# DS18B20 Temperature Sensor Setup

## Wiring

All DS18B20 sensors share a single 1-Wire bus.

ESP32:

    GPIO4 = DATA
    3.3V  = VCC
    GND   = GND

Required pullup:

    4.7k resistor between DATA and 3.3V

Example:

    3.3V -----+---------------- Sensor Red
              |
             4.7k
              |
    GPIO4 ----+---------------- Sensor Yellow

    GND ----------------------- Sensor Black

## Multiple Sensors

All sensors share the same bus:

    DATA
    VCC
    GND

Only one 4.7k pullup resistor is required.

## Scan

    scan temps

Example output:

    DS18B20 Sensors Found:
    1) 28:7D:56:25:00:00:00:34

## Assign

    assign temp 1 1
    save