LoveRPi Professional PoE HAT with PWM Fan Controller for Raspberry Pi 4

Great POE HAT. Had older version without PWM before but was always annoyed by the loud fan. Then I saw this and it solved the problem. It works with 5V PWM Noctua fan and you can set up service to manage fan via PWM.Contacted support team to ask about compatibility and they even shared the script to run the fan.Finally somebody solved the problem - running Pi on POE and controlling fan with PWM in one HAT

I have been very happy with the compact form factor of this PoE hat for the PI4 that I am using until...the first one died..I replaced it.Now 4 more have died (I have a case with 8 x PI4).It's not fun anymore I have to say.

This has become my new favorite POE hat for the Pi. It does not interfere much with the GPIO access (by their nature all POE hats will interfere somewhat with the GPIO header). The only thing that would make this even better would be making it a full-blown Pi UPS with a JST connector for a LiPo battery, a charging circuit for that battery, a buck/ boost converter, and some signals to the Pi to shut down when the battery is depleted.

PoE+ Hat, I'm using with a Raspberry Pi 4. Straightforward installation: push down the Hat onto the Rpi4 which connects to the 4 PoE pins and 6 GPIO pins on the Rpi4. Very low-profile, height wise sits flush with Rpi's connectors. Plenty of room to attach a fan above. Uses 2.26W at idle from PoE+ port, as reported by my Unifi switch. I'm using the Rpi4 headless, so I only saw it use up to 4.65W under load. If you attach USB devices and use it as a desktop, it will likely use more power.I'm using a Noctua 5V PWM fan 40x10 (4-pin). Depending on your case's height, you may be able to fit the 40x20 which is preferred for greater airflow at the same noise level.(-1 star) By default, the fan runs without PWM, so runs at 100%. There's no instructions here on Amazon or on the manufacturer's website on how to control the fan via the Hat. I reached out to LoveRPi customer support via their chat, and the CS agent pointed me to a GitHub repo (on LoveRPi account) with a script to control the fan. The daemon then can be configured and run to control PWM fan speed.The fan script (currently) has no docs so it took a few mins to figure out which libs were needed for it to run, as well as tweak the fan curve. It currently shuts off the fan once the CPU reaches 38C, which I think is too aggressive. I want to at least keep the fan running at low speeds to cool the PoE Hat. Running at 20% fan speed from 30C - 44C was perfect for me, plenty cooling and little to no fan noise. I didn't subtract a star for this, but if you're going to advertise PWM fan control, at least have documentation on how to use it!