No current on output

Robert.Wall · 2016-09-11T11:49:20.633Z

I’ve PM’d @glyn.hudson, and I think he should know, and if not he is better placed to contact @Martin_Harizanov who is the source of these units.

I think the 192 V is “pick-up” - capacitive coupling between the mains and the other wiring, but without taking the pcb out of the box and looking at it and tracing where the tracks go, I cannot be sure. I shall not tell you to do something that might be dangerous to you or that might damage the relay board. Until someone from the shop replies, the only safe way is to disconnect everything, dismantle the box and look and check with an Ohmmeter.

glyn.hudson · 2016-09-11T11:53:39.324Z

Thanks for letting me know, I think this is something for @Martin_Harizanov to look at, he knows the relay unit better than anyone (being the designer!). I will drop him and email to point him to this thread.

Paul · 2016-09-11T12:15:08.882Z

I seem to recall that he’d moved towards having voltage free contacts, instead of the original ‘live out’, so that they could replace home thermostats/controllers, but could be wrong.

Paul

Martin_Harizanov · 2016-09-11T12:47:20.977Z

Yes,
the relay outputs are just contacts in this version, this allows AC and DC switching and is in general more flexible.

Here is how to connect AC load, for example hot water boiler, basically you need to interrupt the phase line:

Screen Shot 2016-09-11 at 3.png714×890 37 KB

Of course, with a bridge wire you could use the relay to provie AC to the load like the old version, here is a wiring idea:

Screen Shot 2016-09-11 at 3.41.14 PM.png748×488 169 KB

the second approach will provide AC voltage to the load, while the first one will simply disconnect the phase as a normal switch. you chose which wiring method suits you best.

brunovg · 2016-09-11T13:27:54.938Z

Hello Martin,

Now I know how to make the connection to my boiler.
I put in here if I had success, and put a photo of my connection.

Many many many thanks.
Regards from Portugal.

Robert.Wall · 2016-09-11T14:27:25.272Z

I’ve now found some partial documentation. It is described as “mqtt-relay”, and it’s tied up with GitHub: guide/mqtt-relay.markdown at master · openenergymonitor/guide · GitHub

So the Wiki has not been updated. I’m allowed access there so I can do something about that.

brunovg · 2016-09-11T19:39:27.531Z

I already wired my boiler and it’s working
Thanks for your help

Regards.

brunovg · 2016-09-11T21:18:39.042Z

Now I have a problem with the temperature sensor

I receive a NaN value.

file.jpeg750×1334 88.3 KB

Martin_Harizanov · 2016-09-12T06:27:55.369Z

The temperature sensor isn’t providing reading; can you share your DS18B20 settings page and double-check the wiring of the sensor? Did you modify/extend the temperature sensor wire?

brunovg · 2016-09-12T06:41:34.560Z

The wiring seems to be OK, and connected.
And no, I didn’t extended the wiring.

image.png750×1334 63.4 KB

Martin_Harizanov · 2016-09-12T15:27:41.634Z

This is the thermostat settings page, can you please post your temperature sensor configuration page?

brunovg · 2016-09-12T16:34:11.756Z

Ok, let me check that when I arrive into my home.

brunovg · 2016-09-12T18:29:48.162Z

Here it is

image.png750×1334 43 KB

Martin_Harizanov · 2016-09-12T18:42:52.962Z

Settings look fine, so it is most probably the sensor playing tricks… If you pull it hard enough, the wires may get detached from the socket on the wire side…
Do you by chance have a spare DS18B20? If so, just insert it like this to test and eliminate wiring issue:

IMG_20160912_213807.jpg3286×2432 1.68 MB

brunovg · 2016-09-12T19:46:31.866Z

Now it works.

image.png750×1334 58 KB

It seems to be the wires that are connected to the plug.

Thanks for your help Martin

brunovg · 2016-09-12T20:52:10.861Z

One more question

What is the cgi URL for temperature?

The relay control is:
http://IP-ADDRESS/control/relay.cgi

Thanks again.

brunovg · 2016-09-12T20:58:57.866Z

http://IP-ADDRESS/control/thermostat.cgi?param=state

glyn.hudson · 2016-09-13T15:23:02.132Z

Great to hear you have resolved the issue. Thanks a lot @Martin_Harizanov and @Robert.Wall.

Sorry for late reply, here is the correct Wifi relay documentation guide link: WiFi MQTT Control Relay Thermostat - Guide | OpenEnergyMonitor

The github link that @Robert.Wall linked to above is the markdown source for the user guide site. It’s not required to use github to view the user guide site, just use the link above. This page is linked to from the shop product page. Please let me know if you have any recommendations to improve. The diagram we have for the relay connections is:

@Martin_Harizanov please could you confirm this diagram is correct? Do you have a preferred / improved diagram / instructions we could use>

Robert.Wall · 2016-09-13T15:32:24.064Z

It doesn’t look accurate to me. The relay pole as drawn goes to pin 3 labelled “N/C”, and the contact drawn as N/C goes to pin 1 labelled “C”. Martin’s wiring diagram doesn’t mention ‘1’, ‘2’ & ‘3’. As I wrote above, I don’t have one so I can’t check whether ‘1’, ‘2’ & ‘3’ appears on the case or on the p.c.b. If it doesn’t, then Martin’s sketch above is the only way to resolve which contact is which.

Martin_Harizanov · 2016-09-14T10:59:42.788Z

I can see how the schematic can be confusing;

Here is an attempt to explain it a bit better, top view of the relay and the connector; it exposes the Common (C), Normally Open (NO) and Normally Closed (NC) connections of the relay: