BlindController only run once each time I restarted the node red flow

[zhifanl]

Do you guys have any idea about why the blind controller only run once? My flow is supposed to run the blindcontroller every 10 seconds and it seems that it runs only once and then stop... Here is the screenshot of my flow.

[kadza]

I've just started playing with it, but it seems that it sends a message when one of the three properties changes:
if (
blinds[i].blindPosition != previousBlindPosition ||
blinds[i].sunInWindow != previousSunInWindow ||
blinds[i].blindPositionReasonCode != previousBlindPositionReasonCode
)
Probably, in your case it sends a message once when the properties "change" from the default values.

[alisdairjsmyth]

The node will only emit a message if the position of the blind needs to change, or the reason for its existing position changes. In my setup, I run the calculation every five minutes, but the position for each blind is adjusted about 10 times a day - so there are only this number of output messages per day. My suggestion would be to adjust the frequency of execution of the flow so it doesn't run as frequently, and to monitor it for a longer duration.

[zhifanl]

Thanks Sir, and I have another question: How do you keep node-red running in the background? In my case, I use node-red on home-assistant in the VM with my computer, and my node-red stops working when my computer goes to sleep, because then the network shuts down automatically, do you have any idea for solving this issue? :)

[alisdairjsmyth]

Node-Red (and Home Assistant) runs really well on low-cost hardware such as the Raspberry Pi. Raspberry Pi are a great to run 24/7. This is what I used in my setup.