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 Smart Home, Let's discuss

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Zot
post May 8 2019, 07:43 AM

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QUOTE(katrina8080 @ May 8 2019, 01:09 AM)
Hi, do you mean Sonoff RF need the neutral wire when it's install to my LED light?
Do you think it can connect to my LED ceiling light as below?
Thanks.

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At ceiling location, the N wire is there. So no problem. The problem is if you want to install sonoff gadget at wall switch location.
Zot
post May 8 2019, 11:23 AM

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QUOTE(katrina8080 @ May 8 2019, 11:14 AM)
Thanks for the explanation. I don't need sonoff gadget at wall switch location  smile.gif
I am newbie on this wiring stuff and I heard they said Malaysian power plug lack of 1 type of wire causing the Xiaomi Aqara smart switch (the cheaper one that require neutral) can't be used.
That's why I worry our ceiling light point also the same. haha. doh.gif
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Just for clarification:

The wall switches in Malaysia do not have N wire. We follow British standard. So, it is not only in Malaysia
The power plugs on the other hand (wall sockets) have the N wire.

Power plugs and switches are not the same smile.gif
Zot
post May 8 2019, 02:09 PM

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QUOTE(katrina8080 @ May 8 2019, 02:00 PM)
Thanks!
Summarize what I learn so far: **Updated
Power Plug (wall socket): comes with Live, Neutral and Ground wire
Wall Switch: 99% don't have Neutral wire, comes with Live wire
Ceiling Light/Fan Point: come with Live and Neutral wire. (This is the one that I plan to install my Sonoff RF there)
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laugh.gif Forget 1 more:

The wall switch for water heater or those with light indicator (normally) has both L and N (even E). The switch is DPST (Double Pole Single Throw) which means when switched off, the L and N wires are isolated from any house wiring.

This post has been edited by Zot: May 8 2019, 02:09 PM
Zot
post May 8 2019, 03:28 PM

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QUOTE(teddysgame @ May 8 2019, 02:48 PM)
Hi guys, i have an idea for a smart home automation concept and i would like to ask you about it.

I always fancied the game Portal 2 because mainly of the character 'Wheatley'.

user posted image

It is a hanging talking robot that runs on a rail mounted on the ceiling.

The idea is to replicate a smart home automation system but with 'Wheatley'. (instead of a table top round bluetooth speaker like Alexa)

It will be intergrated with:
- Mobility capability to travel on the rail to you when you call it.
- Speech recognition to give it more natural command conversation.
- Facial recognition to recognize the occupants, master, and spot strangers and intruders. It will also look at you in your direction if you engage with it.
- Ability to control all your home devices.
- Send notifications to your phone
- Take out the trash (LOL)

So far, i think i am capable of building this first. However, just wanna get some feedback on what you guys think?

Is it a project you all will be interested in?
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Sounds like simple one stop solution

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Zot
post May 22 2019, 08:08 AM

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QUOTE(areankim @ May 22 2019, 01:53 AM)
Hi, aqara switches, with neutral and without neutral. What is the advantage of the 1 with neutral line over the 1 without?
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The most obvious difference is that the one that require no N will have load range from min to max of 3W to 800W respectively. The one with N has no such restriction and act like normal switch for load.

The advantage for the one without N obviously that you need not to hack your wall to pull the N wire to switch location. biggrin.gif

Unless you need 100W lamp then I would not bother with one that require N. smile.gif
Zot
post May 22 2019, 10:14 AM

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QUOTE(alucard89 @ May 22 2019, 09:39 AM)
Speaking of switches that requires neutral or not.
Anyone with sonoff wall switches getting light flickers or just the intermittent on/off lights after using it for some time (2-3 months)?  Like for mine, I just looped in N from nearby wall outlet.
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Is that with the by-pass capacitor and still flicker?
Zot
post May 25 2019, 12:16 PM

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QUOTE(areankim @ May 24 2019, 11:04 PM)
this is what i have read and wanted to confirm, meaning to say without N it will flicker at low wattage.
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That's why switches come with either bypass capacitor or resistor to be installed at the light point.
Zot
post May 26 2019, 12:41 PM

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QUOTE(de_ghost @ May 26 2019, 12:29 PM)
so i can basically do like this right?

user posted image

if i do like this, up to how many Sonoff switch i tab to the 1 common N line
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Just like Fubar20 mentioned, from any N line nearby. Yes you can tap from AC line.

How many?

The total load to that wire (i,e, AC + light + etc) equal to or less than MCB rating.
Zot
post Jun 18 2019, 02:54 PM

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QUOTE(akarsan @ Jun 18 2019, 01:34 PM)
Quick one sifu sifu sekalian.

Sonoff powr2. Just to confirm that it's completely safe using it on a 2hp aircond, running for long hours? (8 hours to 12 hours)

And secondly, let's say if I have an IR blaster. Eg. Rm3 mini, which I would like to use to  control aircond. But if I have 2 of the same brand aircond (but different hp) at the location, would out be able to differentiate both the aircond? Or both the aircond will pickup the signal sent from the ir blaster? Assuming that both is on standby power

Lastly, sonoff website says powr2 is 16a. But look at the pictures online and also from some online shops it's 15a.

Anyone who has it can confirm?
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I can probably answer on 1st part

2HP is just about 1.5kW or 1.875 kVA assuming 0.8 motor PF (power factor). So, normal running current is a bit less than 8A. SO, no problem for long run. However, it is the surge starting current (inrush current) that may have concern. This depends on the inverter circuitry. A good one will limit surge current to no more than normal operating current which pose no problem.

To get the actual inrush current, you need to find the NEMA motor rating, but in general the current would be around 10~12A. So, I think it is still safe.
Zot
post Jun 21 2019, 12:28 PM

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QUOTE(littleway @ Jun 21 2019, 11:59 AM)
Guys

Anyone tried using the Aqara Single Gang with Neutral line for their Heater or Aircond?
While I could not find the tolerance level for the amperage, it does mentioned that it would be able to support up to 2500watt.

Looking at Daikin 2.5hp inverter FTKG60QV1W model, the spec sheets stating that it's maximum amp is at 8.2amp, and 2000watt.
However not sure if the switch can handle this kind of load at long hours.

Anyone?
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If you worry, just use the switch to activate a contactor switch
Zot
post Jul 1 2019, 09:04 AM

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QUOTE(lucaswjk @ Jun 30 2019, 02:07 PM)
why u wan smart curtains when there are smartglass...


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This is just using LCD type glass but would cost a bomb compare to curtain. smile.gif
Zot
post Jul 3 2019, 05:12 PM

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QUOTE(eikhwan4 @ Jul 3 2019, 03:14 PM)
hi all, i will be shifting to my new house next month. thinking to automate all those lamps, ac, fan to be a smart home.

which one do i need to do first. keen to use xiomi product.

all i has in head is using
Yeelight LED Ceiling Light
Yeelight Crystal Ceiling Light Pro

please advice. thanks
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I think avoid automate everything. Brain need exercise to prevent Alzheimer biggrin.gif
Zot
post Jul 5 2019, 10:39 AM

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QUOTE(y4ng @ Jul 5 2019, 10:33 AM)
physical switches yes (wired, neutral or non-neutral version), works like a normal push button switch. wireless switches, no. sensors all those no.
i installed mine when there's no internet for all, used one phone as a wifi provider, and another to control to test.

My mistake is i didnt provide any power point for my cameras, so gotta pull another set to where i want my cameras to be.
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That is why no difference between wired or wireless when using non-battery powered device. Either you prefer to pull electrical wire or LAN wire, speaker cable or power cable laugh.gif
Zot
post Jul 5 2019, 11:12 AM

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QUOTE(Fubar20 @ Jul 5 2019, 11:01 AM)
Prefer wired than wireless. Some area wifi are not strong and a bit dodgy.
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Me too. I prefer pulling low voltage wire smile.gif

Wireless signal when weak, throughput also fold back to low speed. However, not a problem to sensor, smart switch, etc. except video
Zot
post Jul 5 2019, 11:25 AM

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QUOTE(Fubar20 @ Jul 5 2019, 11:15 AM)
What do you mean by that? Care to elaborate.
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No lah. I mean I prefer to pull CAT cable and use PoE instead of using wireless camera and pull AC power cable near the camera biggrin.gif

Not only wire easier to handle, the transmission speed also way better than wireless for for heavy data like video.
Zot
post Jul 5 2019, 11:50 AM

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QUOTE(Fubar20 @ Jul 5 2019, 11:46 AM)
Ah, ok. Understood. Not familiar with POE.
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It is just Power-Over-Ethernet. The LAN cable can also carry power to supply your CCTV other than just data. This is not something new.
Zot
post Jul 5 2019, 12:18 PM

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QUOTE(y4ng @ Jul 5 2019, 11:55 AM)
hmm, what brands of CCTV with POE is considered reliable, and can get in msia?
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Any brand you think good is fine. The PoE is not something complicated. the LAN cable has 4 pair of wire. 2 pairs are used for data and the other 2 pairs are used to carry power. So, the power injector (or can say power adapter) is somewhere else at power socket.

Some will multiplex the data and power together, thus using only 2 pair of wire to carry both data and power on same wire pairs. I think this is pretty common now since PoE standard has been around for almost 20 years perhaps. You can google. I give example here. You can see also how PoE injector cable looks like and how power and LAN combined.

https://www.lelong.com.my/kx/poe+ip+camera.htm
Zot
post Jul 5 2019, 12:26 PM

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QUOTE(y4ng @ Jul 5 2019, 12:22 PM)
ya thanks! cos from what you said, easier to pull LAN cable compared to electrical cable. but gotta hide my router, later thief pull that out gone liao everything  cry.gif
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All the LAN cable go into safety box, I mean safe. That is where you put your recorder laugh.gif

This post has been edited by Zot: Jul 5 2019, 12:27 PM
Zot
post Jul 5 2019, 02:50 PM

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QUOTE(adamw @ Jul 5 2019, 12:54 PM)
Real POE only used 2 pairs for both data+power, only POE+ uses all 4 pairs.
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They are all standard which I just called PoE. Using same pair carry less power than using separate pair. Using all 4 pairs for power can carry even more power. Cisco created non-standard one that can carry even more power.
Zot
post Jul 10 2019, 08:36 AM

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QUOTE(akarsan @ Jul 9 2019, 06:08 PM)
Quick question. Sonoff sifu..

Sonoff basic cuts off live line or neutral line or both?

Wiring for t5 lighting. As my wireman edi pulled the cables. I just got my sonoff and ask if he could connect it. So need to know which line it cuts, because he already has the normal loop

Sorry.. After looking at schematics.. Based on my non electrical knowledge.. When it's off. It routes the live to neutral. Correct me if I'm wrong.
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I'm no Sonoff expert sine I have yet to install one biggrin.gif

As far as I know looking at sonoff schematic diagram, the switch side of sonoff is just a single contact relay, similar to a single pole wall switch. Normally you want to break the L wire connection to the load (lamp in this case).

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