@MrStein Thank You I will check Elecrow sporadically.
Unfortunately Keyduino was not an option for me, since I use Arduino Megas due to extra pins and memory with Ethernet shields and PN532 Readers communicating over Serial placed in exterior as far as 10 meters from Arduinos. Arduinos are in interior due to reprogramming and temperature/moisture conditions.

Guys, do You know where I can get the small antennas shipped with keyduino ?
It is my last hope since my existing system (5 DIY door locks) have readers
placed in exterior in a case (0.5 mm thick) and I get no readings at all.
My 2016 rings only work when I touch the antenna on the reader at specific spot.

I agree that Transparent/Black is too contrasting.
Transparent/Transparent wouldn't allow to distinguish chips without taking off the ring to check the laser branding..
so Transparent/White is the option to go for IMHO..

Type Signature, size 60. I used serial communication. Never got a single reading.
I just got elechouse NFC module V3 clone, I get a reading sporadicaly at the edge,
but I guess the antenna shape is not suitable for the ring or there is low power.
I wanted to build four DIY NFC locks into my house so the ring will be the only key,
so I have to never carry a regular key.. Ever..
However I guess I will have to wait until Mr.Stones modules are available for purchase
or check out the Elechouse original V3.
I want 2 build the antenna into the square fixed handle so just grab it and the deadbolt
will be pushed out instantly (standard european door) by a car powerdoor lock,
but I realize there is no reader/antenna available yet
that will provide acceptable readings.

Grove NFC with external antenna doesn't work at all.

I didn't find a topic related to working/not working NFC reader modules.

Hi guys, when do U expect these boards 2B available for purchase ?
Thanx.