How to Use Shelly 1 mini gen3: Examples, Pinouts, and Specs

The Shelly 1 Mini Gen3 (Manufacturer Part ID: shelly1mg3) is a compact Wi-Fi relay switch designed for seamless integration into smart home systems. Manufactured by Shelly, this device enables remote control of electrical appliances and lighting through a smartphone app or home automation platforms. Its small size and versatile compatibility make it an ideal choice for retrofitting existing electrical installations with smart functionality.

• Remote control of lights, fans, and other electrical devices.
• Integration with smart home ecosystems such as Google Home, Amazon Alexa, and Home Assistant.
• Automation of appliances based on schedules or triggers.
• Retrofitting traditional switches for smart functionality without replacing them.

The Shelly 1 Mini Gen3 has a simple terminal block for wiring. Below is the pin configuration:

1. Power Connection:

   • For AC power: Connect the L and N terminals to the live and neutral wires of your AC power supply.
   • For DC power: Connect the + and - terminals to the positive and negative terminals of your DC power source (24-30V DC).

2. Load Connection:

   • Connect the device or appliance you want to control to the O terminal.
   • Ensure the load does not exceed the maximum rating of 16A.

3. Switch Connection (Optional):

   • If you want to use a physical wall switch, connect it to the SW and I terminals.

4. Wi-Fi Setup:

   • Download the Shelly Cloud App from the iOS App Store or Google Play Store.
   • Power on the Shelly 1 Mini Gen3 and follow the app's instructions to connect it to your Wi-Fi network.

5. Integration with Home Automation:

   • Use the app to configure the device for integration with platforms like Google Home, Amazon Alexa, or Home Assistant.
   • For advanced users, configure MQTT or HTTP protocols for custom automation.

• Ensure the device is installed in a well-ventilated area to prevent overheating.
• Always turn off the power supply before wiring the device to avoid electric shock.
• Use appropriate wire gauges and connectors to handle the load current safely.
• If using the device with a DC power supply, ensure the voltage is within the specified range (24-30V DC).
• Regularly update the firmware via the Shelly Cloud App to ensure optimal performance and security.

The Shelly 1 Mini Gen3 can be controlled via HTTP requests. Below is an example of how to toggle the relay using an Arduino UNO with Wi-Fi capabilities (e.g., ESP8266 module):

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

// Wi-Fi credentials
const char* ssid = "YourWiFiSSID";       // Replace with your Wi-Fi SSID
const char* password = "YourWiFiPassword"; // Replace with your Wi-Fi password

// Shelly 1 Mini Gen3 IP address
const char* shellyIP = "192.168.1.100";  // Replace with the Shelly's IP address

void setup() {
  Serial.begin(115200); // Initialize serial communication
  WiFi.begin(ssid, password); // Connect to Wi-Fi

  // Wait for Wi-Fi connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to Wi-Fi...");
  }
  Serial.println("Connected to Wi-Fi");
}

void loop() {
  // Create an HTTP client
  HTTPClient http;

  // URL to toggle the relay
  String url = String("http://") + shellyIP + "/relay/0?turn=toggle";

  // Send the HTTP GET request
  http.begin(url);
  int httpCode = http.GET();

  // Check the response
  if (httpCode > 0) {
    Serial.println("Relay toggled successfully");
  } else {
    Serial.println("Failed to toggle relay");
  }

  http.end(); // Close the connection

  delay(5000); // Wait 5 seconds before toggling again
}

1. Device Not Connecting to Wi-Fi:

   • Ensure the Wi-Fi network is 2.4 GHz, as the Shelly 1 Mini Gen3 does not support 5 GHz networks.
   • Check that the Wi-Fi credentials entered in the app are correct.
   • Move the device closer to the router during the initial setup.

2. Relay Not Switching:

   • Verify that the load connected to the O terminal is within the maximum rating (16A).
   • Check the wiring to ensure all connections are secure and correct.

3. Device Not Responding to HTTP Requests:

   • Confirm that the Shelly 1 Mini Gen3 is powered on and connected to the network.
   • Verify the IP address of the device in the HTTP request.
   • Ensure the device's firmware is up to date.

4. Overheating:

   • Ensure the device is not installed in an enclosed or poorly ventilated space.
   • Check that the load does not exceed the maximum power rating.

• Can I use the Shelly 1 Mini Gen3 with a 3-way switch? Yes, the device supports multi-way switch configurations. Refer to the Shelly Cloud App for wiring diagrams.

• Does the Shelly 1 Mini Gen3 support dimming? No, this model is a relay switch and does not support dimming functionality.

• Can I control the device without an internet connection? Yes, the Shelly 1 Mini Gen3 can be controlled locally via its IP address using HTTP or MQTT protocols.

• Is the device compatible with Apple HomeKit? The Shelly 1 Mini Gen3 is not natively compatible with HomeKit, but it can be integrated using third-party tools like Homebridge.

This concludes the documentation for the Shelly 1 Mini Gen3. For further assistance, refer to the official Shelly support resources.