Low Frequency RFID Reader (125-134.2 kHZ) range

Other Hardware General Electronics
1

Hi all, I want to rfid system for my dog. I tried to research , I found RDM6300.It is easy to code with arduino but my problem is rfid read range is too low.I need at least (35-50) cm.
How can i increase read range with antenna ( i didn't work with antenna and I didn't design antenna before). My second problem is can RDM6300 read 134.2 Khz ? RDM6300 is a very cheap that's why i want to work with.
My second rfid reader is this https://www.aliexpress.com/item/32849928970.html?src=google&aff_fcid=0a6649b0395848e2b637f941a883b8e4-1632127045230-00072-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=0a6649b0395848e2b637f941a883b8e4-1632127045230-00072-UneMJZVf&terminal_id=430eda600d8d43ea8b0489cad32b3a1d .This is quite expensive for me. But it says with 240x380mm antenna you can read Diameter 30mm standard ear tag from 50cm.Is it really possible ? Can lf rfid read from 50cm. If you guys know better rfid reader or antenna please tell me . I need help. Thank you .

2

Hi,
I'm also need help with this module, if you found some info or codes for the Arduino it's can help too,
Thanks in advance

4

I don't know about increasing range. I can telly you about something with codes.Only you have to do is comunicate them over UART. I use this module with micropython so I will try to convert some but I don't really know arduino coding.

#define RX 0
#define TX 1
void setup() {
  Serial.begin(9600);
}
void loop() {
String data = Serial.readString();
//I am writing this line in micropython if data !=None:
// I am writing this line in myicropython data=data.decode('utf-8')
serial.println(data)

That's it. You have to figure it out utf-8 line.

5

The original post mentions 2 different modules. Which module are you using?

6

You simply need a larger antenna coil - the range is related to the diameter of the coil. However as coils get larger they get less sensitive too, so there's a limit. With near-field devices like RFID the sensitivity falls off as the cube of distance once beyond the dimensions of the coil, which is why the coil size is the important factor.

Any coil will need to be precisely tuned with capacitor(s) to match the frequency in use, note, as RFID sensing uses a tuned resonant LC circuit. Tuning is also affected by nearby metal objects.

7

I am not using this module anymore. I had 10 cm read range with that module. Here arduinoforum this may help.

8

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