Is there anyone using MQTT as gateway for connecting to openHab running on another Rpi. If so please help with any links, post or any information to direct me on the right path.
Understand it might be annoying.. We run the latest version of the notif-plugin mentioned above (0.3.1). So it seems they still have some issues. They had an issue (which is closed) that sound like the things you experience.
I can't seem to find any related user setting in my account either.
https://github.com/psychobunny/nodebb-plugin-desktop-notifications/issues/19
@nrf24_is_hard When I sent data between an Aduino and the RPi I discovered that I have to make the the receiving and the sending structs the same size AND the variables be on 4 byte boundaries. Change your char name[15] to char name[16]
Another challenge is that the number of bytes of type int are different. If I remember correctly, Arduino Uno is 2 bytes and RPi is 4 bytes.
To make matters worse, some compilers make the least significant byte the first byte of a word and others make it the last byte of a word. eg, sending the value 1 would be received as 16777216 (0x00000001 vs 0x01000000)
There are a lot more gotcha's
OSD
Thanks for your fast reply.
That sounds easy.
And you think that the communication between sensor nodes and Gateway are still possible via wired RS485?
I tried to find an example on this site for sending Information from Gateway to sensor nodes. (via SendMessage ?)
For example I like to Switch on/off an light that is connected to an relay board at my sensor node.
Communcation Flow:
OpenHab2 --> MQTT --> Gateway --> RS485 --> Sensor Node --> Relay Board
Currently I have an working RS485 Connection between my Arduino Uno's with the use from SoftwareSerial library.
During my testings I realized, that the message that I triy to send "Hello" will be sent to the other arduino char by char. Is that true?
Because I tried to raise up an pin on HIGH with "if(msg == "Hello")..." But it doesn't worked.
Will the sendMsg method from the MySensor library handle this out of the box?
Regards,
Simon
Cool project @bsmtdweller
New thread or stay in this doesn't matter much, but for people searching the forum (or their favorite search engine) in the future, I think a new thread with a subject containing "incubator" will be more clear.
I would build it with multiple nodes. Smaller chunks of code, easier wiring, easier to isolate individual parts which helps tremendously when troubleshooting, easer to reuse code for one node in case you (or someone else) want to expand the project later, easier to remove a part if you (or someone else) don't need it.
The non-mysensors code is more important, so I would start with that, but make sure all parameters that you want to be able to change are stored in variables and not hardcoded. Then add the MySensors code to update the values of the variables.
The autonomy will be hard. Normally I would prefer to have all logic in the controller, since a controller has much better ways to program and debug stuff. Not fun to write - and maintain - in C with very rudamentary debugging tools. But as you say, being reliant on having Domoticz working all the time might not be good. Having the system fail gracefully will be a challenge. A start could be to search the forum for MY_TRANSPORT_WAIT_READY_MS to see what others have done. And maybe - to make the system as reliable as possible - you should add everything to a single node instead of splitting it up into multiple nodes.
