USB shield – usb host shield
if you will not use External Power please be sure this jumpers are soldered as below :

so after soldering it will be like this image

Raindrops Rainwater Sensor Module 1 × 34SAR
ATmega328 Mircocontroller 1 × 29SAR
NANO Board for Arduino Nano projects 1 × 55SARSubtotal: 118SAR
Raindrops Rainwater Sensor Module 1 × 34SAR
ATmega328 Mircocontroller 1 × 29SAR
NANO Board for Arduino Nano projects 1 × 55SARSubtotal: 118SAR
if you will not use External Power please be sure this jumpers are soldered as below :

so after soldering it will be like this image

All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components