🔑 iButton Keys
Connection guide for iButton keys for driver identification in the Smart IoT.
📋 Description
This accessory is used in logistics management applications where user or driver administration is required.
Rinho incorporates the iButton DS1990 from Dallas, an identifier with a unique serial number stored in its ROM memory.
🔧 Technical Specifications
| Feature | Value |
|---|---|
| Model | iButton DS1990 (Dallas) |
| Protocol | 1-Wire (One Wire) |
| Memory | ROM (read-only) |
| Unique ID | Factory serial number |
| Max. bus distance | 15 meters |
🔌 Connection
Connect to the OW0 or OW1 port of the accessory connector:
| iButton Reader | Smart IoT |
|---|---|
| DATA | OW0 or OW1 |
| GND | GND |
💡
The iButton is commonly used for driver identification.
🔑 Operation
When read by the device:
| Action | Result |
|---|---|
| First reading | Starts driver session |
| Second reading | Closes current session |
| Different ID reading | Changes driver (closes previous, opens new) |
⚠️ Installation Observations
| Aspect | Recommendation |
|---|---|
| Cable | Shielded (shield + 1 conductor) |
| Maximum distance | 15 meters |
| Reader location | Accessible to driver |
📡 Related Commands
| Command | Function |
|---|---|
| IC | Driver identification configuration |
| SS | Generate triggers for session start/end |
📊 Compatible Reports
The session ID can be included in these report formats:
| Report | Description |
|---|---|
| IB | Applied report with driver ID |
| CT | Extended report with session |
| CU | Extended report with user |
See Also
- Accessory Connectors - 1-Wire port diagram
- Temperature Sensor - Another 1-Wire accessory
- Hardware (DIP Switch) - Hardware configuration
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