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Refoss Open API Wi-Fi Dual Channel Relay Switch, R21 (R21)
Model: R21 · SKU: R21
Prepared Nov 12, 2026
Common specifications
| Device type | In-wall switchSource [1] |
|---|---|
| Max switched load (A) | Not documented |
| Max switched load (W) | Not documented |
| Measurement channels | Dual Channel Control: Manage two devices independently with a single unit, perfect for controlling multiple home appliances or lighting circuits.Source [1] |
| Current sensors | Not documented |
| Current rating | Not documented |
| Voltage range | Not documented |
| Accuracy | Not documented |
| Communications | Fully Open API Access: Supports JSON-RPC 2.0 via HTTP, webhook, and MQTT for advanced custom integrations.Source [1] |
| Display | Not documented |
| Power input | Not documented |
| Mounting | Not documented |
| Safety listing | Not documented |
| Weight | Not documented |
| Dimensions | Not documented |
| Enclosure volume | Not documented |
| Warranty term | Not documented |
All recorded specifications
| Communications | Fully Open API Access: Supports JSON-RPC 2.0 via HTTP, webhook, and MQTT for advanced custom integrations.Documented claim ConditionsPrinted as "Fully Open API Access: Supports JSON-RPC 2.0 via HTTP, webhook, and MQTT for advanced custom integrations.". Location: Product page and documents as quoted Printed as "Fully Open API Access: Supports JSON-RPC 2.0 via HTTP, webhook, and MQTT for advanced custom integrations.". Location: Product page and documents as quoted |
|---|---|
| Device type | In-wall switchDocumented claim ConditionsPrinted as "Refoss Open API Wi-Fi Dual Channel Relay Switch, R21"; "Energy Monitor: Track energy consumption for connected devices in real-time, providing valuable insights into power usage and enabling smarter energy management". Location: product title ("Relay Switch"; behind-the-wall placement not stated in words on the R21 page) Printed as "Refoss Open API Wi-Fi Dual Channel Relay Switch, R21"; "Energy Monitor: Track energy consumption for connected devices in real-time, providing valuable insights into power usage and enabling smarter energy management". Location: product title ("Relay Switch"; behind-the-wall placement not stated in words on the R21 page) |
| Measurement channels | Dual Channel Control: Manage two devices independently with a single unit, perfect for controlling multiple home appliances or lighting circuits.Documented claim ConditionsPrinted as "Dual Channel Control: Manage two devices independently with a single unit, perfect for controlling multiple home appliances or lighting circuits.". Location: Product page and documents as quoted Printed as "Dual Channel Control: Manage two devices independently with a single unit, perfect for controlling multiple home appliances or lighting circuits.". Location: Product page and documents as quoted |
Warranty
Certificate records
No records documented.
Sources and revisions
- Refoss product page: Refoss Open API Wi-Fi Dual Channel Relay Switch, R21 (captured October 12, 2026)Official product page · Checked https://refoss.net/products/smar-relay-switch-r21