Hardware

To make the Wi-Pi device we used the following pieces of hardware.

Raspberry Pi 4 Model B

Specifications:

  • Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.8GHz
  • 4GB LPDDR4-3200 SDRAM (depending on model)
  • 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE
    Gigabit Ethernet
  • 2 USB 3.0 ports; 2 USB 2.0 ports.
  • Raspberry Pi standard 40 pin GPIO header (fully backwards compatible with previous boards)
  • 2 × micro-HDMI® ports (up to 4kp60 supported)
  • 2-lane MIPI DSI display port
  • 2-lane MIPI CSI camera port
  • 4-pole stereo audio and composite video port
    H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
  • OpenGL ES 3.1, Vulkan 1.0
  • Micro-SD card slot for loading operating system and data storage
  • 5V DC via USB-C connector (minimum 3A*)
  • 5V DC via GPIO header (minimum 3A*)
  • Power over Ethernet (PoE) enabled (requires separate PoE HAT)
  • Operating temperature: 0 – 50 degrees C ambient

* A good quality 2.5A power supply can be used if downstream USB peripherals consume less than 500mA in total.

Raspberry Pi Touch Display 2

Specifications:

  • Size: 189.32mm × 120.24mm
  • Display size (diagonal): 7 inches
  • Display format: 720 (RGB) × 1280 pixels
  • Active area: 88mm × 155mm
  • LCD type: TFT, normally white, transmissive
  • Touch panel: True multi-touch capacitive touch panel, supporting five-finger touch
  • Surface treatment: Anti-glare
  • Colour configuration: RGB-stripe
  • Backlight type: LED B/L

Waveshare Raspberry Pi PN532 NFC HAT

Specifications:

  • Brand: Waveshare
  • Model name: Waveshare Raspberry Pi NFC HAT
    RAM memory installed size 1 GB
  • Connectivity technology: I2C, GPIO
  • Included components: development resources and a manual
  • Operating system: Linux-Raspberry Pi OS
  • CPU manufacturer: VIA
  • Wireless communication: standard Bluetooth
  • Compatible devices: Raspberry Pi Models
  • RAM memory technology: GPIO