node id not shown in node dropdown

[wurststulle]

hey, i am trying this module with config based on the example from homieiot.github.io. it seems, as the node is not parsed correctly, or i am using it wrong. maybe someone can give some advice whats wrong here. `mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/$homie" -m "4.0" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/$name" -m "SwitchController" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/$nodes" -m "switch-sensor" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/$state" -m "ready"

mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/switch-sensor/$name" -m "SwitchSensor1" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/switch-sensor/$properties" -m "sw0"

mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/switch-sensor/sw0" -m "off" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/switch-sensor/sw0/$name" -m "state" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/switch-sensor/sw0/$datatype" -m "enum" mosquitto_pub -h 192.168.x.x -t "homie/switch-controller/switch-sensor/sw0/$format" -m "on,off"`

the node switch-sensor is not shown in node dropdown.

[Christian-Me]

Hi, I see (only one )problem.

• 1st and most important the messages have to be send as retained messages. see here QoS and retained messages
• if you are using a small micro and unable to send your messages with QoS=2 or 1 (i.e. if you are using the pubsub library) you can configure mosquitto to accept and store retained messages see here. In default configuration mosquitto retaines messages sent QoS=0 messages but do not save them.
• For testing use -q 2 -r
• $type is not specified (see 5.2.1 of the convention)

[wurststulle]

works as expected, thanks for the clarification.

[Christian-Me]

Good to hear that it’s working. Have to write a clarification on this topic as it is a fundamental mechanism for homie to work. One of the big strength of homie is using mqtt retained messages as build in persistence ability - but not clearly explained, especially the implementation in mqtt in relation to qos and limitations of some libraries for microcontrollers.