Post by @jadyn@chaos.social

In case you don't watch a certain Guy's videos about Ansible and networking hardware, here is what Ubiquity is apparently up to these days...
They released a PoE powered air quality and 'vape detection'??? sensor. It has an LED ring, looks quite cute and supposedly only works with Unifi Protect. But what's inside, what's actually measured, is it spying? Let's poke at it and find out - a slop-free, as everything I do, thread

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Screenshot of the Ubiquiti online store. A 3D model of the sensor is shown next to the price (89€ netto) an other information. (https://eu.store.ui.com/eu/en/category/physical-security-sensors-alarms/products/up-airquality)

Foto of the actual device on a gray desk mat. It's glowing orange around the bottom. The grating for the sensor is pointing towards the camera. A one of the small holes is actually an LED glowing white. A white network cable is connected on the left.

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Jadyn - 🖨️ empress - ☎ 7889

@jadyn@chaos.social 2 hr. ago

As usual the screws hide under the sticky feet, a bit of isopropyl alcohol will get them right of. You have to be quite careful when pulling the cover off as the sensors cable is quite short. The sensor is a Sensiron SEN66, according to the data sheet it measures these things: PM1, PM2.5, PM4, PM10, T, RH, VOC Index, NOx Index, CO2.
This seems to be the only sensor in there. - More on the measurements later

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The bottom of the device, the feet are removed. You can see 4 screws around the permeierter, some black residue from the glue. The serial number is censored. The Ethernet port is visible.

Upper shell, you can see some thermal paste on a metal plate in the left half. There is a small black thing on the left, this is the light-channel for the LED thats seen poking through the grating. The right half is completely occupied by the sensor module.

Sensor module, Sensiron SEN66. It has a cable connected. The serial number is censored.

Jadyn - 🖨️ empress - ☎ 7889

@jadyn@chaos.social 1 hr. ago

Pulling apart the boards we'll find the Ethernet passives on the bottom, the microcontroller and PoE circuit on the top. The top board also connects to the LED ring, which seems to be a flex PCB with a ferrite and some capacitors on the cable itself. We also find the ESP32, it's external PSRAM, Flash and Ethernet PHY here.
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