Maxim 1-Wire (Dallas Semiconductor) protocol uses a single data wire plus ground for daisy-chaining DS18B20 temperature sensors, humidity sensors, and iButton authentication tokens throughout a smart home.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | VCC | Optional power supply parasitic mode | PWR |
| 2 | DATA | 1-Wire bidirectional data | BUS |
| 3 | GND | Ground | GND |
Maxim 1-Wire (Dallas Semiconductor) protocol uses a single data wire plus ground for daisy-chaining DS18B20 temperature sensors, humidity sensors, and iButton authentication tokens throughout a smart home.