Guide: Setting up and testing MQTT Client Gateway

Samuel235 · *mygateway1-in/2/1/1/0/49*

@hek said:

You can run the MQTT gateway on an Arduino+W5100 ethernet module or the ESP8266. Connect radio and ethernet module exactly like for the normal gateway.

Have we managed to get a MQTT Gateway working on a Arduino with an ENC28J60 module rather than a w5100?

hek

@samuel235

I didn't bother trying. The ENC-library is gigantic and the MQTT implementation used does not support the ENC-module.

ahmedadelhosni

@samuel235 I don't really encourage you to use ENC. I spent months trying to make it stable and I failed. There are several manufactures and as far as I know that there are several software workarounds to fix problem in the silicon chips. I turned to use W5100 and it is much better till now.
N.B.: Some people managed to run ENC with good stability but as I have said, there may be different manufacturers so I got confused and tried the W5100.

Samuel235

@ahmedadelhosni I have now turned to the W5100 shield myself. Works a charm, super smooth!

vickey

I tried to make MQTT client gateway but it is giving following error while compiling

C:\Users\Ahmed\AppData\Local\Temp\build8359488613260197686.tmp/arduino.ar(core_esp8266_postmortem.c.o): In function `abort':
C:\Users\Ahmed\AppData\Roaming\Arduino15\packages\esp8266\hardware\esp8266\2.0.0-rc2\cores\esp8266/core_esp8266_postmortem.c:177: multiple definition of `abort'
GatewayESP8266MQTTClient.cpp.o:C:\Users\Ahmed\Documents\Arduino\libraries\MySensors/core/MyMainESP8266.cpp:46: first defined here
collect2.exe: error: ld returned 1 exit status
Error compiling.

Any suggestions @hek ?

hek

@vickey
Sorry haven't seen this error. Which ESP board version do you have installed in the IDE? (See Board manager).

Please do no double post on the forum! Only creates annoyance.

vickey

@hek I am using Stable ESP8266 version 2.0.0 from stable release

ciprian

If it helps:
in ESP8266 ver. 2.0.0 was added abort in
here
cores/esp8266/core_esp8266_postmortem.c:

void abort() __attribute__((noreturn));

void abort(){
    // cause exception
    s_abort_called = true;
    do {
        *((int*)0) = 0;
    } while(true);
}

i comment the lines in MySensors/core/MyMainESP8266.cpp and it compiled ok.

hek

@ciprian
This has been fixed since a while back.

dakky

Hello.

I tried the development branch because I prefer having my gateway not as message broker.
I had some problems resulting in conflicting entries for the gateway in MyConfig.h and the sketch. MyConfig.h always wins :D for the release it might be more transparent for the user if there is only one location, where the gateway settings are defined: example or MyConfig.h

So much for the feedback, now to the problems:
I use the w5100 version of the sketch with a static IP.

In the serial monitor i see:

0;0;3;0;9;Starting gateway (RNNGA-, 1.6.0-beta)
0;0;3;0;9;Radio init successful.
IP: 0.40.68.10
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Init complete, id=0, parent=0, distance=0
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...

in the log of the moquitto server i see:

1450112394: New connection from 192.168.100.10 on port 1883.
1450112394: New connection from 192.168.100.10 on port 1883.
1450112394: Socket error on client <unknown>, disconnecting.
1450112409: New connection from 192.168.100.10 on port 1883.
1450112409: New connection from 192.168.100.10 on port 1883.

The gateway tries to open a lot of connections and all of them seem to die after a short while
Any idea?

Mike Cayouette

@dakky The gateway tries to open a lot of connections and all of them seem to die after a short while

I had a similar problem a while back, not with the mysensors dev branch, but while using the subpub MQTT library on a ESP8266. After upgrading my MQTT (mosquitto) server to version 1.3.5 it corrected to the problem. You may want to take a look at the version you are running.

Mike

dakky

Thx 4 replying ;)

mosquitto version 1.4.5 (build date Sun, 08 Nov 2015 21:43:12 +0000)

unfortunetly this seems not to be the problem :(

EDIT: i updated the PubSubClient lib to version 2.4 instead of the delivered 1.9. Same behavior
Another EDIT: mosquitto itself seems to work fine: OpenHab successfully connects to the broker and delivers its messages

drock1985

Hi,

I'm trying to set up the MQTT gateway to work with Home-Assistant; since the serial gateway plugin lacks in binary switches (ex relays, and other things).

I have the MQTT sketch installed on a Nano with W5100 module, and serial output from the Arduino is good. But when I add a sensor to the Gateway, there is no communication.

Here is my output from Arduino, where would I go next?

0;0;3;0;9;Starting gateway (RNNGA-, 1.6.0-beta)
0;0;3;0;9;Radio init successful.
IP: 192.168.86.112
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;MQTT connected
0;0;3;0;9;Init complete, id=0, parent=0, distance=0
ad: 0-0-0 s=0,c=0,t=0,pt=0,l=0,sg=0:
0;0;3;0;9;ver mismatch
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;MQTT connected```

dakky

@dakky said:

The gateway tries to open a lot of connections and all of them seem to die after a short while
Any idea?

Narghs!

Seems to be a hardware problem. I changed the w5100 module with an w5100 arduino shield and now it works fine:

0;0;3;0;9;Starting gateway (RNNGA-, 1.6.0-beta)
0;0;3;0;9;Radio init successful.
IP: 192.168.100.10
0;0;3;0;9;Attempting MQTT connection...
0;0;3;0;9;MQTT connected
0;0;3;0;9;Init complete, id=0, parent=0, distance=0

I'm still interested in the reason. Hardware broken or wiring fail?

pinging the arduino worked
i can see the connections on the broker

=> basic networking seems to work, but "delivering content" failed. Any guesses?

Strange fact: with the "broken" hardware:

0;0;3;0;9;Radio init successful.
IP: 0.40.68.10

with the shield:

0;0;3;0;9;Radio init successful.
IP: 192.168.100.10

Same sketch, 192.168.100.10 is the correct Ip (obviously) ;)

Greeting
Dakky

ahmedadelhosni

@dakky I guess I had that problem once or twice before but I don't pay attention to it as there was other bugs which were more important.

I remember that I just reset the nano and it worked at once. Glad that it worked for you but as you have said, knowing the root cause it important.

Will try to reproduce it again when I have time.

dakky

Another question:

I don't have any experience with the classic setup (broker on gateway). But does

The topic resembles the serial protocol. You must define you preferred subscribe and publish prefix in the sketch. The topic is build like this:
MY_MQTT_PUBLISH_TOPIC_PREFIX/FROM-NODE-ID/SENSOR-ID/CMD-TYPE/ACK-FLAG/SUB-TYPE

mean, that the consuming controllers configuration (openhab in my case) has to be changed?
From

sensor-gw1-out/99/3/V_TRIPPED

To

sensor-gw1-out/99/3/1/0/16

in order to represent what is really pushed to the mqtt broker? Because thats what is posted to the broker?

moskovskiy82

A little bit cofused. Can this sketch be uploaded to ESP12 set as in the "ESP8266 WiFi Gateway"? Without the arduino?
After uploading it to esp all i get

load 0x4010f000, len 1264, room 16 
tail 0
chksum 0x42
csum 0x42
~ld

moskovskiy82

Can more detailed instructions be given on the development branch? As i understand this is not a simple copy the code from here https://github.com/mysensors/Arduino/blob/development/libraries/MySensors/examples/GatewayESP8266MQTTClient/GatewayESP8266MQTTClient.ino paste into arduino IDE compile and upload process?

hek

@moskovskiy82

Yes, after the MySensors library has been installed you should be able to compile/upload the sketch and run it.

moskovskiy82

Well i had to move all the libs from production branch and extract clean only the development branch in arduino IDE to get it to work.
Afterwards had to do the same thing back to production to compile the humidity sensor as it gave me the following error during compilation

Arduino: 1.6.5 (Windows 7), Board: "Arduino Pro or Pro Mini, ATmega328 (5V, 16 MHz)"

In file included from Mysensors_DHT_Wireless.ino:31:0:
\My Documents\Arduino\libraries\MySensors/MySensor.h:201:3: error: #error No forward link or gateway feature activated. This means nowhere to send messages! Pretty pointless.
  #error No forward link or gateway feature activated. This means nowhere to send messages! Pretty pointless.
   ^
Mysensors_DHT_Wireless:39: error: 'MySensor' does not name a type
Mysensors_DHT_Wireless.ino: In function 'void setup()':
Mysensors_DHT_Wireless:50: error: 'gw' was not declared in this scope
Mysensors_DHT_Wireless.ino: In function 'void loop()':
Mysensors_DHT_Wireless:75: error: 'gw' was not declared in this scope
Mysensors_DHT_Wireless:85: error: 'gw' was not declared in this scope
Mysensors_DHT_Wireless:90: error: 'gw' was not declared in this scope
'MySensor' does not name a type

Guide: Setting up and testing MQTT Client Gateway

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