// Smart Home IoT Connectors

1-Wire Temperature Sensor

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.

// Specifications

Standard

Maxim 1-Wire protocol

Wires

1 data plus ground or parasitic power

Speed

16.3 kbps standard or 142 kbps overdrive

Connector

RJ11 2-pin terminal or 3-pin header

Use Case

DS18B20 temperature chains smart home monitoring

Topology

Multi-drop daisy chain up to 100 sensors

// Pin Reference Table

Pin	Name	Function	Type
1	VCC	Optional power supply parasitic mode	PWR
2	DATA	1-Wire bidirectional data	BUS
3	GND	Ground	GND