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How to keep data across HA restart
(lemmy.world)
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this post was submitted on 14 Nov 2023
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How network-savy are you? I'm thinking you could run tcpdump on your HA server and capture network packets while restarting HA, then inspect in Wireshark.
Most devices don't actually "send" their status to HA directly. It'll (usually) be HA querying their status (the exception being devices that publish via intermediate services, like MQTT). Inspecting the network packets might reveal more about what's going on.
All the devices (sensors and switches )sends their status via MQTT; I've manually configured them all via yaml. The problem is in HA itself since as soon as I reload the config, the thermostat (which is a HA entity by itself), loses the setpoint and the status (heater/cool/off).
@peregus @DeltaTangoLima I am not an expert by any means, but I think there is a state "recall" somewhere that tells mqtt and or ha to keep last state
For MQTT that's the retain flag, but for HA I don't know what that is and I really need it!!!
The retained flag simply tells the MQTT broker to keep the last message published for that topic, so it's always available (rather than timing out and emptying the topic).
Like I said, you should probably do a packet capture to see what's happening when HA queries states (either from devices or MQTT - it doesn't matter).
HA doesn't query any state. The thermostat is within HA, it doesn't have to query anything from anything, that's what I'm investigating. The setpoint is set in HA and HA retains that number.
That doesn't make sense. HA doesn't "own" the setpoint - the physical thermostat does. All HA is doing is telling the thermostat what setpoint to use, as if you were standing in front of the thermostat yourself.
What thermostat are you using?
The thermostat is an entity in HA, there is no phisical thermostat! It's a generic thermostat!
Ah, so your real issue is just the thermostat? Your OP made it sound like you were asking about all switches and sensors.
Is it just the setpoint that you're losing and not getting back after restart? I'm assuming it's getting the current temp back from the sensor just fine?
No, my problem is not just the thermostat! All the sensors and switches loses their state, but while they get them back in a while kapart from the battery powered sensors), the thermostat has to be set back manually.
Jesus, you're not exactly making it easy here mate. Feeding info piecemeal, to someone who's spending time to try and help you, only frustrates both of us.
Re the sensors and switches, you said they're all sending states via MQTT. Are they setting the retained flag? If not, that's the problem. If so, run a packet capture to see what's happening when HA restarts - maybe it's not querying MQTT successfully straight away or something.
Re your thermostat, can you post your config? There's a few threads on the HA community forums that are complaining of similar issues, with various causes/solutions discussed.
I'm sorry if you think that I'm wasting your time. From my point of view, it's the other way around since all it's written in the OP! And you still saying to run a packet capture means you didn't get the point or you know HA less than me!
Your OP says "everytime I restart to apply the changes, all the switches, sensors and even the thermostat lose their values". Later on, you've said that you configured all your switches and sensors to publish their states in MQTT. Hence why I'm saying you need to look at how and when HA is querying those states.
You've since clarified that the thermostat is a generic thermostat entity, where HA controls setpoint. Without having posted your config, I'm left to assume that HA turns your HVAC on/off based on a temp sensor state.
I've been running HA for many, many years, and am a network guy by trade. I'm only trying to help, but you're now assuming I'm either not getting the point or know less than you.
No worries, mate. Best of luck. 👍