Wi-Fi Troubleshooting [HC-1454] (#377)

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content/Arduino Cloud/General Cloud/If-your-Arduino-device-can-t-connect-to-a-Wi-Fi-network.md

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+---
+title: "If your Arduino device can’t connect to a Wi-Fi network"
+---
+
+Learn how to troubleshoot Wi-Fi connectivity issues if your Arduino device can't connect to a network. Check the sections below to identify and resolve potential issues.
+
+---
+
+## 1. Connect to a 2.4 GHz network
+
+Arduino boards and most IoT devices can only be used with 2.4 GHz networks. The 2.4 GHz band offers better range and signal strength through obstacles compared to the 5 GHz band. Learn [how to check if your network operates on the 2.4 GHz band](https://support.arduino.cc/hc/en-us/articles/14144656051740-Supported-Wi-Fi-bands).
+
+> [!TIP]
+If your network operates on the 5 GHz band, a quick solution is to [create a 2.4 GHz network using the hotspot feature on an Android or iOS device](https://support.arduino.cc/hc/en-us/articles/14144656051740-Supported-Wi-Fi-bands#create-hotspot).
+
+## 2. Avoid common network names
+
+Make sure your Wi-Fi network has a distinct name. Avoid using generic names like 'default' or 'home' to prevent your device from accidentally connecting to a different network with the same name, which can lead to performance issues.
+
+## 3. Reset network credentials for your Thing
+
+### Verifying or changing network credentials in Arduino Cloud
+
+If the Wi-Fi connection is not working, you might need to reset the [network credentials](https://support.arduino.cc/hc/en-us/articles/360016495559-Add-and-connect-a-device-to-Arduino-Cloud#:~:text=Click%20the%20Network,adding%20the%20device) for your Thing in Arduino Cloud.
+
+1. Navigate to the [Thing](https://app.arduino.cc/things) that is experiencing Wi-Fi issues.
+
+1. Under **Network**, click the button labeled "Change"
+
+1. Re-enter your Wi-Fi credentials with your Wi-Fi Name (SSID) and Password (Encryption Key). Ensure there are no typos and the credentials match those set on your router.
+
+1. Open the sketch and click the **Upload** button to properly apply the new network settings to your device.
+
+### Verifying or changing the credentials defined in the sketch
+
+To verify or change the network credentials directly defined in a sketch, whether the sketch was created in Arduino Cloud or IDE, follow these steps:
+
+1. Locate the section in your Arduino sketch where the network credentials are defined. This is typically in the main sketch file, the `arduino_secrets.h` file (for the IDE), or the **Secret** tab (for Arduino Cloud).
+
+1. Check the variables for SSID and password to ensure they match your network credentials. You may also need to modify the "key index" value if you're using a WEP encrypted network.
+
+1. After making any necessary changes, save the sketch.
+
+1. Upload the modified sketch by clicking the Upload button in the Arduino IDE or Cloud Editor.
+
+Additionally, you can check Serial Monitor for error messages. This can provide insight into what might be going wrong during the connection process.
+
+## 4. Check your power supply
+
+Wi-Fi connectivity problems are often caused by insufficient power. Since Wi-Fi usage demands more power than other operations, ensure your device is adequately powered by:
+
+- Connecting your device directly to a USB port on your computer or a dedicated power source. USB hubs might not supply sufficient power, especially if multiple devices are connected.
+
+- Ensuring you are using a high-quality USB cable capable of delivering consistent power.
+
+- Verifying that your power supply meets the necessary input voltage for your device. You can find hardware information for your device in [Arduino Docs](https://docs.arduino.cc/hardware/).
+
+For more detailed information about power supplies, you can find additional guidance [here](https://support.arduino.cc/hc/en-us/articles/360018922259-What-power-supply-can-I-use-with-my-Arduino-board).