Ok, fine, I'll give a try.
Thanks again

And after a node reboot, the notify.mysensors service appears too :

TSF:MSG:SEND,232-232-0-0,s=1,c=1,t=47,pt=0,l=12,sg=0,ft=0,st=OK:It works !!!

Oh yeeeess !

  version: '2.3'  

did the trick ! Incredible ! I still have no notify.mysensors in the services, but it doesn't matter, I can now send infos to my nodes :

2020-04-17 18:01:35 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Citerne 1: value_type 47, value = -

Thank you so much !

Serial monitor :

30439 TSF:MSG:SEND,66-66-0-0,s=1,c=2,t=47,pt=0,l=0,sg=0,ft=0,st=OK:
Sending initial value
32448 TSF:MSG:SEND,66-66-0-0,s=1,c=1,t=47,pt=0,l=1,sg=0,ft=0,st=OK:-
Requesting initial value from controller
32456 TSF:MSG:SEND,66-66-0-0,s=1,c=2,t=47,pt=0,l=0,sg=0,ft=0,st=OK:
Sending initial value
34464 TSF:MSG:SEND,66-66-0-0,s=1,c=1,t=47,pt=0,l=1,sg=0,ft=0,st=OK:-
Requesting initial value from controller
34473 TSF:MSG:SEND,66-66-0-0,s=1,c=2,t=47,pt=0,l=0,sg=0,ft=0,st=OK:
Sending initial value
36483 TSF:MSG:SEND,66-66-0-0,s=1,c=1,t=47,pt=0,l=1,sg=0,ft=0,st=OK:-
Requesting initial value from controller
36493 TSF:MSG:SEND,66-66-0-0,s=1,c=2,t=47,pt=0,l=0,sg=0,ft=0,st=OK:

And in HA

2020-04-17 08:42:48 DEBUG (MainThread) [mysensors.handler] n:0 c:255 t:3 s:9 p:137717498 TSF:MSG:READ,66-66-0,s=1,c=1,t=47,pt=0,l=1,sg=0:-
2020-04-17 08:42:48 WARNING (MainThread) [mysensors] Not a valid message: Not valid message sub-type: 47 for dictionary value @ data['sub_type']
2020-04-17 08:42:48 DEBUG (MainThread) [mysensors.handler] n:0 c:255 t:3 s:9 p:137717507 TSF:MSG:READ,66-66-0,s=1,c=2,t=47,pt=0,l=0,sg=0:
2020-04-17 08:42:48 WARNING (MainThread) [mysensors] Not a valid message: Not valid message sub-type: 47 for dictionary value @ data['sub_type']
2020-04-17 08:42:50 DEBUG (MainThread) [mysensors.handler] n:0 c:255 t:3 s:9 p:137719517 TSF:MSG:READ,66-66-0,s=1,c=1,t=47,pt=0,l=1,sg=0:-
2020-04-17 08:42:50 WARNING (MainThread) [mysensors] Not a valid message: Not valid message sub-type: 47 for dictionary value @ data['sub_type']
2020-04-17 08:42:50 DEBUG (MainThread) [mysensors.handler] n:0 c:255 t:3 s:9 p:137719526 TSF:MSG:READ,66-66-0,s=1,c=2,t=47,pt=0,l=0,sg=0:
2020-04-17 08:42:50 WARNING (MainThread) [mysensors] Not a valid message: Not valid message sub-type: 47 for dictionary value @ data['sub_type']

@electrik When I replace in the sketch :

request(CHILD_ID, V_TEXT);

With

request(CHILD_ID, V_TEMP);

I could receive a message from HA. Very strange.

With another gateway, an ethernet one, I'd like to do use MQTT communication both ways.

@electrik said in Send a text to node:

Does your sketch fulfill the requirements from this page? https://www.home-assistant.io/integrations/notify.mysensors/

The problem is that I have no notify.mysensors service in HA :

I tried to use the sketch from your page, but could not receive any V_TEXT message.

@skywatch HA might not be the ideal controller to work with mysensors. I ordered an ethernet gateway. Once delivered (6 weeks) I'll hope it will better communicate with mysensors.

I have about 20 mysensors’s node, who send their values to HA, through a USB gateway.
This way is OK.

But now, I need to send infos from HA to my nodes (for LCD displaying, etc.)
I tried with notify.mysensors, but I cannot get it to work : there is no sevice called like that.
And it seems to be abandonned :

https://www.home-assistant.io/integrations/notify.mysensors/
https://forum.mysensors.org/topic/10488/homeassistant-mysensors-notify-does-nothing-alternatives/7

Does someone have a workaround or knows how to integrate the that service in HA ?

Ok, fine, I'll give a try.
Thanks again

Nice Work, especially the Box.
Could you give details about the wiring ? How do you read the smoke detector ? On piezo ?

I planned to build one since a while. So now I know what to do. Besides, Jeedom can integrate it.
Thanks a lot.

@sundberg84 Even without fun, it would do the trick :-). Would you have a link for your item ? Did you couple it with a mySensor Node, or directly in your system (I'm running Jeedom)