@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 ....

@sindrome73 Hello!! after many tests maybe I could solve the problem, but now I have another question.
So I discovered that the problem that OTAQs did not work is because I changed the default Radio channel of mysensors for RF24 radios

Now my question and this, you can use a different channel for OTA updates, if you like ??

Hello!!
I managed with some time doing OTA updates of a node using MYSBootloader, and after some tests, OTAs work.

The node in question is a 5v pro-mini arduino with RF24 radio

But I'm having problems now, I noticed that the node, followed by some power failures and as if he lost the sketc, and then I have to reload the sketch via FTDI.

In addition now on this node, once the sketch is reloaded I am no longer able to do the OTA update via MYSController connected to a serial gateway.

In addition I wanted to ask for a clarification, for an Arduino Pro-Mini 5v at 16Mhz, the fuses with AVRDUDESS must be set as follows:

L = 0xFF
H = 0xDA
E = 0x06

This could be for you: https://it.aliexpress.com/item/plastic-outer-shield-for-thermo-hygro-sensor-spare-part-for-weather-station-Transmitter-thermo-hygro-sensor/32793243933.html?spm=a2g0s.8937460.0.0.f3dWg7

plastic outer shield for thermo hygro sensor, spare part for weather station (Transmitter / thermo hygro sensor)

$5.86

Ok, now it's clearer

@kalina
And then once connected to the Raspy ?? What are you doing?? And a new thing for me !!

@kalina said in What did you build today (Pictures) ?:

ione di installare questa scatola

if I can know !! The audio socket what is it for ???

Other sketches work, already tried !! And this from problems with 2.2