Use Qwiic cables

Sensors and minimal capacitors are available as break out boards. They can be connected to an ESP32 using soldering on pin or using a cable system such as the Qwiic system.

All Qwiic cables have the following color scheme and arrangement:

• Black = GND - to be connected to the GND ground pin of the ESP32

• Red = 3.3V - to be connected to the 3.3V power pin of the ESP32

• Blue = SDA - data channel to be connected to any numbered pin of the ESP32

• Yellow = SCL - clock line to be connected to any numbered pin of the ESP32. It is used to synchronize all data transfers over the I²C bus.

When more than one sensor / actuator is needed, you can use a breadboard to allow for multiple connections. It is also sometimes possible to connect several sensors one after the other with Qwiic cables.