Adafruit DS2484 Shield

Overview

The Adafruit DS2484 I2C to 1-Wire Bus Adapter Shield features an Analog Devices DS2484 1-Wire Master and two STEMMA QT connectors.

Adafruit DS2484 Shield (Credit: Adafruit)

Requirements

This shield can be used with boards which provide an I2C connector, for example STEMMA QT or Qwiic connectors. The target board must define a zephyr_i2c node label. See Shields for more details.

Pin Assignments

Shield Pin	Function
SDA	DS2484 I2C SDA
SCL	DS2484 I2C SCL
1WIRE	Connection to 1-Wire devices
SLPZ	Digital input for sleep mode

See maxim,ds2484 for documentation on how to adjust the devicetree file for sleep mode etc.

Programming

Set --shield adafruit_ds2484 when you invoke west build. For example when running the 1-Wire scanner 1-Wire scanning sample:

# From the root of the zephyr repository
west build -b adafruit_qt_py_rp2040 --shield adafruit_ds2484 samples/drivers/w1/scanner

Connect one or several 1-Wire devices to the shield before running the scanning sample.