Wi-Fi product frequently goes offline?

Wi-Fi connectivity issues are typically caused by physical barriers, network settings, or electrical power factors. If your device frequently drops offline, please check the following common scenarios:

1. Weak Signal or Metal Enclosure Interference

• Cause: If the sensor is installed inside a fully metal distribution board, or separated from the router by thick concrete walls, the Wi-Fi signal will be significantly weakened (acting as a Faraday cage).

• Solution: Plug a Wi-Fi repeater/extender into an outlet as close to the distribution board as possible. Alternatively, consider using a distribution board with a plastic front cover/door, which allows Wi-Fi signals to pass through while keeping the metal back box compliant with local regulations.

2. "Band Steering" & 2.4GHz Compatibility

• Cause: Modern routers often use "Band Steering" (combining 2.4GHz and 5GHz under one Wi-Fi name). To optimize overall network speed, the router's logic will actively disconnect devices from the 2.4GHz band to force them onto the faster 5GHz band. Since the smart meter only has a 2.4GHz chip, it cannot connect to 5GHz and simply drops offline.

• Solution: Log into your router settings and separate the 2.4GHz and 5GHz networks into two different names (SSIDs), or create a dedicated 2.4GHz "Guest Network" specifically for your smart home devices.

3. Router Device Limit (Overcrowded Network)

• Cause: Standard home routers have a limit on how many devices can connect simultaneously. When overloaded, the router may temporarily kick devices offline to free up bandwidth.

• Solution: Disconnect a few inactive Wi-Fi devices to see if stability improves, or consider upgrading your router/adding a dedicated Access Point.

4. Incorrect Voltage System (Mismatched Grid)

• Cause: Installing the device on an incompatible power grid. For example, using an IEC 220-240V rated product on a 120V system (such as a single leg of a North American Split-Phase system). The 120V supply is far below the required operating voltage, causing the Wi-Fi module to fail or constantly reboot.

• Solution: Verify your local grid type before installation. Ensure the device is connected to the correct voltage (e.g., connecting across L1 and L2 for 240V in a split-phase system, or using a specific 120V version of the product).

5. Grid Voltage Fluctuations

• Cause: The device may reboot or drop offline if the local grid voltage fluctuates beyond its standard operating range (85% to 110% of the rated voltage).

• Solution: Ensure your local grid voltage is stable. For example, the IEC version of the SPM01 Wi-Fi is rated for 220V–240V. It requires a stable voltage between 187V and 264V (220V × 0.85 to 240V × 1.1). Extreme voltage drops or surges will cause the device to power cycle and lose connection.

💡 Pro Tip: Assign a Static IP To prevent IP conflicts (which can also cause offline issues when your router reassigns IP addresses after a power outage), we highly recommend logging into your router and assigning a Static IP (DHCP Reservation) to the sensor.