Linux.mqtt

Geräte

Shelly Temperatur & Luftfeuchtigkeit

mosquitto_sub -t shellyhtg3-543204567354/status/humidity:0
mosquitto_sub -v -t shellyhtg3-543204567354/status/humidity:0 >>/var/log/mosquitto/humidity.log &

Shelly Stromzähler

mosquitto_sub -t shellypmminig3-84fce638c62c/status/pm1:0

per RPC den Energy Verbrauch auslesen

http://192.168.115.115/rpc/Shelly.GetStatus 
http://192.168.115.115/rpc/KVS.List

{
 "ble":{},
 "bthome":{ 
   "errors":["observer_disabled"]},
 "cloud":{"connected":true},
 "mqtt":{"connected":false},
 "pm1:0":{
   "id":0, 
   "voltage":237.4, 
   "current":0.679, 
   "apower":96.0 ,
   "freq":50.0,
   "aenergy":{
     "total":88939.057,  // 88,939057 kWh
     "by_minute": [1654.950,1654.950,1448.081],
     "minute_ts":1730759340},
   "ret_aenergy":{"total":0.000,"by_minute":[0.000,0.000,0.000],"minute_ts":1730759340}},
 "sys": { 
  "mac":"84FCE638C62C",
  "restart_required":false,
  "time":"23:29",
  "unixtime":1730759397,
  "uptime":952959,"ram_size":260232,"ram_free":85864,"fs_size":1048576,"fs_free":606208,"cfg_rev":13,"kvs_rev":0,"schedule_rev":0,"webhook_rev":2,"avail able_updates":{},"reset_reason":3},
  "wifi":{"sta_ip":"192.168.115.115","status":"got ip","ssid":"OrgaMon","rssi":-39},
  "ws":{"connected":false}}

• der Wert pm1:0:aenergy:total ist
  • Unsicher: nicht stromausfall fest, also wenn der Strom am Shelly ausfällt ist der Wert wieder "0"
  • Unsicher: ist Firmware-Update fest?
  • Unsicher: ist Gerät-Neustart fest?

mosquitto

#
# a MQTT broker is a 24/7 message relay/örtöö for topics
# it is not a database, the broker duplicates messages for all subscribers
# you can ask if you get notified if a topic of your interest changes (="subscribe")
# you can send out a message (="publish") so all subscribers get it
# The Broker is not persistent so values from "missed" messages can not be retrieved
# But, if a Client publish a value with a "retain"-Flag the Broker hold the value for a time
# after the publish by system A, if a client system B is a bit late - still unconnected, in the moment subscribing 
# to a retained message, system B gets the last known value stored by the broker. System B so 
# must not wait for the next live value, wich maybe come in minutes or hours
#

• installation

apt install mosquitto

• /etc/mosquitto/mosquitto.conf erweitern:

allow_anonymous false
password_file /etc/mosquitto/passwd
listener 1883 0.0.0.0

• user anlegen

mosquitto_passwd -c -b /etc/mosquitto/passwd user password

• neustart

systemctl restart mosquitto