7Semi DS2482 Arduino Library

Arduino driver for the Maxim DS2482 I2C to 1-Wire bridge.

The DS2482 acts as a hardware interface between an I2C master and 1-Wire devices, enabling reliable communication with sensors like DS18B20 temperature sensors and other 1-Wire peripherals.

Features

• I2C to 1-Wire bridge communication

• 1-Wire reset and presence detection

• Single byte read/write operations

• Multi-byte read/write support

• ROM commands:

  • Match ROM
  • Skip ROM

• Device discovery using ROM search

• Supports multiple 1-Wire devices on same bus

• CRC8 validation for data integrity

• Efficient bus handling using hardware-assisted timing

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Connections / Wiring

The DS2482 communicates via I²C.

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I²C Connection

DS2482 Pin	MCU Pin	Notes
VCC	3.3V / 5V	Depends on module
GND	GND	Common ground
SDA	SDA	I²C data
SCL	SCL	I²C clock

1-Wire Bus

DS2482 Pin	Connection
IO	1-Wire Data Line
VCC	3.3V/ 5V
GND	Common ground

I²C Notes

• Default I²C address: 0x18

• Supported bus speeds:

  • 100 kHz
  • 400 kHz (recommended)

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Installation

• Arduino Library Manager

  1. Open Arduino IDE
  2. Go to Library Manager
  3. Search for 7Semi DS2482
  4. Click Install

• Manual Installation

  1. Download this repository as ZIP
  2. Arduino IDE → Sketch → Include Library → Add .ZIP Library

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Library Overview

Initialize Device

DS2482_7Semi ds;

ds.begin(0x18);

Scan for Devices

if (ds.searchROM())
{
  uint8_t count = ds.getDeviceCount();
}

• Returns temperature in °C.

Read Device Address

uint8_t *device = ds.getDevice(0);