this is a good place to start and start to understand.
I'm not a lot of diggers, however I start reading something, and in case I'll ask for help
In a lot of thanks

@kimot I did not understand what you tell me, can you explain better or with some examples ??

Hello
So if I understand, a node from domoticz can only ask the status of a sensor connected already him, and not the status of other nodes of the network!
So it is impossible for me to create nodes / displays to display the status of other sensors in the network.
The only way is to use some old mobile phone as a display point

do you mean that it is not possible to request those data from the node that will make the display ??

@pjr
yes, I intend to receive data from devices that do not belong to that node, but to other nodes.
So random devices of the network

Hello!!
I would like to make some small displays to put in the house where you can see the status of some lights and temperatures.
So it was my intention to retrieve this info from Domoticz from time to time. If I understand correctly I should use the "request" command only that I have no idea where to start ....
Has anyone already done something like this and wants to share their experience and / or a piece of code already done ??

you could also provide the links on eBay of the pieces

@fac13 I looked a little bit the problem is not MYSbootloader, because if I have seen well, it has a configuration files where you go to Change the channel !!
The problem is the .HEX files that you go to put in the IDE of Arduiono and that write the new BootLoader on Arduino, these predispose the channel 76 in reception, and here the problem .....
In addition, as already mentioned, I noticed that the arduino of which you change the Bootloader have problems when you remove the power and put it back .... Many times they lose the sketch

Excuse me but I go a little OT ..... What dashboard and this are you using?

No for OTA the Defaul channel and 76, the one with which and by default MYSENSORS, you should change it to MYSController, but I do not know how to do it !!
I also sent a message to the TEKKA user who invented MYSController, but I did not get an answer !!
If someone knows how to do it ?? It would give us a great help ....