This page describes how to control NFC on a Cuttlefish device using the Cuttlefish NFC feature. NFC is supported on Cuttlefish devices running Android 15 or higher.
Use Casimir
The Cuttlefish NFC feature uses Casimir, an external NFC device simulation tool,
which supports injecting APDU bytes for host card emulation. Casimir is
implemented in
/platform/system/nfc/tools/casimir/.
When launching Cuttlefish, Casimir is also launched by default. To
control Casimir, use the CasimirControlService service.
CasimirControlService
You can use the CasimirControlService service through the REST API or the
command line interface. For details, see
Cuttlefish: Environment Control.
The following table describes the method in CasimirControlService. For
more information, see
casimir_control.proto.
| Method | Description |
|---|---|
SendApdu
|
Sends APDU bytes (hex strings) with NFC-A and ISO-DEP. The response is returned as hex strings. |
The following is an example command and a simplified response for sending two
APDU bytes, [0x00, 0x11, 0x22] and [0x33, 0x44, 0x55].
Command
cvd env call CasimirControlService SendApdu '{apdu_hex_strings: ["001122", "334455"]}'Simplified response
Rpc succeeded with OK status { "responseHexStrings": [ "9000", "9000", ] }