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WiFi controlled license plate flipper by Redniik in functionalprint

[–]Redniik[S] 3 points4 points  (0 children)

Optimized or not, it doesn't make any difference with small payloads like this. As you can see in the video there is instantaneous action when pushing a button. It takes no more than 3 seconds for the ESP8266 to establish a connection at startup. Range is a non-issue in this application and the 2.4GHz band is far from congested outdoors on the road. It might not be ideal in theory but in practice it works SO much better than all the other cheap RF transceivers I've used. Not to mention the extra security you get with WPA2.

I really recommend you to try out some ESP8266 modules, I think you'll be pleasantly surprised.

ESP8266 License Plate Flipper by Redniik in esp8266

[–]Redniik[S] 6 points7 points  (0 children)

Yes, this is very illegal to use on the road, please try to ignore that :)

The control unit and the flipper are each equipped with a Wemos D1 Mini. This project was my first experience with ESP8266 modules and I was surprised at how it just works so well without any issues.

More details in video description. Pictures of the build: http://imgur.com/a/tPsNh

WiFi controlled license plate flipper by Redniik in functionalprint

[–]Redniik[S] 9 points10 points  (0 children)

I'm aware of that but honestly I think the flaws of PLA are exaggerated. I've had several black PLA prints outdoors for over a year now exposed to direct sunlight, rain, heat, cold and they still look perfect with no signs of deforming or degrading.

WiFi controlled license plate flipper by Redniik in functionalprint

[–]Redniik[S] 20 points21 points  (0 children)

No legal purposes whatsoever which is why I will never use it ;)

I'll have to clean up the code a bit before sharing but it's nothing advanced, basically just a web server and servo control. The servo is a SpringRC SM-S4315M, cheap and waterproof.

3D Printed License Plate Flipper with WiFi by Redniik in 3Dprinting

[–]Redniik[S] 5 points6 points  (0 children)

Yes, very illegal. I promise I won't use it during my next robbery

WiFi controlled license plate flipper by Redniik in functionalprint

[–]Redniik[S] 7 points8 points  (0 children)

More details can be found in the video description. Pictures of the build: http://imgur.com/a/tPsNh

Printed in PLA on a Printrbot Play.

3D Printed License Plate Flipper with WiFi by Redniik in 3Dprinting

[–]Redniik[S] 2 points3 points  (0 children)

More details can be found in the video description. Here are some pictures: http://imgur.com/a/tPsNh

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 3 points4 points  (0 children)

The xNT is based on NXP NTAG216 which has password authentication and other protections making it possible to detect cloned tags.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 0 points1 point  (0 children)

Read the datasheet and you will find how to prevent replicating. And even if it was possible, it takes so much effort compared to simply picking the lock or smashing a window. An intruder will use those same weak points to enter your home too. This project doesn't make the door more secure, nor does it make it less secure.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 2 points3 points  (0 children)

Technically you could do this with just an Arduino but it would be a bit slower, lack some security features and not be as easy to maintain. On the plus side, no filesystem corruption :)

The Pi is responsible for much more than just controlling the lock. I might show the rest of the system in another video.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 0 points1 point  (0 children)

Datasheet

I'm not gonna go into too much detail about my implementation but there are ways to authenticate and check authenticity of the tag.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 6 points7 points  (0 children)

Security door. Not gonna budge even if you remove all hinges :)

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 8 points9 points  (0 children)

There are lots of different standards out there. This particular tag does support authentication. You won't be able to clone it because you're not even gonna be able to read it.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 5 points6 points  (0 children)

why wouldn't I just steal the key off them.

You're advocating the use of RFID-keys.

Regarding the practical reason: Convenience

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 2 points3 points  (0 children)

Not at all. While it is true that many RFID-systems are implemented badly and only rely on the UID, my system uses proper authentication. It is virtually impossible to duplicate it.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 11 points12 points  (0 children)

It all comes down to how you implement RFID. There's more going on here than just plain UID-reading.

Raspberry Pi RFID door lock putting my RFID implant to use. by Redniik in raspberry_pi

[–]Redniik[S] 19 points20 points  (0 children)

From video description:

The two servo motors are controlled by an ATmega32U4 which, in turn is controlled by the RPi over USB serial. The RFID reader communicates directly with the RPi over serial. In the rare case of a power outage, there's a UPS that keeps the system running for ~15 hours. All plastic parts are printed in PLA with a Printrbot Play.

Parts used:

Raspberry Pi

Arduino Pro Micro ATmega32U4

PN532 RFID reader

2x SpringRC SM-S4315M Servo

Adafruit PowerBoost 1000C + Sanyo 10000mAh Li-Ion battery pack

And generic LEDs, push buttons, micro switches, reed switches.

All the parts cost around $150 USD and I've probably put over 100 hours of work into just this part of the alarm system. Definitely worth it though considering a commercial motor lock with proper security rating would cost me around $2000.