OpenHASP on single pair ethernet (with PoE)

[PKeller34]

I've been looking for a way to deploy OpenHASP on my PoE based infrastructure for quite a while. I looked at modifying HASwitchplate(s) to run off wired Ethernet and 47v Poe, a PoE powered OpenHASP, and full DIY. I've been barreling down the DIY path in my copious free time by adding a display to the PoE Featherwing + RP2040 stack developed by Silicognition. My wall switches are all built using the PoE Featherwing + RP2040 "Shim" and I'm very pleased with how that's working out.

I found out about a new ESP32 with single pair Ethernet (SPE) module Silicognition is contemplating that might make a PoE wired OpenHASP much more feasible. I've seen others asking about OpenHASP with wired Ethernet and PoE and wondered if this might have potential.

There are other things I had planned to use the RP2040/PoE Feather wing for that aren't OpenHASP that might work well with the SPE/PoE module. For example a PoE/Artnet LED driver to replace DMX, implementing the wall switch functions using Node Red for MCUs for easier OTA and adding features. This would simplify my overall HA system.

[bensuffolk]

I use the t3e with a custom PoE board using a W5500 SPI module and a banana pi poe module. I have that build into a small pcb that connects via the ribbon cable. The only thing is I need to modify 2 wires on the cable to get the extra IO.

[PKeller34]

Your custom board sounds just like the PoE Featherwing (only less expensive:-)). I've been successful using the T3 + Feather adapter + Adafruit Feather ethernet wing. I haven't double checked the pinouts but the PoE Featherwing might "just work" or at most need a haywire or two. I've seen lots of queries on PJRC's site about how to adapt T4 to use PoE. Nobody has mentioned a setup like the ones you use. I don't know why. What you did seems pretty straightforward. I plan to try out the T4 + feather adapter + PoE Featherwing sometime soon.

PoE aside, running OpenHASP on a Teensy would also involve a SW port. I've discussed RP2040 support in another thread but it seems clear that the community is all-in on the ESP32, which is why I'm interested in the PoE on Single Pair Ethernet module I mentioned. An OpenHASP port to that module might just involve changing a few pin assignments.

[bensuffolk]

Here is a picture of my prototype board.

This version will actually take either 12 - 18v passive PoE or the 48V proper 802.11af PoE. This is because in my earlier use cases I had them running on CCTV 12V style PoE switches, but now I tend to use real ones. So you actually don't need the majority of those components. In fact all you need is the W5500 module and the 2 resistors for the LEDs, and the PoE Module.