Arduino Mega + W5500 + BME280 = Connection refused all the time

[NeoX]

@TRS-80 But it's not possible, or some bug in Mysensors.
Because in plain example the loop in sketch is empty.
Do you use lib version 2.3.3 of MySensors lib?

[TRS-80]

I just checked my local files for my gateway, and looks like MySensors is v2.3.2.

I am inclined to think the problem is somewhere else, before assuming a bug in MySensors, however it is possible (although unlikely IMO) that potentially could be the problem. One easy way to find out, anyway... ;)

[Yveaux]

@NeoX mysensors has an empty main loop() by default. The stack runs in the 'background', after each loop iteration, so your loop() should not block!

[NeoX]

@TRS-80 Do you have any idea whats more i can check? :)
Because i have no idea what could be wrong when i use plain sketch

[TRS-80]

Didn't you say plain sketch was working? Other than only being able to connect only once via telnet?

To be honest I am not familiar with using telnet for testing this sort of thing, so I installed it here on my Debian development machine to try and replicate what you are doing, but so far no luck. Probably because first time with tool and simply haven't figured it out yet. But this is what I get so far (probably doing something wrong):

┌─[ 2020-06-26 09:33 trs80@host:~ ]
└─▶ $ telnet 192.168.x.y 1883

Trying 192.168.x.y...
telnet: Unable to connect to remote host: Connection refused

┌─[ 2020-06-26 09:33 trs80@host:~ ]
└─▶ $ telnet 192.168.x.y:1883

telnet: could not resolve 192.168.x.y:1883/telnet: Name or service not known

Note I am running an MQTT gateway, therefore I set port 1883 in my sketch, furthermore I am running in MY_GATEWAY_MQTT_CLIENT mode (I think I read server mode is default in plain (non-MQTT) Ethernet sketch? not sure). So that could be part of my problem here, too.

[NeoX]

@TRS-80 The plain sketch is working in Server mode, so it is possible to connect to port 5003.
Since i don't know any tools to test MySensors ethernet, i've used telnet :)

My plain Ethernet example sketch is working, but only for one time after reset, which is weird. Just like some resources hasn't been released or W5500 didnt realised that connection was closed after ctrl+] ?
No idea...
I will take a look at MQTT, since it is working in Client mode...

[Yveaux]

@NeoX what bme library are you using?

[NeoX]

@Yveaux Adafruit BME280 in version 2.0.0, as it said in Arduino IDE

[NeoX]

Well, i tested MQTT and it worked just fine for a few minutes. Any problems.
I belive that there is some kind of bug in TCP server mode or maybe W5500 driver?
I can also say that when i close telnet connection via ctrl+] i can see that my PC is still waiting for close ack ( connection state in netstat is WAIT_FIN_2).

Don't know, but i switched to MQTT and it works fine, and i think MQTT client is more important for me.

[Yveaux]

@NeoX Maybe not relevant, but that doesn't appear to be the Adafruit BME280, as you're including <bme280_mod-1022.h>. This headerfile appears to be part of this library: https://github.com/embeddedadventures/BME280 which is very different from the Adafruit implementation.
If that library blocks too long in one of its calls it might cause troubles.

[NeoX]

@Yveaux Hmm, interesting, since only one library i do find in Arduino IDE library manager as installed was this Adafruit.
But's should be fine

[TRS-80]

@NeoX said in Arduino Mega + W5500 + BME280 = Connection refused all the time:

only one library i do find in Arduino IDE library manager

I started using PlatformIO recently, and I much prefer their way of searching libraries. When you do pio run it will even take the library.h file name that you are missing and give you a link to look it up in their library search. You can also search there for library name, or file names. Very handy!

Anyway, a bit offtopic for this thread, so recently I started another one where we can discuss PlatformIO (if you are interested).

@NeoX said in Arduino Mega + W5500 + BME280 = Connection refused all the time:

i switched to MQTT and it works fine, and i think MQTT client is more important for me

I rebuilt my gateway recently (few weeks ago) and this time I decided to go MQTT way. I actually have MQTT broker running on separate machine from my HA controller. Sort of distributed architecture, if you will. So far I am really liking this approach. Soon I will add some additional monitoring and metrics based directly off the MQTT, these will also be totally independent of the controller.