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
How to Setup I2C Communication on the Arduino - Circuit Basics
I2C SDA line is connected to a wrong Arduino Nano pin · Issue #1 · beast-devices/TougherPowerMonitor-HW · GitHub