I've got 2 125KHz reader modules (HZ-1050) & (RDM6300). I can easily read tags with them. Both have external antennas which are just coils.
My goal is to read rfid tags which is being used for fuel automation.
Like these ones.
Main question is;
When i tried my 2 reader modules to read from a car's vehicle tags on the fuel inlet, i couldn't read anything.
Is this just because the vehicle tag antenna is connected to an active RF module and authentication is blocking to communicate
or
"Even if it would be a passive tag" Is it because i haven't got enough power from the amplifier of the module. What should i do to read this huge antenned tag?
Today i've found a different antenna which is used in petrol station pump to read fuel tank id tags. When i look to the coil i've found 2 identical capacitors series to the coil.
antennacable_1 -----------------| |--------| |----------(Coil)--------------------- antennacable_2
it says "330j COG 50" on the capacitors.
I cannot use this antenna with my reader modules. I guess it simply just dont fit inductance value to oscillate but line capacitors? It tells me "You need more power and tuning"