Welcome to nfc-desfire-card-service 👋


> NFC DESFire card scanner service

$3

Install

``bash
sudo npm_config_user=root npm install -g nfc-desfire-card-service
`

$3

Create the file /etc/nfc-desfire-card-service/desfire-credentials.json prior to running this.

`bash
sudo nfc-desfire-card-service --systemd=install
`

This will also create a new nfc-desfire-card Linux group, and add the current user to it.

$3

`bash
sudo nfc-desfire-card-service --systemd=uninstall
`

This will also remove the nfc-desfire-card Linux group, and remove the current user from it.

Usage

`bash
nfc-desfire-card-service [--cache] [--enabled] [--poll] [--device="devicename"] [--socket="socketname"] [--credentials="filename"]

`
`bash
NFC_DESFIRE_CARD_SERVICE_CONFIG="path" nfc-desfire-card-service
`

$3

`bash
nfc-desfire-card-service --preview
`

Options (cli / nfc-desfire-card-service.json)

##### --cache / { "service": { "useCache": true } }

Enabled internal UID/data caching. This saves the tag having to be opened and read for previously seen tags, but means that changes to the card data will not be considered.

##### --enabled / { "service": { "startEnabled": true } }

Starts the service in scanning mode immediately rather than waiting for a client to instruct the service to start scanning.

##### --poll / { "nfc": { "pollForDevices": true } }

Causes the service to wait for devices to become available rather than exiting if a device is not present.

The service also waits for further devices when the present device is lost, however in actuality the underlying LibNFC/Freefare process generally segfaults and aborts the service.

##### --device="devicename" / { "nfc": { "device": "devicename" } }

Specifies the name of the device to use. Other available devices are ignored.

##### --credentials="filename"

The path and filename of the credentials file in JSON format. If this is not specified, the file desfire-credentials.json` in the config directory is used.

Author

👤 Pete Morris

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