Arduino UNO R4 WiFi User Manual

Name: Arduino UNO R4 WiFi
Brand: Arduino
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Arduino® UNO R4 WiFi

14 / 23 Arduino® UNO R4 WiFi Modiﬁed: 26/06/2023

10 I2C Connector

The I2C connector SM04B-SRSS-TB(LF)(SN) is connected to a secondary I2C bus on the board. Note that this

connector is powered via 3.3 V.

I2C connector.

This connector also shares the following pin connections:

JANALOG header

JDIGITAL header

SDA

SCL

Note: as A4/A5 is connected to the main I2C bus, these should not be used as ADC inputs whenever the bus is in

use. You can however connect I2C devices to each of these pins and connectors simultaneously.

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