Help Us with the Wi-Fi Issue of Firmware 3.6.0

Tai_AirGradient · April 14, 2026, 3:44am

Hi @Shinji, would you mind trying to clean-flash a firmware to your monitor?

Connect your monitor to your PC via a USB cable, and go to AirGradient ONE (I-9PSL), Open Air (O-1PST) and Open Air Max (O-M-1PPST...) Firmware Versions

Follow the instructions there, and when this window is prompted, please check ‘Erase device’. Please note that this will erase your previous configurations, you’ll have to connect it to your Wi-Fi again after this (as if you have just received a new monitor).

After the flashing is finished, please try connecting your monitor to your AP.

Note that if you had selected your target firmware on the AirGradient Dashboard to 3.4.1, on the first boot after firmware flash (the firmware here is 3.6.2), the monitor might not be responsive for a while, as it will try to communicate with the server and downgrade itself to 3.4.1. It will take a while.

Shinji · April 19, 2026, 1:50pm

Hello @Tai_AirGradient, I apologise for the delay. I tried the erase procedure for my initial report, but I have done it again just in case it behaves differently coming from 3.4.1.

Unfortunately, the symptoms are the same. It fails to connect to my home network but can connect to my phone.

Tai_AirGradient · April 20, 2026, 2:31am

Hi @Shinji, thank you for your reply!

Given that the AirGradient monitor can connect to your phone’s hotspot, it sounds like there’s something to do with your Wi-Fi access point. Could you please provide the information regarding these so we can investigate further?:

- Network setup: Describe your network setup. Please also specify the brand and model of each network equipment.
- Is your Wi-Fi a mesh system, have multiple access points, or use Wi-Fi extender?
- Do you have your Wi-Fi DHCP server configured to assign a static IP address for connected devices?
- Could you please provide a screen recording or screenshots when you are trying to connect the AirGradient monitor to Wi-Fi and get the error message?

Thanks a lot in advance!

Shinji · April 20, 2026, 7:26pm

Hello @Tai_AirGradient, I’ve done some troubleshooting with my WiFi configuration. I use Unifi for my access points (only). I finally got it connected to my network.

I have a theory now since after reconnecting, I was reminded that I “locked” the device to a particular AP. I think that because of how the locking is implemented, the monitor cannot initially connect to the SSID unless the AP it’s locked to is the only AP broadcasting the SSID. This holds true even if the monitor is right next to that AP. After it’s configured and connected once, the monitor has no problem with the lock, and is able to reconnect even after a power cycle.

I probably didn’t encounter this issue before since I configured the AP lock after initial setup of the monitor, and perhaps the firmware update in February essentially caused the monitor to go through some part of initial WiFi configuration again that doesn’t work with the lock.

I’m happy to provide more details in the support ticket, or do more specific troubleshooting to help support my environment, but I’m also happy to consider this as an unsupported WiFi configuration. In any case, thank you for your assistance in troubleshooting this!

Tai_AirGradient · April 21, 2026, 5:30am

Hello @Shinji, that’s impressive! Thank you for providing your findings.

Of course, we will greatly appreciate it if you could please provide more details about this, so we can document it and help people who will be experiencing an issue like this in the future.

If you don’t mind (I’m not sure if I’m asking too much), could you please create a forum post (topic) in the forum (Support category) discussing your issue and how you troubleshooted it? With a public post like this, it will not just help us improve our support experience, but will also be very helpful for the whole community who is experiencing issue like this (and maybe they’ll have something else to share and discuss).

However, if you are not comfortable that way, you can create a support ticket attached a link to this thread and provide more details about your issue and troubleshooting (including the details of a specific model of your AP and how to configure the setting would be great).

I appreciate it a lot. Thank you @Shinji !

sjthespian · May 29, 2026, 1:00am

Has there been any progress with this? I’m still seeing both of my devices losing wifi once or twice a week, and never at the same time. It’s getting annoying, I had to add a remote power device on the outdoor one as it isn’t easy to get to where it is plugged in order to reset it.

Tai_AirGradient · May 29, 2026, 12:48pm

Hi @sjthespian thank you for your following up, and I am genuinely sorry that I didn’t give you an update. We have a few revisions of the firmware after v3.6.2 (but we haven’t released it globally to all users). Could you please contact us via our support page https://www.airgradient.com/support/ and let us know your Place ID of the AirGradient Dashboard? We can provide you with different firmware versions so you can try and see if the issue is gone after changing the firmware.

For your case, the white LED could indicate that it fails to post the data to our server. Could you please check on your Home Assistant (or other local-network platforms) if it also stops getting the data from the AirGradient monitors?

The ideal way is to collect the log via Online Debug | AirGradient Knowledge Base to diagnose the issue, but I understand that it could be a bit tricky if the issue occurs randomly (which means the monitor has to connect its USB to the logger (a PC) for the whole time). So my suggestion for a quick troubleshooting we can try is to perform a clean reflash of the firmware (checking the ‘Erase device’ box during the process). Please refer to: AirGradient Monitor Firmware Updates | AirGradient Knowledge Base

Additionally, since you have Wi-Fi and Zigbee coexisting. It’s also worth checking if your 2.4GHz Wi-Fi channel overlaps with the Zigbee radio.