The tag '1602a' is only used once. This is the project:
ESP32 Magnetometer
Magnetometer using ESP32 and HMC5883L. Uses an app accesible through WiFi to read heading.
Full instructions: ESP32 Magnetometer HMC5883L
Magnetometer using ESP32 and HMC5883L. Uses an app accesible through WiFi to read heading.
Full instructions: ESP32 Magnetometer HMC5883L