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--- sonoff [08.12.2018 09:54] – [retention and QoS] Pascal Suter
+++ sonoff [08.12.2018 09:57] – [Rules Engine - node-red] Pascal Suter
@@ Line 160: / Line 160: @@
 and here is what it looks like:
 {{ :node-red:flow.png |}}
+==== a word about retention ====
+it seems node-red sets the retention flag of mqtt by default. I learned this when i used it together with the mqtt-dss-connector: i created a rule that turned the light in the bathroom on. if i turned it off later (not via node-red) and then restarted the mqtt-dss-bridge the light in my bathroom went on again "for no reason" .. this was because that on command was published with the retention flag set to on (or actually not set to anything in node-red). so i set it to "false" and the problem was resolved.
 ===== Making the installation permanent =====
 this might be different in your setup, but I would like to install the npm modules globally and then run them as non-root users through a systemd script to make sure they are auto-startet as soon as my system boots.