RFID Reader 125 KHz / Norm EM4450

[SIIDigital]

Hello guys,

We want to implement a RFID 125 Khz Reader to our Raspberry.

We use following Hardware:
- Raspberry PI 2 (Jessie)
- RFID-Reader: RFID Reader Board 125 KHz (http://www.logingel.com/2267/1…Product/ ... ader_Board)

Especially, we want to read RFID-TAG´s with the EM4450 norm and we found the Reader mentioned above.
The electronic circuit is like this:
http://kampis-elektroecke.de/wp-content ... _Eagle.jpg

In Detail: (voltage divider included)
RFID Board | Raspberry Pi
VCC --> 5V
GND --> GND
OUT --> RX

All, should be read. We use following code:
Import time
Import serial

Tag1 = str()
PortRF = serial.Serial(`/dev/ttyAMA0`,9600)
Print “OK”
While True:
ID = “”
Read_byte = PortRF.read()
Print read_byte


However, nothing happened.
Do you have an idea why it could be? Maybe you know the RFID-Reader?

Thank you very much for your effort.

Yours sincerely,

SIIDigital

[OutoftheBOTS]

Ok I google your tag and it is the protocol that is used for animal chip in Europe see ISO 11784/11785

These RFID chips r fairly complex. They normally have a whole protcol to go through and you can't just send data like an open port.

I don't know the ISO 11784/11785 protocol but have used the Mifaire and it goes something like this. The transponder sends out a wake up call to the tag, the tags responds with it ID and they they go though an authenticate protocol back and forth and an anti collision hand shake in case there is 2 tags in the field. Tehn you can write or read from the tag.

You will need to research just how your hardware works a bit more

[SIIDigital]

Ok I google your tag and it is the protocol that is used for animal chip in Europe see ISO 11784/11785

These RFID chips r fairly complex. They normally have a whole protcol to go through and you can't just send data like an open port.

I don't know the ISO 11784/11785 protocol but have used the Mifaire and it goes something like this. The transponder sends out a wake up call to the tag, the tags responds with it ID and they they go though an authenticate protocol back and forth and an anti collision hand shake in case there is 2 tags in the field. Tehn you can write or read from the tag.

You will need to research just how your hardware works a bit more

Thank you for your input. Yes, you are right. This protocol is difficult.
We just want to read the UID of the TAGs, that would be nice. Writing is not necessary. (As easy as possible )

Hardware is the one thing. But to find the right Code for python is more difficult for us.