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Automatic cabin ventilation

kandid said:
My application operates via a proxy server that constantly monitors the vehicle's state by sending requests through the Lucid Server. One of the issues is that the sensor temperatures stop updating when the car is asleep. To address this, I wake up the car once an hour to check the temperature, and if it exceeds a certain threshold, I trigger the ventilation. The wake-up frequency can be adjusted based on the time of day and ambient temperature—for instance, there is no need to wake the car between sunset and dawn. If you want to avoid waking the car altogether, you could build something using a separate microcontroller that monitors the temperature more frequently and sends this data via its own modem to the proxy server, which then decides whether the car needs to be cooled down.
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Aka-none said:
Or something really simple, imho, a setting to slightly crack the windows. Easier than a fan and only a one time power usage.
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This already exists in Gravity and Air. It just isn’t exposed via the app for Air, for some reason.

But you can do it with Home Assistant iirc. :)

(Edit: I see people are already discussing it; my bad, carry on)
 
borski said:
This already exists in Gravity and Air. It just isn’t exposed via the app for Air, for some reason.

But you can do it with Home Assistant iirc. :)

(Edit: I see people are already discussing it; my bad, carry on)
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Yeah I keep thinking I should just put HA in the car
A pi with a smallish screen?
 
kandid said:
I thought it cracks the windows, but it doesn't switch the circulation fan on, am I wrong?
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Yes correct. I was just saying I would like the setting to also use the fans to just circulate without AC. Althought it's 96 DEG F today and I left my car outside in the sun for 45 mins and the inside only got to 85, so not too bad. I have been holding out on the canopy shades until this week's temperatures properly test the car without them....
 
illopp00 said:
Yes correct. I was just saying I would like the setting to also use the fans to just circulate without AC. Althought it's 96 DEG F today and I left my car outside in the sun for 45 mins and the inside only got to 85, so not too bad. I have been holding out on the canopy shades until this week's temperatures properly test the car without them....
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We put the roof shades and windshield shade in the car prior to Phoenix earlier
So very glad we did, a measurable difference
Not like cold but definitely cooler
 
Aka-none said:
Ever been in a place where there is no radio signal of any sort?
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That is the main challenge, as any communication relies on the Lucid server and an active internet connection. If you are in a dead zone, the only potential workaround would be connecting the car to a Starlink Wi-Fi hotspot to maintain that link.
 
Let's take this to the next level of complexity. You could set up an MCU equipped with both Wi-Fi and an LTE modem to monitor the cabin temperature every 10 minutes. If the temperature hits a certain threshold, the MCU would first attempt to reach the Lucid server via LTE. If that connection fails, it could trigger a power relay to boot up a Starlink terminal. Once the Starlink Wi-Fi connection is established - and assuming the car is configured to join that network—the MCU could then proceed to command the vehicle to activate the climate control.

 
Aka-none said:
Ever been in a place where there is no radio signal of any sort?
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Sure, I’ve been in a few faraday cages. Not sure how that’s relevant.
 
I like the sunset to dawn sleep logic. No point cooling a car at night when it's already cool. Saves unnecessary wake cycles.
 
Aka-none said:
Ever been in a place where there is no radio signal of any sort?
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HA doesn't communicate directly with the car (neither does the Lucid app, except for mobile key). They talk to a cloud service which talks to the car. So unless I'm missing something, having HA in the car doesn't really help you if the car doesn't have cell service either.
 
kandid said:
I think VLA will be one of the few exceptions because, if I'm not mistaken, even Starlink blocks terminals in that area.
Well, there's still the option to find an active Ethernet port there and run a cable to the car :D
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Sometimes I pretend to know something about astronomy and thus naturally seek out dark empty skies. These places tend to create dead zones
Edge case obviously, me and maybe one other somewhere
 
Aka-none said:
Sometimes I pretend to know something about astronomy and thus naturally seek out dark empty skies. These places tend to create dead zones
Edge case obviously, me and maybe one other somewhere
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But when you find each other the meet cute will be unbearable
 
Ok back on topic
You realize that if you set the ac set point to something higher than ambient then it won’t turn on the compressor (or it shouldn’t, but I’ve not tried it and I’m outside having a beer) anyway if the thermostat is set higher then it won’t turn on. similarly if you set the heat to less than ambient it won’t turn on.
 
Aka-none said:
Ok back on topic
You realize that if you set the ac set point to something higher than ambient then it won’t turn on the compressor (or it shouldn’t, but I’ve not tried it and I’m outside having a beer) anyway if the thermostat is set higher then it won’t turn on. similarly if you set the heat to less than ambient it won’t turn on.
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To be honest, this was my first bet, and I was just trying to use the temperature to balance between turning on the heat and the AC. As it turns out, it's not that simple because the logic prefers to either just heat or just cool. The biggest challenge starts when it's over a hundred degrees inside, since the thermostat doesn't know how to handle temperatures from the surface of Venus and, if I'm not mistaken, doesn't accept values below 60 or above 85.

Honestly, it would be awesome if I could just control the heating/cooling and the fan separately, just like on a home thermostat.
 
illopp00 said:
There is a vent mode in the app that cracks open all the windows, i think it should be paired with AC off fan circulation.
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I think that might be a gravity thing rather than an air
 
borski said:
This already exists in Gravity and Air. It just isn’t exposed via the app for Air, for some reason.

But you can do it with Home Assistant iirc. :)

(Edit: I see people are already discussing it; my bad, carry on)
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I’ve picked up a pi5 just for the purpose of trying that out.
 
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