MQTT Broker gateway

[A Former User]

Hi All

Just a simple question:

Are there any limitation in how many MQTT connections/sessions the MQTT Gateway can handle?

If so, can this be changed?

[Gambituk]

Hello. I am new to Mysensors, openhab and mosquitto.. I have a working knowledge of arduino and nrf24l01, and currently am running a wireless(nrf) twitter controlled heating scheduler, and am sending multiple temp (ds18b20) sensors to Xively feed.

I am really hooked on the idea of mqtt and openhab, and i thought that mysensors seemed like a good solution for implementing that idea.

My progress so far is to install the DallasTemperatureSensor by MySensors node to one nano, and the ethernet gateway sketc as a first step, and now i have installed the mqttgateway again from the build page, and i have a working install of mosquitto and openhab on a rasp pi b+.

I am just having difficulty getting it all stuck together. I have created the sitemap items and transform files as above and can access the openhab sitemap for the above configuration. i just don't know if i need to configure other items? how can i test each step? and can i use mosquitto with the setup that i have outlined. There seems to be conflicting info about what can and cannot be done with mosquitto and mysensors.

1 do i need to modify the sketch of the temp node? i have some output from the serial that suggests that it is communicating with the gateway.
2 do i need to modify the gateway with info of the mosquitto server?
3 what can i do to test each step of the transit from temp sensor to openhab?

Thanks for any and all responses.

[xefil]

Hello!

I've downloaded the 1.4.1 version of the library and tested it via OpenHab.
I'm still not getting the sketch_name correctly via MQTT and Openhab. Is it still an open bug?

Thanks!

Simon

[igorvin2]

Hi Simon,
I had the same problem
I tried several time clean Eeprom and flash sketch again but with no results
Only after cleaning of Eeprom with the following scratch my sensor is starting work correctly
I recommend to try it:
Clearing EEPROM

Igor

[alexeinz]

@mwhansen Hi, I am also struggling with this, seems it can only handle one connection now which makes it extremely hard to debug or check node ids

[marceloaqno]

@Gambituk To connect to a external MQTT server (mosquitto) use this MQTT gateway version:
http://forum.mysensors.org/topic/524/mqtt-client-gateway/

[Gambituk]

Thanks @celonunes I eventually found that version of gateway via somebody else. i have another post with some issues i found with that version. http://forum.mysensors.org/topic/921/strange-value-being-sent-from-controller-using-mixed-temp-relay-node it's not really resolved, but i have some kind of workaround.

[marceloaqno]

@mwhansen @alexeinz The MQTT gateway can handle up to four simultaneous socket connections, this is the limit of Arduino ethernet shield (Wiznet W5100).

The problem is that openhab don't get along with the way the gateway handles multiple client packages. I will send a fix for this problem in the next few days.

[alexeinz]

@celonunes actually, i figured a way around it using mosquitto bridge
that way its much more robust too, so I am good :-)
can post my conf if anyone interested.

[marceloaqno]

Those are the most recent changes to MQTT gateway:

• Fixed node id distribution by the gateway (reported by @viking)
• Fixed the problem with openhab and multiple MQTT clients
• Fixed the appearance of garbage in messages sent from MQTT to a node

[C.r.a.z.y.]

I can't change on-off manually for button with relay sketch, if i try, connection is lost, switching from screen never works again until restart everything.

2015-03-05 15:51:29.200 [INFO ] [runtime.busevents ] - node2_sw2 received command OFF
2015-03-05 15:51:32.624 [INFO ] [runtime.busevents ] - node2_sw2 received command ON

Openhab 1.6.2 or 1.7.0 same result.

**My main problem is losing connections with nodes. I also tried serial binding and same result.
**
Mysensors+Openhab useless with mqtt and also serial binding

[marceloaqno]

@C.r.a.z.y. Could you send the serial output from the gateway? And a more complete log from openhab showing errors?

[hek]

@C.r.a.z.y. said:

I can't change on-off manually for button with relay sketch, if i try, connection is lost, switching from screen never works again until restart everything.

Are you sure it isn't a powering issue of the "button-node" where radio shuts down when you press the button? Are you controlling a physical relay?

[C.r.a.z.y.]

@celonunes You can find MQTT and serial logs in the zip files openhab 1.6.2 and 1.7.0 logs-1.7.0.zip logs-1.6.2.zip

@hek My nodes are working perfect when i only plug serial usb to any usb socket of a computer-printer-usb hub even a mobile phone charger :) they are good without server/controller

[C.r.a.z.y.]

@hek My relay powered from nano icp headers maybe this makes trouble for wifi , i will change this and give update.

My button is not normal button , its an ir distance sensor which trigers the relay.

[hooraysimpsons]

I can't seem to get openhab to communicate with my MQTT gateway. I can connect to the gateway with the MyMQTT Android app and I receive messages from my light sensor node including the sketch name and light level. I can ping my gateway without issue as well.

However, OpenHab never seems like it notices the gateway. No data in the sketch name or node result. I've used the sitemap, items, and config files as described above and I've also customized them to match my sensor node more specifically. Both without success. The only change I've made is my sensor node is defined as node ID 20 within it's sketch.

When using start_Debug.bat what should I see in the command line window to indicate OpenHab even sees or connects to the gateway. I see no indication that it attempts to connect to the IP address of my gateway.

Thanks

[Gambituk]

Maybe if you can share your items, sitemap, and rules if any.

[hooraysimpsons]

@Gambituk
openhab.cfg
test.items
1present0absent.map
test.sitemap

[Gambituk]

can you also please paste a sample of what you see in myMQTT or screenshot maybe? or it can be easier to copy and paste from a terminal window? are you using raspberry pi or something else?

[C.r.a.z.y.]

@hooraysimpsons unplug the power and restart your modem, check your dhcp menu if it has ip for Ardiuno.

Check your mqtt from serial monitor, you must see "gateway started..."