The documentation on MQTT2 is decribing how to use actions with the new binding.
When using this, I do get an unexpected behaviour when having more than one broker.
Depending on the sequence in the code, the messages are send to the wrong broker.
The following rule works as expected:
// mqtttest.rules
// https://www.openhab.org/blog/2018-12-16-mqtt-arrives-in-the-modern-openhab-2-x-architecture.html
val String filename = "mqtttest.rules"
//----------------------------------------------------------------------------------------------------------------------
rule "MQTT test"
when
Item MQTT_Test_switch changed from OFF to ON
then
val myBroker20 = getActions("mqtt","mqtt:broker:MqttPandora20")
logInfo(filename, "myBroker20.publishMQTT")
myBroker20.publishMQTT ("house/test", "myBroker20")
val myBroker75 = getActions("mqtt","mqtt:broker:MqttOpenHAB75")
logInfo(filename, "myBroker75.publishMQTT")
myBroker75.publishMQTT ("house/test", "myBroker75")
// RESULT: Messages are send to the correct broker
end
In the next example both messages are send to the second broker:
//----------------------------------------------------------------------------------------------------------------------
rule "MQTT test"
when
Item MQTT_Test_switch changed from ON to OFF
then
val myBroker20 = getActions("mqtt","mqtt:broker:MqttPandora20")
val myBroker75 = getActions("mqtt","mqtt:broker:MqttOpenHAB75")
logInfo(filename, "myBroker20.publishMQTT")
myBroker20.publishMQTT ("house/test", "myBroker20")
logInfo(filename, "myBroker75.publishMQTT")
myBroker75.publishMQTT ("house/test", "myBroker75")
// RESULT: Both Messages are send to the second broker
end
The brokers are defined in a separate .thing file:
// bridge.things
Bridge mqtt:broker:MqttPandora20 "MQTT Broker Pandora" @ "MQTT Pandora" [
host="192.168.1.20",
port=1883,
secure="AUTO",
qos=0,
retain=false,
clientid="Oh2Mqtt2Thing20",
keep_alive_time=30000,
reconnect_time=60000,
username="mqttusr20",
password="mqttpass20"
]
// Bridge mqtt:broker:MqttOpenHAB [ host="localhost", port=1883, secure="AUTO", username="openhab", password="nxt2008" ]
Bridge mqtt:broker:MqttOpenHAB75 "MQTT Broker OpenHAB" @ "MQTT OpenHAB" [
host="192.168.1.75",
port=1883,
secure="AUTO",
qos=0,
retain=false,
clientid="Oh2Mqtt2Thing75",
keep_alive_time=30000,
reconnect_time=60000,
username="mqttusr75",
password="mqttpass75"
]
May be I am interpreting the documentation incorrectly as I was assuming that the two instances are independent.
