UCTRONICSfor Raspberry Pi Zero Ethernet and Power Micro USB Ethernet/PoE Adapter for Pi Zero W Fire TV Stick Chromecast Google Mini and More IEEE 802.3af Compliant

Product is as described and I would buy again if needed.

Does exactly what it says on the box -- powers and provides a wired connection to a Raspberry Pi Zero.

TL;DR: Power is unstable and device reboots every 2-3mins without network load.I've been building out my home automation system using microcontrollers and SBCs, and I've been looking for a way to power everything over PoE and avoid wireless. Using a $5 RPi0 + a $20 USB PoE adapter is cheaper than a wESP32 solution and gives you a lot more room for a network stack and a lot more power/versatility. Building PoE relay/sensor hubs like this seems just about perfect for me.This device saves a lot of space inside an enclosure when you don't have to make room for a PoE splitter/power supply and a USB ethernet adaptor. These things are a great idea and I'm surprised there aren't more vendors that make similar. I really wanted this to work and probably buy a bunch of em.The issue I'm having with this PoE adaptor is pretty weird tbh...I've got a fresh, working RPi0 (v1.3) running the newest RPiOS/Raspbian powered by this PoE adaptor, which is plugged into a 10/100 8port PoE+ unmanaged switch. There are no other peripherals, USB(OTG) hubs, nothing connected to the GPIO pins, or any additional draw on the power rails -- just the Pi0.The Pi0 boots without power warnings and I can ssh into it. Looking through syslog / persistent journal / dmesg, I can see the kernel (5.10) finds and brings up the eth0 interface for the RTL8152 without issue. There are no errors, warnings or any signs of a problem anywhere in the logs. Device looks fine over USB with nothing anomalous. There is no packet loss or net errors. Temps are fine (33c with sink). Core voltage is normal. So far, so good...But, after 2-3 minutes of just sitting there idle, the Pi0 loses power and goes into a reboot cycle.Here's the strange part: It only happens after the network has been idle / low utilization for 2+ mins.It will constantly reboot with an open ssh connection, but NOT if I run top or glances that generates non-ACK traffic over eth0. Also, if I constantly ping the device from another machine it never reboots / loses power. I've tested this up to 15+ hours of constant pinging, and every time the ping / traffic stops, the Pi loses power within 2-3 mins.I've enabled persistent logging and there's nothing in the logs at all to indicate what the problem might be. It's clearly an unclean shutdown with no warnings. Monitoring the voltage on the 5v USB rails just shows the power dropping out and coming back up within around ~0.75 seconds. I can run a high cpu load (stress) on the Pi, but it will always reboot unless there is ALSO a significant network load (i.e. constant pinging from another device.)I suspected a low-power-state condition. I've tried disabling automatic power management of the device via sysfs config, and using ethtool to disable EEE (Energy Efficient Ethernet) but no love. I've even tested on a different (working, unmanaged) PoE switch. Same thing. The PoE device just keeps suddenly powering off without enough network load.Now if I power the same Pi0 with a standard 1.0a PSU and use a non-PoE network switch, it stays rock solid and never generates any errors regarding the RTL8152. The device seems to work fine as a ethernet adaptor alone, but the PoE function has been completely unreliable for me.Not sure if I've got a defective unit, or if there's some design flaw at fault here. I've reached out to UCTRONICS and I'll request a replacement. I'll update my review if this gets resolved.

Contrary to other reviews, this device DOES provide both power and data simultaneously via the ethernet port to the USB connector -- POE. It works as it's advertised to work. Power can also be injected via the secondary USB port using a conventional USB brick if POE is not available. Data can still be provided via ethernet.It's a great solution for Wyze cameras that are using third party firmware for ethernet connectivity and RTSP streaming. It does NOT provide ethernet capability to stock Wyze Cam firmware, though it will still power them via POE for long distance locations.If you understand how poe works, this should work for you.Good luck with yours!

Pros: Cheap, PoE 802.3af active support, convenient packageCon #1: So far, I've only been able to see it "link" at 100Mbps on my gigabit switches. Probably not a big deal for the things it would be used on, but be aware it may not actually be gigabit-capable as advertised.Con #2: Seems to not have the "id" pin on micro-B connected for USB-OTG mode so the devices I've tried so far (tablet/phone, MiFi) that I know support OTG Ethernet don't recognize it as a device. This probably doesn't matter for a Raspberry Pi but other Android based devices need it to know to switch into OTG mode.Given how cheap I will likely keep it to toy with, it looks like the case could be popped apart and I could probably solder in a spare "proper" OTG pigtail so it can work correctly with my hotspot device for backup Internet.