Video of how things are supposed to be setup. It go over the board layout, and how to get everything simply going in homeassistant.
If you want a more in depth video I can make another going over the process of making your own code work, to name the readers, and change LED setups but that is a bit longer and more involved.
Wow, thanks a LOT. This is really helpful.
Let me know if you run into any issues.
What information do we need from Elechouse? They emailed me back
I emailed this this but havenāt gotten a reply yet. I also did order one of each readers so that I could just figure it out my self.
I designed an NFC reader project (you can see here GitHub - benbeezy/DTcommunityWIFIreader) I am currently using your v3 NFC reader and it works fine but some people want better read range, so I am looking at using this module PN532 NFC RFID Module w/ External Antenna - updated version - ELECHOUSE But the product page has no pinouts on the board. I assume they are on the back, is there any way I can get a picture of the back so that I can finish designing the board footprint for use in EasyEDA? I was also going to make it compatible with this reader you have PN532 NFC Evolution V1 - ELECHOUSE but I have the exact oposite issue, in that I can reader what the pins do but I donāt have a main board dimensions DWG file. So I am not sure how far apart the i2c pins are from the others. Also I am pretty sure I can read all the pinouts on this board, but a higher res picture would be awesome! All of this will be pushed into the repo and posted to the EasyEDA community library so others can design boards that interface with your boards also. Thank you and let me know if you need any more info from me, I look forward to hearing back, hopefully with better pictures and dimension files.
I sent them the email. Hopefully they will send us all sorts of helpful info
Not helpful:
" V3 is fake board in the market now because we already stopped it 5yr ago.
You could try our V4 and check if it works well for you."
Yeah I figured. I should have them here in a few weeks (shipping from china) then I can finalize new boards and get the fabbed. Then tested. But on looking at the initial spec it seems like weāll have a much better range.
i bought the v4 and the pn7150 board aswell. But they have some shipping/processing troubles due to again covid lockdowns 
The pn7150 wonāt work with the current software stack. Esp-home doesnāt have a library for it. That is why I stayed away from it. The 4 options mentioned above to have working libraries for esp-home. Iād love to see a working pn7150 in esp-home, but Iām just not sure what it takes to create new libraries into it.
They must be looking at the messages at least a little bit because the evolution v1 now has DWG files link
Iām impressed they actually added it
still no pinout of the other board, but hopefully itās in the works?
If you are referring to option 2 then maybe we can skip that one because the range is less than the v4
I have option 1,3,4 on the board now. We can skip 2 (I assume the i2c pins are the same)
Perfect! Iām excited to see how it turns out! What would you think about making a LED ring part of the standard design and adjust the code so the light spins clockwise with each scan? An aesthetic piece to stand out from the other Home Assistant readers. It would be cool to put it where the antenna is but that would interfere with the range (not including the Evolution v1 since the antenna is massive). I am a huge fan of aesthetics but I understand it isnāt important so no need to alter the design for LEDās. Just a fun idea 
My idea was to make it as small as possible, thatās the only reason I havenāt added a bunch of stuff to the board. That was the idea behind the extra RGB headers. That way you can put the lights wherever you want (even on top of the ESP or the reader)
Here is the current design that works with most of the readers
As a side project I might also make it fit a arduino pro micro so that you can use the board as a generic USB scanner that emulates a keyboard. But that might be a branch. Iām not sure how much this board should be a āDo it allā board. An arduino keyboard scanner could be made much smaller.
Good call. I wasnāt thinking too much about size. How does one go about shorting the LED bridge? (Sorry Iām new to all of this) I like the idea of keeping this design simple and then creating a 2nd design with an arduino for the USB scanner. Iāll be happy with whatever you decide! You are doing an amazing job!
This is how they work. you just put a bit of solder connecting the 2 sides of the bridge.
