And of course you should know that the comunication is via "serial protocol", which is defined here:

https://www.mysensors.org/download/serial_api_20

@Guillermo-Schimmel said in 💬 Selecting a Controller:

@3nibble https://pypi.org/project/pymysensors/ is a nice starting point.

@3nibble https://pypi.org/project/pymysensors/ is a nice starting point.

@3nibble yes, you can talk directly to the ethernet gateway or, more easily, to the MQTT gateway. I tend to unify all my sensors, mysensors or not, over MQTT.

@Klabbe great! perhaps I'll go back to ethernet gateway. Do you think is better option over mqtt gateway?

I think so. I have a lot of battery powered nodes heavily using smartsleep and they work just fine with MQTT.

@Klabbe great to know. Thanks

Well it seems that there isn't and ther won't be a mysensors binding anymore. It was abandoned by the developer.

So as of december 2020, with OpenHAB 3, the way to go is plain MQTT.

I can't say I disagree really. MQTT is simple and works.

I'm going to start from scratch and try to document my experience here.

@rejoe2 said in sending an image without wifi / envoi d'une image hors wifi:

@Guillermo-Schimmel It indeed should not be to difficult, but still there are some questions to be addressed:

• Is there any common standard (e.g. mark start and end of transmissions with keywords like "START" or "END") in stream messages (other than OTA)?

Not that I know of. I'm afraid you are on uncharted territory now.

• How about multi stream options (different ChildIDs).

Afaik the ony sample transfer code ist this one. Using that as a base, I recently built a (not yet tested) version that most likely will be part of the FHEM integration, so I'd really appreciate some common approach to that topic to not propose a somehow "strange" implementation.

This is a nice implementation.

If it were me, I would try to seek compatibility with MQTT, I mean send the images in some form that they could be decoded by any subscriber to my broker.

But regarding header, start/stop and child id I'm afraid you are going to make your own.

Thanks a lot for this effort, I think it would be useful for a lot of us.

But no answer on that question until now.

@Oitzu Great work. Looking forward to use it. I have a use for this (some remote roof drain that gets clogged with leaves). Thanks!

Do you have the image already in some standard form? Like png or jpg? Or do you have the raw data?

In any case you can split the data, send it and reassemble. Shouldn't be difficult.

@badmannen are you sure that your arduino doesn't have a bootloader? why are you trying to modify it?

If it doesn't have a bootloader, or if you want to play with FOTA, then what you are doing it's ok, that is the way I did it.

@badmannen

1st: In order to upload soft using a cable, you don't need to modify the bootloader. Any bootloader will work.

if and only if you want to experiment with FOTA (uploading firmware via wireless), then:

2nd: if you want to use FOTA and you choose MYSBOOTLOADER, then please check the fuses and lock bits, I dont remember them all. But it seems ok, have a try and let us know!

@badmannen 76 is the default. I uploaded different versions for all the channel numbers.

Have in mind that they all have to match (gateway and all the nodes).

If they don't match they aren't going to see each other.

@waspie it's not so much pain. I have it working fine. Setup could be simpler, but it works.

The main advantage, at least for me, is unifying all over mqtt. I have mysensors, but also some server monitoring scripts, a vacuum cleaner control, etc.

It's really nice to have a single layer of abstraction between openhab and everything else.

You have to present a node and it will appear as a thing. The rest can be empty.

I'm talking about mysensors-binding over mqtt, which is what I'm using.

I think you are right. I have misinterpreted +-3 as +-3% of the value. It seems that is +-3 absolute %RH.

Thanks a lot.

Hi Guys

I just assembled two very simple nodes based on the BME280.

Same Standard sketch on both (we should add one in the main site, there is not an example), battery powered.

They both work fine, but look at this:

Pressure looks fine:

But temperature and humidity are out of declared Bosch specs:

Any recommendation? Could it be a case of fake sensors? They weren't exactly cheap.

Thanks

@mahonroy It is a very interesting experiment indeed.

I just connected the batteries to the arduino, no boosting. But I have space for 2 AAs. With coin things surely are harder.

I can't help you now but will keep watching your results. Good luck!