I have never used NodeRed before but I managed to have my basic flow to work.
What I have is, when device has an error it waits device to shut down, then clears error and restarts device.
What is the best (or easiest) way to make this flow to trigger just once, so that second time in row to avoid loop it is human that makes decisions - but after the human restarting device the flow should be automatic again?
Trigger state nodes have an input that can be enabled in it’s settings. This input can disable/enable the node. This is done by setting msg.payload to enable/disable.
The trigger can disable itself when it is fired. You can then turn it back on from the user input.
[{"id":"3d4cab5dbb479712","type":"trigger-state","z":"8e6ef4f6cbb13d83","name":"","server":"","version":5,"inputs":1,"outputs":2,"exposeAsEntityConfig":"","entities":{"entity":[],"substring":[],"regex":[]},"debugEnabled":false,"constraints":[{"targetType":"this_entity","targetValue":"","propertyType":"current_state","propertyValue":"new_state.state","comparatorType":"is","comparatorValueDatatype":"str","comparatorValue":""}],"customOutputs":[],"outputInitially":false,"stateType":"str","enableInput":true,"x":470,"y":2870,"wires":[["6c06fd7a7a65debc","72c723271f2a5338"],[]]},{"id":"6c06fd7a7a65debc","type":"change","z":"8e6ef4f6cbb13d83","name":"disable","rules":[{"t":"set","p":"payload","pt":"msg","to":"disable","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":670,"y":2800,"wires":[["3d4cab5dbb479712"]]},{"id":"72c723271f2a5338","type":"debug","z":"8e6ef4f6cbb13d83","name":"do something","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":790,"y":2860,"wires":[]},{"id":"e2f1ee5215e916f8","type":"inject","z":"8e6ef4f6cbb13d83","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"enable","payloadType":"str","x":260,"y":2870,"wires":[["3d4cab5dbb479712"]]},{"id":"fea08637c7257d05","type":"global-config","env":[],"modules":{"node-red-contrib-home-assistant-websocket":"0.80.3"}}]
Did I understand right that I should add trigger state?
What I have right now is - events state (error), power state (wait shutdown), action (clear), action (start).
Yes. Trigger state and event state are similar nodes. The main difference is that an event state can wait for an entity to have a certain state before firing. e.g. a switch would need to be on for 5 minutes.
Trigger state, aside from the input, can have multiple conditions. It can test other entities besides the entity it is primarily watching.