I took the one with the option “RS232 for Home Automation”…
it was the beginning of the end… I bought a google home max, philips hue, and now I’m starting with openhab
I’ve made a few search, and I’ve not found any binding for this screen or this brand.
I’ve contacted the support of lumene and ask about “how to do home automation with their screen, a 200€ option”, and the answer was very limited…
Any idea if those screen have a common protocol used by all brand ? (one can dream )
Well, I’ve no idea except that they say RS232.
As said, they didn’t provide much information with the screen.
I’ve mailed the company to get the protocol description.
From a physical point of view here is the connections available :
That’s as much as you can do now.
Once you know, you maybe able to control it with the serial binding directly or use an arduino as an interface (OpenHAB - MQTT - Serial) for example
Voltage on the serial bus? 3.3v, 5v, 12v???
Which pin is which. TX and RX?
I would use an arduino for testing. If you blow the serial port, then it’s only an arduino. Not a pi or your computer.
Maybe then port the arduino code to an ESP board and send the commands over MQTT.
Vous n’avez pas besoin de ces informations, notre matériel respecte la norme RS232.
Suivez les instructions et cela fonctionnera.
Pour votre information la norme indique qu’un 1 est reconnu si la tension est inférieure à −3 V, et un 0 est reconnu si la tension est supérieure à +3 V.
Et le TS/RS (TX/RX en fait), est normé par rapport aux pin du DB9.
Which gives in English :
You don’t need this informartion, our hardware respect the RS232 standard.
follow “the instruction” and it will work.
FYI, 1 is recognized if the voltage is lower than -3v and 0 above +3v.
TX/RX is a DB9 standard