WISRD Research & Engineering Journal

3. Raspberry Pi The Raspberry Pi was chosen because of its size, capabilities, and low cost. 3.1 Specs of the Raspberry Pi 4b ● Processor: Quad core Cortex-A72(ARM 8) 64-bit SoC at 1.5GHz turbo boost up to 2GHz ● Ram: 8GB LPDDR4-3200 SDRAM

● Wifi: 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, ● Bluetooth: 5.0 BLE with the option of gigabit ethernet ● USB Ports: Two USB 3.0 ports and two USB 2.0 ports ● Pi standard 40 pin GPIO header ● Two micro-HDMI ports which support up to 4kp60 ● 2-lane MIPI camera ports ● H.264 (4kp60 decode), H.264 (1080p60 decode, 1080p30 encode) ● OpenGL ES 3.1, Vulkan 1 ● Storage: Micro-SD card slot for loading operating system and data storage ● 5V DC via USB-C connector (at a minimum of 3A*)

● 5V DC via GPIO header (minimum at 3A*) ● Ambient operating temperature: 0-50 o C 3.2 Setting up the Raspberry Pi

A 128GB microSD card was purchased and the relevant software, installed on a laptop, was Raspberry Pi Imager (Figure 11), which configures the latest version of the Raspbian OS for the Pi on the SD card. After inserting the micro-SD card to the micro SD card reader on the Pi could boot up the system.

Figure 11 : Left: Picture of the Raspberry Pi Imager app. Right: Picture of the app open. Monitoring coral growth in the marine laboratory at MORI necessitated receiving open lines of communication to the Raspberry Pi. To set up communication with the Pi, a static IP address for the Pi was configured. Three methods were set up to access our microcomputer remotely: ssh, VNC, and FTP. For the VNC server, both internal and external IP addresses were configured to go to the Pi’s ip address at port 5900 that made the pi accessible on campus and from home. The

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