"NurdSpace", "RSSI":88, "APMac":"18:64:72:71:FD:21"}}
tele/audioamp/ENERGY {"Time":"2017-12-06T14:26:44", "Total":142.625, "Yesterday":0.393, "Today":0.037, "Period":0, "Power":0, "Factor":0.00, "Voltage":0, "Current":0.000}
DASTEMPERATUR2 { "epoch":1533487686, "temperature":  28.0, "humidity":  18.4 }
DASTEMPERATURbar { "epoch":1533487706, "temperature":  29.0, "humidity":  34.0 }
DASTEMPERATUR { "epoch":1533487707, "temperature":  32.6, "humidity":  29.0 }
DASTEMPERATURplee { "epoch":1533487710, "temperature":  30.0, "humidity":  27.0 }
 
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