Shelly Plug S Gen3 Device Contract

This is a device contract skill. It does not install SmartClaws, register a device, or define an agent role. Use it with smartclaws-master-agent or smartclaws-bridge-agent.

Device Identity

• Vendor: Shelly
• Device: Shelly Plug S Gen3, Type F variant
• Capability: one relay switch channel with built-in power metering
• Local protocol: Shelly Gen2+/Gen3 JSON-RPC over HTTP
• Controllable component: switch:0

SmartClaws Channels

The setup must provide channel addresses in SMARTCLAWS.md.

• Outgoing telemetry channel: required.
• Incoming command channel: required only for commandable setups.

Do not invent channel addresses. If a channel is missing, ask for setup.

Telemetry Topic

Topic: telemetry.switch_status

Normalized payload:

{
  "output": true,
  "apower_w": 852.3,
  "voltage_v": 230.1,
  "current_a": 3.7,
  "energy_total": 142.4,
  "temperature_c": 41.5
}

Fields:

• output: relay state, true = ON, false = OFF.
• apower_w: active power in watts.
• voltage_v: mains voltage.
• current_a: current draw in amps.
• energy_total: cumulative energy value reported by Shelly.
• temperature_c: plug internal temperature in Celsius; not room temperature.

Shelly RPC source mapping:

• output <- Switch.GetStatus?id=0.output
• apower_w <- apower
• voltage_v <- voltage
• current_a <- current
• energy_total <- aenergy.total
• temperature_c <- temperature.tC

Command Topic

Topic: command.switch.set

Payload:

{
  "on": true,
  "toggle_after": 0
}

Validation:

• on is required boolean.
• toggle_after is optional non-negative integer seconds.
• toggle_after: 0 means no auto-revert.
• Reject strings, floats, negative values, null, and unknown command topics.

Effect:

• on: true maps to relay ON.
• on: false maps to relay OFF.

Local RPC Methods

Read device info:

GET /rpc/Shelly.GetDeviceInfo

Read relay/power state:

GET /rpc/Switch.GetStatus?id=0

Set relay state:

GET /rpc/Switch.Set?id=0&on=true
GET /rpc/Switch.Set?id=0&on=false

If authentication is enabled, the bridge setup must provide the credential path or mechanism. Do not print credentials.

Master-Agent Use

A master may:

• Read telemetry.switch_status from the outgoing channel.
• Decide whether a command is needed.
• Publish command.switch.set only when setup authority allows it. With the SmartClaws plugin, use smartclaws_publish with the registered device name and deviceChannel: "command" so the write goes through SmartClawsDevice.publishCommand.

A master must not:

• Call Shelly RPC directly.
• Treat plug internal temperature as room temperature.
• Re-send commands repeatedly without checking recent telemetry/decision state.

Bridge-Agent Use

A bridge may:

• Read Shelly RPC status and publish telemetry.switch_status.
• In command-enabled modes, read command.switch.set from the incoming channel and call Switch.Set.
• Persist the last handled command offset in its setup state file.

A bridge must not:

• Execute unknown command topics.
• Reprocess already-handled command offsets.
• Publish fake telemetry unless explicitly running a labelled simulation.

Sanity Rules

• output must be boolean.
• Power, voltage, current, energy, and temperature must be numeric when present.
• Missing optional numeric fields may be omitted; do not invent values.
• If Shelly is unreachable, publish no telemetry for that cycle and log/fail loud.

References

• Shelly Plug S Gen3 docs: https://shelly-api-docs.shelly.cloud/gen2/Devices/Gen3/ShellyPlugSG3
• Shelly Switch component RPC: https://shelly-api-docs.shelly.cloud/gen2/Components/FunctionalComponents/Switch/
• Shelly RPC protocol: https://shelly-api-docs.shelly.cloud/gen2/General/RPCProtocol