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

Dip Switch 8P 1 × 9SAR
Switches push button 5pcs 12x12x7.3 – tactile switch 1 × 6SAR
Data Logging Shield SD card shield XD_204 1 × 68SARSubtotal: 83SAR
Dip Switch 8P 1 × 9SAR
Switches push button 5pcs 12x12x7.3 – tactile switch 1 × 6SAR
Data Logging Shield SD card shield XD_204 1 × 68SARSubtotal: 83SAR
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