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

current transformer measurement AC current sensor 1 × 69SAR
WeMos D1 ESP8266 Wifi Board 1 × 98SAR
Fuse 5A – 6x30mm 1 × 4SAR
IR Remote Control+Receiver Module 1 × 37SAR
MEGA Board for Arduino Mega 2560 Projects 1 × 135SARSubtotal: 343SAR
current transformer measurement AC current sensor 1 × 69SAR
WeMos D1 ESP8266 Wifi Board 1 × 98SAR
Fuse 5A – 6x30mm 1 × 4SAR
IR Remote Control+Receiver Module 1 × 37SAR
MEGA Board for Arduino Mega 2560 Projects 1 × 135SARSubtotal: 343SAR
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