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Autor
Hi Shelly, I'm trying locally to interlock a Shelly2 without much success.
Why can't this be done locally from your software, it works in flashed to Tasmota, but not in your programme
Has DeepSeek is a thing i asked it. "code a shelly2 to interlock relays" did not work, Why?
To interlock two relays on a Shelly 2 device, you need to ensure that only one relay can be active at any given time. This is commonly used in applications like controlling a motor's forward and reverse directions, where both relays should never be on simultaneously.
Here’s how you can achieve this using the Shelly 2's built-in scripting capabilities:
### Step 1: Set Up the Shelly 2
1. **Connect the Shelly 2** to your Wi-Fi network and configure it using the Shelly app or web interface.
2. **Assign the relays** to the appropriate outputs (e.g., Relay 1 and Relay 2).
### Step 2: Write the Interlock Script
Shelly devices support scripting using the **Shelly Scripting API**. Below is an example script that ensures only one relay is active at a time.
```
javascript
// Define the relays
let relay1 = "0"; // Relay 1
let relay2 = "1"; // Relay 2
// Function to turn on Relay 1 and turn off Relay 2
function turnOnRelay1() {
Shelly.call("Switch.Set", { id: relay1, on: true });
Shelly.call("Switch.Set", { id: relay2, on: false });
}
// Function to turn on Relay 2 and turn off Relay 1
function turnOnRelay2() {
Shelly.call("Switch.Set", { id: relay2, on: true });
Shelly.call("Switch.Set", { id: relay1, on: false });
}
// Function to handle relay toggling
function toggleRelays(relay) {
if (relay === relay1) {
turnOnRelay1();
} else if (relay === relay2) {
turnOnRelay2();
}
}
// Add event listeners for relay changes
Shelly.addEventHandler(function (event) {
if (event.component === "switch:" + relay1 && event.info.output === true) {
toggleRelays(relay1);
} else if (event.component === "switch:" + relay2 && event.info.output === true) {
toggleRelays(relay2);
}
});
```
### Step 3: Upload the Script
1. Open the Shelly web interface.
2. Go to **Scripts** and create a new script.
3. Paste the above code into the script editor.
4. Save and enable the script.
### Step 4: Test the Interlock
- Use the Shelly app, web interface, or physical switches to toggle the relays.
- Verify that only one relay can be active at a time. If you try to turn on the second relay, the first one should automatically turn off.
### Explanation of the Script
- The script defines two relays (`relay1` and `relay2`).
- It includes functions to turn on one relay while ensuring the other is turned off.
- An event listener monitors changes to the relays and enforces the interlock logic.
This setup ensures safe operation by preventing both relays from being active simultaneously. Let me know if you need further assistance!
