Low cost window/door sensor

[SweetPants]

When you open the door (contact), which of the LED's turn on?
If both turn on, your battery is low and LP also lights up. Turns out that my battery only lasted for around 6 months. After changing for a new one all worked well again.

[jackslayter]

yes led works but no signal is received by domoticz

[Raspberry Piet]

yes led works but no signal is received by domoticz

Have you checked with RFXmngr?

[jackslayter]

no but I can add to domoticz at the beginning and after it doesn't work (1 day for example)

[ThinkPad]

Tried new batteries?

[jackslayter]

I plug with 12vdc power supply and signal isn't received by domoticz, I will try with RFXmngr.

same problem on RFXmngr , no signal

[deennoo]

I created a small and simple Arduino based device and some code to be able to link any of these cheap 433Mhz devices to the RFXCOM & Domoticz.
All information can be found here: http://www.thice.nl/convert-cheap-433mh ... convertor/
Works really well here.

Tahnk You for this !!

[ThinkPad]

So, i got a cheap 433Mhz remote with 2 buttons ('A' and 'B') from eBay.

I was able to get a cheap Intertek / Eurodomest paired to it (turned off when i pressed the 'A' button), but Domoticz doesn't seem to pick it up.
When i opened the remote, i saw a SCT2260 chip, which seems to be a clone of the PT2262 if i have to believe this page: http://kinavara.blogspot.nl/2015/02/rem ... -chip.html

I tried to solder the blobs like in this PIR of Raspberry Piet: http://i.imgur.com/tHGAykd.jpg
But doesn't work.

Anyone got a clue about how to solder the blobs? The remote is 433Mhz for sure, because it has a crystal 'BX R433A' in it, and the Intertek / Eurodomest socket responded to it (probably ARC protocol?).
I already have the PIR from this thread, so my Domoticz can receive PT2262 (Lighting4) protocol.

Edit: Hmm weird, RFXmngr doesn't pick up anything, even with 'undec on' Not with the solder blobs in default configuration, but also not in modified situation.
But the Intertek / Eurodomest plugsocket still responds to it when i solder the blobs back to default... wtf

[ThinkPad]

After mailing b_weijenberg from RFXCOM a photo of the PCB in the switch and a link to the datasheet, he told me i had to replace one (tiny SMD) resistor, marked 'R4' on the PCB.
It was marked '475' which stands for 4.7MΩ. b_weijenberg told me i had to replace it with a 3.9MΩ resistor. I first tried tying 3x 1MΩ resistors together and Domoticz picked it straight up! (Lightning4, PT2262).

But these (in comparison with the old one) huge resistors wouldn't fit the casing. I remembered that i still had a broken doorcontact lying around. I used the SMD calculator to find what 3.3MΩ must have for description. '335' it said.
So i opened the doorcontact and found a tiny 335 resistor. Desoldered and soldered it into the remote, and tadaaaaah it was working

[Raspberry Piet]

After mailing b_weijenberg from RFXCOM a photo of the PCB in the switch and a link to the datasheet, he told me i had to replace one (tiny SMD) resistor, marked 'R4' on the PCB.
It was marked '475' which stands for 4.7MΩ. b_weijenberg told me i had to replace it with a 3.9MΩ resistor. I first tried tying 3x 1MΩ resistors together and Domoticz picked it straight up! (Lightning4, PT2262).

But these (in comparison with the old one) huge resistors wouldn't fit the casing. I remembered that i still had a broken doorcontact lying around. I used the SMD calculator to find what 3.3MΩ must have for description. '335' it said.
So i opened the doorcontact and found a tiny 335 resistor. Desoldered and soldered it into the remote, and tadaaaaah it was working

Indeed value of that specific resistor needs to be 3.3MΩ
Changing the value of this resistor changes the oscillation frequency

ThinkPad, you have proven to be very handy now ( as a matter of fact you often proved that already before!)

[ThinkPad]

Haha thanks

It was not that hard, could have figured it out myself with some more time. But went for the easy way and asked b_weijenberg because he probably has seen many of these devices.
And i was lucky that i had a 3.3 resistor from the doorcontact, otherwise i would have had a problem. I don't have any SMD resistors in stock, only the plain old big ones :p

[cosmo61]

I bought this two (15,31€ Free Shipping) 433mhz standalone smoke alarm, little more expensive !
Work right out of the box with PT2262.
http://www.aliexpress.com/item/433mhz-o ... 82671.html

[roblom]

Is it possible that this cheap sensor does work with the RFXtrx433 and doesn't work with the RFXtrx433E?
I changed from the old RFXcom to the "E" version but it looks like the sensors aren't working anymore.

[ThinkPad]

No

I have the doorcontact working with RFXtrx433e.

Have you enabled the Lighting4 protocol?

[oopee]

@roblom: I have RFXtrx433 with newest FW86. If I enable Fineoffset/Viking protocol the Lightning4 devices are not received anymore. Do you use those two protocols together?
In RFXtrx user guide, there is no indication that those two protocols are conflicting. I have contacted Bert regarding this issue.

[roblom]

Have you enabled the Lighting4 protocol?

Thanks. Strange but I didn't remember that I had it enabled.

Now second thing is, can I change the "sub" channel of this sensors? I have 3 of them but domoticz sees them as one.

[ThinkPad]

Change the jumpers. See this post from Raspberry Piet: http://www.domoticz.com/forum/viewtopic ... =40#p17076
He has 4 jumpers in the upper left corner, if you change these a bit random (one position between, some of them little bit more to the right etc) the unit will transmit a different device ID.

[roblom]

Change the jumpers. See this post from Raspberry Piet: http://www.domoticz.com/forum/viewtopic ... =40#p17076
He has 4 jumpers in the upper left corner, if you change these a bit random (one position between, some of them little bit more to the right etc) the unit will transmit a different device ID.

If you know it it is quite logic
Thanks

[allasia]

I bought this two (15,31€ Free Shipping) 433mhz standalone smoke alarm, little more expensive !
Work right out of the box with PT2262.
http://www.aliexpress.com/item/433mhz-o ... 82671.html

Hello, i've received those last week as well, but somehow i don't see them in domoticz, i have undec on, and lighting 4 enabled. Did you make some special changes to the jumpers?

Nevermind, somehow this morning they showed up.

[LouiS22]

I bought this two (15,31€ Free Shipping) 433mhz standalone smoke alarm, little more expensive !
Work right out of the box with PT2262.
http://www.aliexpress.com/item/433mhz-o ... 82671.html

Hello, i've received those last week as well, but somehow i don't see them in domoticz, i have undec on, and lighting 4 enabled. Did you make some special changes to the jumpers?

Nevermind, somehow this morning they showed up.

Same problem, doesn't show up. Time to play with the jumpers i guess.

Update: Tricky one: you have to press and hold the test button to trigger it. After that, device is visible