PetChipFlip

PetChipFlip is a Flipper Zero external app focused on reading animal microchips. It uses Flipper's LF RFID protocol worker directly and scans in ASK-only mode, which is the path Flipper's own animal-chip workflow recommends for FDX-B chips.

What it reads

• FDX-B / ISO animal microchips, including the common 15-digit IDs.
• FDX-A chips supported by the installed firmware LF RFID stack.
• Other LF RFID tags are detected but shown as non-animal reads.

Flipper Zero can read many 134.2 kHz animal chips with its 125 kHz LF antenna, but range is short. Expect close contact, slow movement, and repeated holds. The app is optimized for modern/common FDX-B ISO-style pet chips by staying in ASK-only read mode and using the firmware's FDX-B decoder path first, instead of spending time cycling through unrelated PSK workflows.

Build

cd .\flipper_app\applications_user\pet_chip_flip
ufbt

The built FAP will be under the app's dist directory.

Launch When A Flipper Is Plugged In

.\flipper_app\scripts\launch.ps1

If auto-detection picks the wrong serial port:

.\flipper_app\scripts\launch.ps1 -Port COM4

Deploy Into A Firmware Checkout

.\flipper_app\scripts\deploy_to_firmware.ps1 -FirmwarePath C:\path\to\unleashed-firmware

Then build from that checkout with:

.\fbt fap_pet_chip_flip

On-Device Use

• Hold the back of the Flipper flat against the pet over the chip area.
• Hold each position for at least 3 seconds.
• Move in small 10 mm steps around the neck/shoulder area.
• Rotate the Flipper 90 degrees and repeat if the first pass misses.
• The app keeps the display backlight on while it is open and blinks cyan while scanning.
• The scan screen diagram shows the back of the Flipper; place that back face flat to the skin and center the marked coil zone over the suspected chip.
• Any decoded LF result plays a short beep.
• Press OK to keep/restart scanning, Right to save the last result, and Back to exit.

Saved reads are written to /ext/apps_data/pet_chip_flip/last_read.txt.

There is no exposed LF RFID gain control in the external-app SDK used here. The best practical reliability improvements are continuous ASK scanning, contact pressure, slow 10 mm movements, and rotating the Flipper after a missed pass.