SwiftGarden 3.自動給水を行う – SwiftでラズパイのGPIOを操作する

import SwiftyGPIO

final class GPIOManager {
    static let shared = GPIOManager()
    private let waterDrainGPIO: GPIO

    init() {
        let gpios = SwiftyGPIO.GPIOs(for: .RaspberryPi4)
        waterDrainGPIO = gpios[.P21]! // ①
        waterDrainGPIO.direction = .OUT // ②
    }

    func drainWater() async {
        waterDrainGPIO.value = 1
        print("Started draining water")
        // Can't use UInt64 because raspberry-pi is 32bit
        try! await Task.sleep(nanoseconds: 5 * 1_000_000_000)
        waterDrainGPIO.value = 0
        print("Stopped draining water")
    }
}

func drainWater(second: Int) async {
    waterDrainGPIO.value = 1
    print("Started draining water")
    // Can't use UInt64 because raspberry-pi is 32bit
    try! await Task.sleep(nanoseconds: UInt64(second * 1_000_000_000))
    waterDrainGPIO.value = 0
    print("Stopped draining water")
}

enum CommandKind {
    case captureData
    case drainWater
    case switchLight(isON: Bool)

    static func converted(from arguments: [String]) -> CommandKind {
        print(arguments)
        if arguments.isEmpty {
            fatalError("Parameter is required!")
        } else if arguments.count == 3 {
            switch arguments {
            case "--switchLight":
                switch arguments {
                case "isOn":
                    return .switchLight(isON: true)
                case "isOff":
                    return .switchLight(isON: false)
                default:
                    fatalError("Invalid parameter")
                }
            default:
                fatalError("Invalid parameter")
            }
        } else if arguments.count == 2 {
            switch arguments {
            case "--captureData":
                return .captureData
            case "--drainWater":
                return .drainWater
            default:
                fatalError("Invalid parameter")
            }
        } else {
            fatalError("Parameter is required!")
        }
    }
}

#!/bin/bash

current_date=$(date +"%Y%m%d%H%M%S")
output_file="/home/${HOME_DIRECTORY_NAME}/result/Result/DrainWater/output_drain_water_${current_date}.txt"
SwiftGardenPi --drainWater >> $output_file

# 1
sudo nano /etc/systemd/system/drain_water.service
# 2
sudo nano /etc/systemd/system/drain_water.timer

[Unit]
Description=Drain water automatically(This is comment)
After=network.target

[Service]
ExecStart=/path/to/your/drain_water.sh
WorkingDirectory=/home/${HOME_DIRECTORY_NAME}/${APP_DIRECTORY}

[Unit]
Description=Drain water every 9 A.M.
After=network.target

[Timer]
OnCalendar=*-*-* 09:00:00

[Install]
WantedBy=timers.target

sudo systemctl enable drain_water.timer