![Amazon.com: SparkFun Qwiic Shield Compatible with Arduino Nano-connect the I2C bus (GND, 3.3V, SDA and SCL) to four Qwiic connectors (two horizontally and two vertically mounted)-daisy chaining-Soldering Required : Electronics Amazon.com: SparkFun Qwiic Shield Compatible with Arduino Nano-connect the I2C bus (GND, 3.3V, SDA and SCL) to four Qwiic connectors (two horizontally and two vertically mounted)-daisy chaining-Soldering Required : Electronics](https://m.media-amazon.com/images/I/614anl2kKdL.jpg)
Amazon.com: SparkFun Qwiic Shield Compatible with Arduino Nano-connect the I2C bus (GND, 3.3V, SDA and SCL) to four Qwiic connectors (two horizontally and two vertically mounted)-daisy chaining-Soldering Required : Electronics
![sensors - Connecting two Arduinos via I2C while I2C Pins A4/A5 are already in use - Arduino Stack Exchange sensors - Connecting two Arduinos via I2C while I2C Pins A4/A5 are already in use - Arduino Stack Exchange](https://i.stack.imgur.com/4GgfN.png)
sensors - Connecting two Arduinos via I2C while I2C Pins A4/A5 are already in use - Arduino Stack Exchange
![I2C SDA line is connected to a wrong Arduino Nano pin · Issue #1 · beast-devices/TougherPowerMonitor-HW · GitHub I2C SDA line is connected to a wrong Arduino Nano pin · Issue #1 · beast-devices/TougherPowerMonitor-HW · GitHub](https://user-images.githubusercontent.com/8793368/113478016-7686b400-9486-11eb-8b55-32b2762609d3.png)