Your pi is expecting 3,3v if you don’t use a voltage divider you are going to damage it
I don’t understand. The voltage is from the pi (that gives power) to the receiver, no? I connect the VCC of the receiver to the +5V of the pi3.
Anyway if this is the case can you recommend a 3,3V TXRX?
Nowehre was written that 5V is not good … all the guides are showing tranceivers of all sorts, without any mentioning of voltage problems.
I am interested in getting the signal from PIR sensor, so a reicever is enough (as transmitter I am very satisfied with Broadlink)
The receiver is powered with 5V, as it is powered with 5v it is returning a variable 5V signal to its data pin, as the pi is designed to accept 3,3V as input you are outside the range on the gpio connected to the data pin.
After some search other people are wiring like that it may not be the issue.
Did you check this kind of tutorial.
As I’m not connecting my receiver to a Pi I can’t help you more than google.
yes I understand your point of 3,3 and 5 V. for the DATA pin. It can be that the problem.
Anyway as you can see also on the guide you provided they do not mention anything about different voltage for the data pin …
I bought a level voltage converte, will see. ALthough it gets all bulkier and bulkier. I prefer ready made objects …
Do you have an arduino to test your receiver?
Nope, I don’t
I would continue investigation on the pi before ordering another component, try maybe different schema type and software.
get a home automation designer, and let him do the job. 
off course, letting another doing the job is a bit more expensive
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no problem with that. Are you proposing?
i dont think you live in my area 
if i have to do it for you it would become very, very expensive
but i am sure that it is possible to find the right people in your area
Thanks, I will look for somebody else
I can send you a configured and working esp 433MHz bridge (wemos d1 mini), as I already use mine for some time and I’m pretty happy with it.
you have 2? Or you use now something else?
I see that D1 is a wifi board, what do you use as 433 receiver?
I have just one but could assemble a second one.
I use a 3400rf kit from greetech.
I also have an RXB6 receiver and a superheterodyne transmitter on the way.
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how are they connceted a bread board, or a closed enclosure, or?
Everything is soldered to the wemos board. And it’s in a small plastic enclosure, powered by usb. Contact me per PM if you need more information, we already polluted this topic enough ^^
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Does anyone know if there is any ‘ready to go’ / plug and play 433mhz system / dongle? All I want is a simple way to toggle an automation using an RF remote (It’s for use in a car to turn on a gate warning light - wifi / zigbee doesn’t reach).
Sonoff Rf Bridge
Take a look at this post:
Especially the transmitter/receive that @RobDYI explained.
After trying a ton of other things I found this post and it’s been working for 2 years without problems.
By ready to go, do you mean hardware and firmware?
What people do most of the time is to change the RF bridge firmware to have direct control into HASS.
The other possibility is a broadlink RM pro but I’m not aware about the HASS RF integration capabilities. Maybe someone else can answer.