https://github.com/araobp/arduino-nfc-tag
Arduino with dynamic NFC tag
https://github.com/araobp/arduino-nfc-tag
arduino-sketch dynamic-nfc-tag
Last synced: 5 months ago
JSON representation
Arduino with dynamic NFC tag
- Host: GitHub
- URL: https://github.com/araobp/arduino-nfc-tag
- Owner: araobp
- License: apache-2.0
- Created: 2019-06-13T07:13:15.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2019-06-15T23:31:10.000Z (about 6 years ago)
- Last Synced: 2024-12-23T00:02:59.506Z (6 months ago)
- Topics: arduino-sketch, dynamic-nfc-tag
- Language: C++
- Homepage:
- Size: 7.41 MB
- Stars: 7
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Arduino with dynamic NFC tag
## Parts
- RasPi 3
- Arduino UNO
- [ANT7-T-ST25DV04K (dynamic NFC tag)](https://www.st.com/en/evaluation-tools/ant7-t-st25dv04k.html)
## Schematic of Dynamic NFC tag Arduino shield
This is a schematic of Arduino shield with ANT7-T-ST25DV04K. Its pin assignment is same as that of STMicro's expansion board "X-NUCLEO-NFC04A1".
==> [schematic](./kicad)
Note: the shield is powered by 3V3 pin on Arduino UNO. Although Arduino UNO is a 5V system, the circuit works.
### Attaching the nfc tag module to the shield
The module's RF pin (GPO) plays an important role in this project to avoid EEPROM wearing. Arduino can sense that a smart phone is in its proximity by checking voltage of GPO.
I have come up with the following method: connect a pin socket to RF pin of the module with a wire.
## Sample app: "Digital photo frame with dynamic NFC tag"
Architecture
```
[Chrome]----socket----[webapp.js]----USB----[Arduino]
```
==> [webapp.js](./webapp)
[Step 0] Connect the device (Arduino with the shield) to RasPi with an USB cable.
[Step 1] Start webapp.js
```
$ node webapp.js
```
[Step 2] Access "http://localhost:18080" with Chrome browser on RasPi to start the digial photo frame.
[Step 3] Hold a NFC-capable smart phone over the NFC tag. It should start a browser automatically to show a Wikipedia URL with the image.
## Explanation on NDEF
### NDEF records on ST25DV04K' EEPROM
The following is an example of a record in Area 1 on the EEPROM embedded in ST25DV04K:
```
ST25 system config: 88 3 1 0 C 7 0 E C F 0 0 0 0 7 0 0 0 0 0 7F 0 3 24 AF F 62 2 0 24 2 E0
ST25 password: 0 0 0 0 0 0 0 0
ST25 dynamic config: 88 FF 8 0 1 0 0 0
NDEF CC file: E1 40 40 0
NDEF message type: 3
NDEF message length: 3A
NDEF header: D1 1 36 55
NDEF payload length: 55
NDEF Identifier code: 4
NDEF URI field:
github.com/araobp/pic16f1-mcu/bl
ob/master/BLINKERS.md
```
### NDEF format for URI(HTTPS)
```
+---------------+
| 0xE1 | CC File 4 bytes length
+---------------+
| 0x40 | CC File
+---------------+
| 0x40 | CC File
+---------------+
| 0x00 | CC File
+---------------+
| 0x03 | Meaning that this tag contains NDEF records.
+---------------+
|Payload len + 4| NDEF Head 4 bytes (short record, no ID)
+---------------+
|1|1|0|1|0|0|0|1| MB(1), ME(1), CF(0), SR(1), IL(0), TNF(001)
+---------------+
| 0x01 | Type length
+---------------+
|Payload length |
+---------------+
| 0x55 ('U') | Type: URI
+---------------+
| 0x04 | Identifier code: HTTPS
+---------------+
| URL | Payload
| : |
| : |
+---------------+
```