Adafruit
Adafruit DS2482S-800 8 Channel I2C to 1-Wire Bus Adapter
· MPN: ADA6027
The Adafruit DS2482S-800 is an 8-channel I2C-to-1-Wire bus adapter on a STEMMA QT breakout board. It allows any I2C-capable microcontroller or single-board c...
The Adafruit DS2482S-800 is an 8-channel I2C-to-1-Wire bus adapter on a STEMMA QT breakout board. It allows any I2C-capable microcontroller or single-board computer to communicate with 1-Wire devices — most commonly DS18B20 temperature sensors — without needing to bit-bang the 1-Wire protocol.
The eight selectable channels let you assign each sensor to a dedicated channel, eliminating the need to identify sensors by their unique ROM addresses. This makes sensor swaps and installations straightforward. The breakout supports both parasitic and external power modes, operates at 3.3V or 5V, and features an adjustable I2C address for multi-device buses.
Key Features
- 8 Selectable 1-Wire Channels – Know exactly which sensor is on which channel
- I2C to 1-Wire Bridge – No bit-banging required; works with any I2C host
- Parasitic Power Support – Built-in pull-ups for parasitic-powered 1-Wire devices
- Adjustable I2C Address – Multiple adapters on the same I2C bus
- 3.3V and 5V Compatible – STEMMA QT voltage also powers 1-Wire peripherals
- STEMMA QT / Qwiic Connectors – Solderless I2C connection and daisy-chaining
Ideal For
- Multi-sensor DS18B20 temperature monitoring
- Adding 1-Wire support to microcontrollers without native protocol support
- Desktop or SBC data acquisition via I2C
- Environmental monitoring with identified sensor locations
Package Contents
- 1× DS2482S-800 I2C-to-1-Wire adapter breakout with STEMMA QT connectors
Jargon buster
Plain-language definitions for the technical terms used above.
- 1-Wire
- 1-Wire is a communication method where devices share a single data line, often with each device having its own address. It matters because several temperature modules can be connected to one microcontroller pin instead of needing a separate pin for each probe.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- DS18B20
- A common digital temperature sensor often sold in waterproof probe form. It matters here because the kit does not include temperature measurement, and a DS18B20 is the suggested add-on if your water readings need temperature context.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2C address
- An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- single-board computer
- A complete computer built onto one circuit board, usually including the processor, memory, ports, and connectors. This matters because accessories like heatsinks must match the board’s layout and mounting holes to fit properly.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- UPS
- An uninterruptible power supply is a battery-backed power system that keeps a device running when external power is unplugged or fails. For an embedded computer, it helps prevent sudden shutdowns that can corrupt files or interrupt a project.
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