Bad configuration for a dry contact relay with ESP8266

[MaximeNv]

Hi,

I am currently working on my roller shades' controllers (only way I found to add them in my Home).

My plan is to replicate a push on each button of the controller via a dry contact relay.

For that, I use an ESP8266, and a relay. Hardware is working fine, as I tested it in other circumstances.

I think HAA is correctly configured on my ESP, as I can see it and add it to my Home App.

Here comes my problem : I do not manage to build the right JSON to control my relay.

Here under, code as I try to paste it in HAA setup :

{
"a": [
{
"t": 1,
"i": 1,
"0": {
"r": [
{
"g": 12,
"v": 0,
"i": 1
}
]
}
}
]
}

I probably missed something, but don't understand what precisely..

Thanks for any future help and insights !