Which SoC for RFID Reader? Raspberry Pi Zero W ?

[nelsonic]

The idea is to use a Raspberry Pi (or Arduino) to power the RFID Reader for the Door(s).

The Raspberry Pi Zero W has the following advantages:

• Cheaper (£9.16 per board) ... see screenshot below.
• Lower power consumption (can be "fed" from the 2.1A USB Wall Outlet)

https://thepihut.com/products/raspberry-pi-zero-w

Power Consumption Comparison

http://raspi.tv/2017/how-much-power-does-pi-zero-w-use

The "official" power consumption figures are a bit less informative: https://www.raspberrypi.org/help/faqs/#powerReqs

RFID Reader Chip

https://www.aliexpress.com/item/RFID-RC522-Module-Card-Read-Antenna-RF-Reader-IC-Card-Proximity-Sensor-FZ0565/32397071273.html

[nelsonic]

Tried to order it ... but got: "Sorry, this order is failed due to internet connection problems."

Might try again later ... 🙄

[nelsonic]

For the time being @th0mas is using the PN532 https://github.com/dwyl/smart-home-security-system/issues/1#issuecomment-651036343 He has made great progress with it: https://github.com/dwyl/smart-home-security-system/blob/master/NFC_Reader.md

When we "deploy" the system, we will need a more robust (outdoor) solution.

Obviously I find an e-commerce site called "Bang Good" to be a bit dubious ... 🙄 But this appears to be the most reasonably priced IP65 Waterproof NFC/RFID Reader I can find: https://www.banggood.com/Long-Range-RFID-Card-Reader-13_56MHZ125KHZ-Proximity-Card-Access-Control-Reader-Wiegand34-IP65-Waterproof-NFC-Reader-p-1534554.html

Spec:

Proximity 125KHz /13.56MHz Card Reader Read Range: Up to 10CM(125KHz)/5CM(13.56MHz) 34bit Wiegand code output External LED Control External Buzzer Control Indoor / Outdoor Operation Solid Epoxy Potted Waterproof IP65 Reverse Polarity Protection

Read Range Up to 5 - 10CM Reading Time (Card) <=300ms Power / Current DC 6-14V / Max.70mA Input Port 2ea (External LED Control, External Buzzer Control) Output Format 34bit Wiegand (default) LED Indicator 2 Color LED Indicators(Red and Green) Beeper : Yes Operating Temperature -20° to +65°C Operating Humidity 10% to 90% relative humidity non-condensing Color : Black Material ABS+PC with texture Dimension(W x H x T)mm : 1167517.3 Waterproof level : IP65

Package includeds :

1 x Long Range RFID Card Reader

it appears to be possible to use this with a Raspberry Pi: https://raspberrypi.stackexchange.com/questions/56706/raspberry-pi-as-wiegand-device-output-wiegand-to-receiver

[th0mas]

We would have to write our own NFC receiver library to use that with our System, as there doesn't seem to be any existing Elixir/(any?) libraries. My preference would be using a reader with the PN532 chip in it as its so common, and we can lean on an existing implementation.

A starter on the reading NFC chips using Wiegand: https://stackoverflow.com/questions/35491151/what-kind-of-data-can-a-wiegand-26-reader-read-from-an-nfc-card

[nelsonic]

@th0mas good point. 100% onboard with using a PN532-based reader that already has an Elixir library! ✅

We can revisit Wiegand in the future: https://www.aliexpress.com/item/4000459364534.html

[Uzzi]

I've https://www.amazon.it/gp/product/B07DK9R7K4/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1

Can you share me exact level shifter model? Can you share me pins connections scheme Raspberry---->level shifter model------>Reader?

Thank you

[nelsonic]

Wish we could help you @Uzzi ... sadly we don't have the answer. 😞 Best of luck on your quest. 🔍 If you find the answer, please share. 💭

[Uzzi]

Hi Could you help me about https://wiki.geekworm.com/Raspberry_Pi_DIDO_Board and https://ae01.alicdn.com/kf/H1af968b7b7ec4bce83c5e4152c6be2b2z.jpg connections schema diagram? Thank you

[nelsonic]

@Uzzi wish we could help you but we are not the experts on this. please consider opening a question on: https://electronics.stackexchange.com