Shelly BLU Gateway Gen3 - Unable to set BLU TRV position via Scrip

Hi everyone,

I am struggling to control my Shelly BLU TRV position using a script on my Shelly BLU Gateway Gen3. No matter which RPC method I call, I constantly receive a "404 No handler" error.

My Setup:

• Gateway: Shelly BLU Gateway Gen3 (Firmware: [ Inserisci qui la versione firmware, es: 1.4.2 ])
• Device: Shelly BLU TRV, correctly paired and visible in the app.
• Device ID: 200 (identified as blutrv:200 and bthomedevice:200 in the logs).

The Problem: I want to set the valve position (e.g., 50%) via script. I have tried several methods, but all of them return {"code":-404, "message":"No handler for..."}.

Tested Methods (All failed with 404):

1. Shelly.call("blutrv:200.SetPosition", {"pos": 50});
2. Shelly.call("BTHome.RemoteCall", {"address": "f8:44:77:2a:4a:80", "method": "TRV.SetPosition", "params": {"pos": 50}});
3. Shelly.call("bthomedevice:200.RpcCall", {"method": "TRV.SetPosition", "params": {"pos": 50}});
4. Shelly.call("TRV.SetPosition", {"id": 200, "pos": 50});

Debug Info (from Shelly.getComponentConfig

JSON

{
  "id": 200,
  "addr": "f8:44:77:2a:4a:80",
  "name": "Camera SX P2",
  "trv": "bthomedevice:200",
  "temp_sensors": [],
  "dw_sensors": [],
  "override_delay": 30,
  "meta": {}
}

When I try to list methods using Rpc.ListMethods filtered for the device, the response seems empty or the handler is missing.

Question: What is the correct RPC syntax for the Gen3 Gateway to send a SetPosition command to a BLU TRV? Does this firmware version support direct position control via scripting, or should I use a different component path?

Thanks in advance for your help!

Hi tvbshelly,

I wanted to confirm that the solution provided worked perfectly!

The correct syntax to control the Shelly BLU TRV position through the Gen3 Gateway script is indeed using the BluTrv.Call method and, crucially, specifying "id": 0 inside the params object.

Here is the working snippet for anyone else facing this issue:

Shelly.call(
  "BluTrv.Call", 
  {
    "id": 200, // The component ID
    "method": "TRV.SetPosition", 
    "params": {
      "id": 0, // Mandatory internal service ID
      "pos": 50
    }
  }
);

Thank you very much for your support and for helping me solve this.

Best regards.

Solved