125 kHz RFID
Reading 125 kHz RFID cards

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Flipper Zero allows you to read, save, and emulate 125 kHz RFID cards. A 125 kHz RFID card is a transponder that stores a unique identification number. When scanned with a reader, a 125 kHz card transmits its ID number. If the card has the supported protocol, Flipper Zero can read and save the ID number.
On this page, you will learn how to read, save and emulate 125 kHz RFID cards with your Flipper Zero.
<div class="warning flipper-callout">
    <div class="callout-header">Insert a microSD card to use all 125 kHz RFID functions</div>
    Flipper Zero stores databases on a microSD card, so update your Flipper Zero firmware with a microSD card inserted before using the 125 kHz RFID feature. For more information about the update procedure, see the <a href="https://docs.flipperzero.one/basics/firmware-update" onclick="next.router.push('https://docs.flipperzero.one/basics/firmware-update')"><u>Firmware update</u> page.  
</div>
<div class="warning flipper-callout">
    <div class="callout-header">Insert a microSD card to use all 125 kHz RFID functions</div>
    Flipper Zero stores databases on a microSD card, so update your Flipper Zero firmware with a microSD card inserted before using the 125 kHz RFID feature. For more information about the update procedure, see the <a href="https://docs.flipperzero.one/basics/firmware-update" onclick="next.router.push('https://docs.flipperzero.one/basics/firmware-update')"><u>Firmware update</u> page.  
</div>
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Reading procedure
To read and save the 125 kHz card's data, do the following:
1
Go to Main Menu -> 125 kHz RFID.
2
Press Read, then hold the card near your Flipper Zero's back.
Hold the card in the center of your Flipper Zero's back
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<div class="warning flipper-callout">
    <div class="callout-header"></div>
    Don't move the card while reading. The reading process might take up to several seconds because Flipper Zero switches codings and tries to match the card's protocol with the list of supported protocols. 
</div>
<div class="warning flipper-callout">
    <div class="callout-header"></div>
    Don't move the card while reading. The reading process might take up to several seconds because Flipper Zero switches codings and tries to match the card's protocol with the list of supported protocols. 
</div>
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While reading, Flipper Zero switches between ASK and PSK codings every three seconds to read data from the 125 kHz RFID card.
Flipper Zero switches codings every three seconds
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Once the reading is finished, review the card's data.
The captured data is displayed on the screen
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4
To save the card, go to More -> Save.
5
Name the card, then press Save.
If reading failed
The card might be using NFC technology. -> Read the card with the NFC application.

Flipper Zero switches codings every three seconds. Some cards might not be read because it might require up to 10 seconds to read data. -> Read the card with the preselected ASK or PSK coding.

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Reading with a preselected coding
Flipper Zero allows you to read 125 kHz RFID cards with the preselected ASK or PSK coding.
To read and save the 125 kHz card's data with a preselected coding, do the following:
1
Go to Main Menu -> 125 kHz RFID -> Extra Actions.
2
Select Read ASK or Read PSK.
3
Hold the card near your Flipper Zero's back.
4
After reading, go to More -> Save.
5
Name the card, then press Save.
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Emulating 125 kHz RFID cards
Flipper Zero can emulate saved 125 kHz RFID cards by doing the following:
1
Go to Main Menu -> 125 kHz RFID -> Saved.
2
Select the card you want to emulate, then press Emulate.
With Flipper Zero, you can emulate saved 125 kHz cards
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3
Hold your Flipper Zero near the reader, the device's back facing the reader.
While emulating the 125 kHz card, hold your Flipper Zero near the reader
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