Huge security vulnerability

My sensor is showing and updating on the map, and I also have a network PurpleAir-xxxx on my network list. I can connect to the PurpleAir network, and get the PurpleAir config screen which says “WiFi Connected Looking good!”

I’m not using subnet. My network to which the sensor is successfully connected has internet access, which is why the sensor shows on the map. (And the map shows signal strength “good”)

Anyone in range, therefore, can connect to my sensor and tamper with the settings, easily knocking it offline, for example.

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Hello Michael,

The PurpleAir-**** network should become unavailable after the device has bee configured to WiFi. Feel free to email us with your device ID so we can investigate further.

Thank you

It is behaving correctly now. Thank you.

I am searching the Community for answers to problems I am having setting up a new PA II. I am not sure if this thread has anything to do with the issue but I read that “the PA network should become unavailable after the device has been configured to WiFi.”

Both screenshots show that my WiFi and the PA II “Network” are both active, and I assume are connected. However, I have not received any data from the outdoor unit.

My question is whether the “PurpleAir Network” is “unavailable” as you wrote? If I click on the PA WiFi it is labeled “unsecured network” but I still see no data, so I revert back to my secure network “Tivoli-V”. I am not sure if this could be a reason I am not receiving any data.


Hello Ron,

Welcome to the PurpleAir community! I’m sorry that you’re having issues connecting to the Wi-Fi. Once you have connected your sensor to Wi-Fi, your PurpleAir**** network will no longer appear in your list of available networks.

If you have an Eero router, I would recommend reviewing this article: Trouble connecting with an Eero router

If you are not using an Eero router, are there any security settings that could affect the sensor’s ability to connect?

If you still have issues, please contact our support team at with your device ID number.