Before continuing, make sure you have followed the WiFi setup steps exactly as shown in the written instructions or video guides:

Connecting Your AirGradient ONE to WiFi

Connecting Your AirGradient Open Air to WiFi

If the setup steps or videos were skipped, incomplete, or done in a different order, Wi-Fi connection issues are very likely.

Only continue with the troubleshooting steps below after confirming the setup guide was followed correctly.

If the WiFi network you want to connect your AirGradient ONE to doesn’t appear in the WiFi configuration settings, or the device fails to connect, it’s almost always due to one of the limitations below:

5 GHz Wi-Fi is not supported

AirGradient devices only support 2.4 GHz WiFi.

• 5 GHz-only networks will not appear in the Wi-Fi configuration menu.

• A single (unified) SSID (WiFi name) that combines 2.4 GHz + 5 GHz can cause connection failures. This behavior depends on the router.

Some routers with a single (unified) SSID for both 2.4 GHz and 5 GHz work fine. Others don’t, and may prevent the device from seeing the network or completing setup. If this happens, the best split the Wi-Fi into two separate SSIDs:

• one for 2.4 GHz

• one for 5 GHz

Then, connect the device to the 2.4 GHz SSID

Important Note

• The steps to split Wi-Fi radios vary by router manufacturer. In most cases, you need to disable “band steering”.

Quickly rule out device vs. network issues (Mobile Hotspot Test)

One of the fastest ways to identify whether the issue is with your AirGradient device or your Wi-Fi network is to try connecting the device to a mobile hotspot.

How to test

• Enable a mobile hotspot on your phone (make sure it uses 2.4 GHz, if your phone allows choosing). If using an iPhone and the hotspot does not appear, turn on Maximize Compatibility in Settings → Personal Hotspot.

• Use a simple hotspot name (SSID) and password (avoid special characters)

• Go through the normal Wi-Fi setup steps and connect your AirGradient device to the hotspot

What this tells you

If the device connects successfully to the hotspot and shows online in the Dashboard:

• The device is working correctly
• The issue is with your Wi-Fi network (router settings, firewall, band steering, etc.)

If the device fails to connect to the hotspot as well:

• There may be a device-related issue
• Proceed with firmware reflash or contact support.

Enterprise / managed networks are not supported

AirGradient devices do not support enterprise or managed Wi-Fi networks, including WPA2-Enterprise or WPA3-Enterprise, certificate-based authentication, captive portals (login pages), or networks that require a proxy.

These types of networks are commonly used in schools, universities, corporate offices, government buildings, hotels, and public Wi-Fi.

If you are on such a network, contact your IT administrator and either connect the device to a standard 2.4 GHz personal Wi-Fi network or deploy it on a separate IoT / sensor-only Wi-Fi network.

Firewall and outbound traffic restrictions

Some networks block outbound traffic by default. If outbound access is restricted, the Wi-Fi setup may fail during setup or the device will appear “offline” on the Dashboard after setup.

AirGradient devices require outbound HTTPS access only to :

91.98.9.143 and 46.225.42.92

Test Network Connectivity (Ping Test)

If the device connects to Wi-Fi but shows offline in the Dashboard and the purple LED on the device in on, the network may be blocking outbound traffic.

AirGradient devices require outbound HTTPS access to:

91.98.9.143 and 46.225.42.92

You can test basic network reachability from the same network using a computer. Run in a Terminal (iOS) or Command Prompt (Windows):

ping hw.airgradient.com

Expected Result

You should see replies similar to:

64 bytes from 91.98.9.143: icmp_seq=0 ttl=49 time=68.751 ms

If you get a timeout response:

• The network is likely blocking outbound traffic

• Ask IT to allow outbound HTTPS traffic to 91.98.9.143 and 46.225.42.92

Hidden SSIDs

Hidden networks usually won’t show up in the list. Enter the SSID and password manually in this case.

Router security settings

Some routers block new or IoT devices by default.

Check for:

• MAC filtering: use the device serial number to set up an exception.The monitor serial number (SN) is the device’s MAC address, formatted without colons. Example: Serial number shown on device / dashboard: abcdefghijkl ; corresponding MAC address: ab:cd:ef:gh:ij:kl

• “Allow only approved devices” settings

Still not working?

• Power-cycle the router

• Reset the device’s Wi-Fi configuration and try again

• Move the device closer to the router during setup

• Power cycle the monitor itself.

• Reflash the device firmware.

• Contact us via the Support Form or email support@airgradient.com