From 31e8f868915c2256f69acc750ac364f4e2b39818 Mon Sep 17 00:00:00 2001 From: Ondrej Mikle Date: Thu, 26 Jul 2018 02:32:11 +0200 Subject: [PATCH] Installation photos --- README.md | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/README.md b/README.md index 06e7cf7..723f5d7 100644 --- a/README.md +++ b/README.md @@ -113,6 +113,22 @@ If you have `pcscd` running, it will take over the reader and you can't use it. Similarly, you have to blacklist `pn533` and `pn533_usb` kernel modules (usually in a file like `/etc/modprobe.d/blacklist.conf`). +## Photo of an actual installation + +![Raspberry with stepup](https://brmlab.cz/_media/project/brmdoor/brmlab_03.jpg?cache=&w=900&h=600&tok=bcf9ca) + +![Connection to PN532 reader](https://brmlab.cz/_media/project/brmdoor/brmlab_04.jpg?cache=&w=900&h=600&tok=575eb2) + +Security note: it's better to have reader behind door, but this door is metal (thus external or wormhole antenna needed). +Even though the reader is not connected directly to *open* PIN which could be triggered by applying power to it. + +There are two ways to do it: + +- Separate antenna connected to [external antenna PINs provided by Adafruit PN532 board](https://learn.adafruit.com/adafruit-pn532-rfid-nfc/downloads) + Antenna is quite difficult to tune (requires right LC circuit with proper coils and capacitors). +- [Wormhole antenna](https://i.imgur.com/fclA2b2.jpg) - two coils connected with wire. It generally works, but is not + very reliable. + ## Startup with systemd and GNU screen Example of startup unit for systemd, put in `/etc/systemd/system/brmdoor.service` and this repo cloned in `/root/brmdoor_libnfc`: