davidp11
@david-patel · Mart 2025 tarihinde katıldı
Facility manager · hospitality · new to IoT
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Yapay zekâ tarafından English dilinden çevrildi ·
Belki aptalca bir soru ama kampüs aynıysa Wi-Fi bilgisini neden koda bir kez yazmıyoruz?
Possibly a dumb question but why not just put the Wi-Fi in the code once, if it’s all the same campus?
Same thing happened to me with one from a starter kit, following.
Not my field, but our building contractor had similar issues on a long cable and it turned out to be grounding. Just in case.
I did a lot of lighting retrofits at the hotels before I touched any IoT, so this one I know.
Get a constant current buck module with a dim input. The cheap ones built around a PT4115 cost a couple of dollars, come in 700 mA versions (or set by a sense resistor), take 12 to 24 V and have a DIM pin. A Mean Well LDD-700H is the nicer branded one. Feed it 12 V, LED on the output, and your ESP8266 PWM pin straight into DIM. 3.3 V PWM is enough for both of those. Around 1 kHz PWM, no flicker you can see, the driver keeps the current flat as the LED heats up.
On the Hermetry side: add a command like light.set with a number parameter to the profile’s catalog as a Basic command, then a Slider control card that runs it. The slider sends once when you let go, not while dragging. For a light I switch off Ask before running, otherwise the shift lead gets a confirm box every time. Bind the current value to what the ESP reports back (I send light.level after each change), so the slider shows what the light is really doing. Control cards walks through it.
I’m still learning this stuff, but I set up the same kind of alarm for the pool chemistry at our hotel, so I can do the second half.
There’s no “between” in alarm conditions, you write it as a group. The form does one comparison per severity, so switch the rule to JSON mode:
"severities": [
{ "severity": "MAJOR",
"condition": { "any": [
{ "key": "ph", "op": "<", "value": 5.5 },
{ "key": "ph", "op": ">", "value": 6.5 } ] } }
],
"debounce": { "mode": "duration", "raise": 300, "clear": 60 },
"hysteresis": 0.1
The duration debounce is what stops the dosing dip. The condition has to be true for 300 seconds by the device’s own timestamps before the alarm opens. Our chlorine dose dip lasts about two minutes, so 5 minutes was safe. Since you report every 30 s that’s ten readings in a row, plenty.
Hysteresis 0.1 means it clears at 5.6 or above on the low side, 6.4 or below on the high side, so it doesn’t flap at the edge.
All of this is on Alarm conditions reference, and the debounce part on the page next to it.
Yapay zekâ tarafından English dilinden çevrildi ·
Bunu SIM sağlayıcısının şifrelemesi kapsamaz mı? Mobil ağların havadan iletilen her şeyi zaten şifrelediğini sanıyordum.
Wouldn’t the SIM provider’s encryption cover that? I thought mobile networks encrypt everything over the air anyway.
Running on 2 robots since last week. The 6 dB rule was necessary, without it the zone flickered every few seconds in the lift lobby. The kitchen alarm fired once already, a cleaner took a wrong turn after a map update on the robot, and housekeeping caught it in a minute. Still would like the request though, doing it in every robot’s firmware is work.
UWB was quoted at about 10x the BLE tags for our floors, so not this year. Zone level is enough for me, I don’t need it to the metre.
Yapay zekâ tarafından English dilinden çevrildi ·
Bunu bir e-posta üzerinden duyuracak şekilde bir yol bulabilir misin? Mesela gelen kutusunu okuyacak gibi?
Could you have it announce by e-mail somehow? Like read the inbox?
Yapay zekâ tarafından English dilinden çevrildi ·
Tyler, bu tam aradığımız şey. Ona Residency sayfasını gösterdim (biz ABD’deyiz, bir ikamet şartı belirlenmemiş) ve dışa aktarma ile geçmiş API rotasını görünce çok rahatladı. Aylık CSV fikrini kalıcı bir görev olarak istiyor, yani bir sonraki projem bu galiba. Docker meselesinden bir daha bahsetmeyeceğim, haha.
Tyler this is perfect. Showed him the Residency page (we’re US, no residency requirement set) and he calmed down a lot once he saw the export plus history API route. He wants your monthly CSV idea as a standing job, so I guess that’s my next project. Not mentioning the docker thing again, lol.
Could you just give the right motor a bit more PWM until it tracks straight? Like 70 vs 74?
Yapay zekâ tarafından English dilinden çevrildi ·
Bir docker image onu çok mutlu ederdi. Bunu nerede bulabilirim? Ayarlar altına baktım ama yalnızca Residency, Data Export ve olağan diğer seçenekleri görüyorum.
A docker image would make him very happy. Where would I find that? I looked under Settings and only see Residency, Data Export and the usual stuff.
Could you put a current sensor on the fan cable and alarm when current flows while it should be off?
Not my field at all, but I’d guess redundancy? Two of everything in safety?
Yapay zekâ tarafından English dilinden çevrildi ·
İki kart arasında toprak (GND) bağlantısı yapılmış mı? Ben de o yüzden tuzağa düşmüştüm.
Are the grounds connected between the two boards? I’ve been caught by that one.

