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MX-RM-5V to RXB6
#1
Hi guys, first of all, hello to you all.

My 433Mhz journey started with nanoCUL and FHEM on raspberry pi.
I then changed from FHEM to OpenHab2.
Openhab2 had less nanoCUL functionality.
During my openhab journey, I started to use MQTT for new devices such as WiFi relays.

To bring back full 433Mhz freedom, I decided to build a gateway to convert 433 to MQTT using an ESP8266 for my:
eHome (old stuff) and Intertechno v3 (actually the dutch branded ones that I bought from Gamma.
Will add photos later.

I tried OpenMQTTGateway but had limited protocol recognition.
github.com/1technophile/OpenMQTTGateway

Finally I went with MQTT433gateway (which uses pilight) !! Smile
github.com/puuu/MQTT433gateway

This is working relatively well.
I can detect the remotes of both the eHome stuff and Intertechno stuff (even if it is not detecting as arctech_switches) similar to the info in this post on thread tid=1355

So I will debug this in the future...

I also have an Elro400 old door bell switch which this gateway is able to detect but I cannot send out the same signal to ring the bell).
So I am very happy with pilight's ability.

However the circuit I am using on a breadboard is very primitive and the detection range is 2cm! (I have no antenna).
I read online that the receiver I was using is crap. So before debugging code, I wanted to upgrade my circuit.

So original receiver was this:
MX-RM-5V:

New receiver is:
RXB6:

I cannot get ANY signal out of the RXB6....

I am not sure if I am wiring it wrong or not, can someone guide me here?
I connected the "data" to the gpio, VCC to 5V and GND to GND and a coil antenna to the ANT.

Thanks in advance guys! Smile
 
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#2
Pictures of receiver.


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#3
Can you check the functionality of the receiver with a raspberry pi and pilight first?
 
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#4
(02-01-2018, 07:50 PM)curlymo Wrote: Can you check the functionality of the receiver with a raspberry pi and pilight first?

I will give that a try but basically my ESP is utilizing pilight.
I will try to set it up on my pi this weekend.
 
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#5
(02-01-2018, 08:12 PM)NDR008 Wrote:
(02-01-2018, 07:50 PM)curlymo Wrote: Can you check the functionality of the receiver with a raspberry pi and pilight first?

I will give that a try but basically my ESP is utilizing pilight.
I will try to set it up on my pi this weekend.

I found the issue.

The MX-RM-5V is pretty bad and inefficient, so when powered by the USB 5V, it gave a signal at around 2V.

When switching to the RXB6, the data signal was at 3.8V.
The ESP8266 is 3.3V only.

So, I powered the RXB6 with the 3.3V VCC line and it works.
Of course, it is not the right way to do it.

Next I will make a logic converter to power the RXB6 with the 5V while using the data in a 3.3V compliant manner.

Hope this helps someone in the future.
 
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