I would like to start a discussion on Power Over Ethernet (PoE) on Particle Mesh devices (particularly Xenon ethernet gateway).
There was some discussion in April 4 on possibly supporting PoE in the future and for now, Particle just recommends to use PoE injectors.
While checking the Ethernet FeatherWing eagle schematic, I saw there were headers anticipating PoE support
The RJ45 jack uses HY931147A but cant seem to find the exact datasheet for this. The nearest I could find was HY931147C and according to this datasheet, it has support for IEEE802.3af or up to 12.95W (worse case scenario) at the PD (powered device level).
I assume that the PoE module to be put on the Ethernet FeatherWing will output 5V, which feeds into the VUSB pin. (Side note: We probably don’t want the Ethernet FeatherWing PoE powered while troubleshooting over USB otherwise we might be seeing some magic smoke!)
Question to Particle Hardware group: What standard are the headers for the PoE module following? or are you guys developing your own 802.3af module to plug in? There are lots of IEEE802.3af PoE modules available on aliexpress, silvertel, etc. for 7USD or less, and Shenzhen PoE CCTV modules are 15-25 RMB (some with isolation too).
Question to others in the community:
Is anyone developing high power PoE devices here? I am working on 802.3bt 71W or higher devices targeted at “digital ceiling” application, and micro compressors for lab controlled refrigeration. It would be nice to consolidate efforts if there might be others along this path.