Removed dotenv dependency

Cargo.lock

@@ -302,12 +302,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "dotenv"
-version = "0.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77c90badedccf4105eca100756a0b1289e191f6fcbdadd3cee1d2f614f97da8f"
-
 [[package]]
 name = "either"
 version = "1.9.0"
@@ -863,7 +857,6 @@ checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 name = "pi"
 version = "0.1.1"
 dependencies = [
- "dotenv",
  "env_logger",
  "log",
  "rppal",

Cargo.toml

@@ -6,7 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-dotenv = "0.15.0"
 env_logger = "0.10.1"
 log = "0.4.20"
 rppal = "0.14.1"

README.md

@@ -1,15 +1,12 @@
 # Spaceapi Tuerpi
 
-Feeding our SpaceAPI with Data from our entrance door.
+Feeding our SpaceAPI with data from our entrance door.
 
-## Setup
+## Usage
 
-Please change `DOOR_PIN` accordingly.
+To run the client, please change `DOOR_PIN` accordingly to your setup. `DOOR_PIN` defaults to a closed door, when `HIGH`.
 
-`DOOR_PIN` defaults to a closed door, when HIGH.
-
-You need to provide the environment variables
-`SPACEAPI_URL` and `API_KEY`.
+You need to provide the environment variables `SPACEAPI_URL` and `API_KEY` to send the status to the SpaceAPI server. Details of the server can be found on the [project page](https://github.com/dezentrale/spaceapi-rs).
 
 ## Build
 
@@ -32,3 +29,53 @@ Build the application for raspberry pi:
 ```sh
 cargo build --target=armv7-unknown-linux-musleabihf
 ```
+
+## Install
+
+Build the project as release and place `pi` binary under `/usr/local/bin/spaceapi-tuerpi`
+
+```sh
+sudo install -m 755 -o root -g root \
+    target/release/pi \
+    /usr/local/bin/spaceapi-tuerpi
+```
+
+Configure the spaceapi systemd service by placing the service description under `/etc/systemd/system/spaceapi.service`:
+
+```
+[Unit]
+Description=SpaceAPI tuerpi client
+After=network.target
+
+[Service]
+Type=simple
+Restart=always
+EnvironmentFile=/etc/spaceapi-tuerpi.env 
+ExecStart=/usr/local/bin/spaceapi-tuerpi
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Place the environment configuration with URL and API-Key under `/etc/spaceapi-tuerpi.env`:
+
+```
+SPACEAPI_URL=<your SpaceAPI server endpoint>
+API_KEY=<your secret API key>
+#DOOR_PIN=27    # Set the door pin
+#RUST_LOG=ERROR # Set debug level
+```
+
+Ensure the `/etc/spaceapi-tuerpi.env` can be read only by root by executing:
+
+```sh
+sudo chmod 600 /etc/spaceapi-tuerpi.env
+sudo chown root:root /etc/spaceapi-tuerpi.env
+```
+
+Apply changes to systemd to enable and start the service
+
+```sh
+sudo systemctl daemon-reload
+sudo systemctl enable --now spaceapi
+```

src/main.rs

@@ -1,76 +1,77 @@
-use std::env;
-use std::thread::sleep;
-use std::time::Duration;
-
 use rppal::gpio::{Gpio, InputPin, Level};
-use spaceapi_dezentrale_client::Client;
+use spaceapi_dezentrale_client::ClientBuilder;
+use std::{env, time::Duration};
+use tokio::time::sleep;
 
-// set your scripts for opening and closing the space here
-static DOOR_PIN: u8 = 27;
-// delays in seconds
-static RECHECK_DELAY: u64 = 5;
-static ANTI_BOUNCE_DELAY: u64 = 1;
+// Static delays
+static RECHECK_DELAY: Duration = Duration::from_secs(5);
+static ANTI_BOUNCE_DELAY: Duration = Duration::from_secs(1);
+
+#[derive(Debug)]
+enum DoorStatus {
+    Open,
+    Closed,
+}
 
 #[tokio::main]
 async fn main() {
     env_logger::init();
 
+    let door_pin = env::var("DOOR_PIN").unwrap_or("27".to_string());
+    let door_pin = door_pin.parse().expect("A number for the DOOR_PIN");
+
     // setup
     log::debug!("Setup GPIO");
     let gpio = Gpio::new().unwrap();
-    let pin = gpio.get(DOOR_PIN).unwrap().into_input();
+    let pin = gpio.get(door_pin).unwrap().into_input();
 
-    let spaceapi_client = spaceapi_dezentrale_client::ClientBuilder::new()
-        .api_key(&env::var("API_KEY").unwrap())
-        .base_url(&env::var("SPACEAPI_URL").unwrap())
+    log::debug!("Build client");
+    let spaceapi_client = ClientBuilder::new()
+        .api_key(&env::var("API_KEY").expect("Set API_KEY in environment"))
+        .base_url(&env::var("SPACEAPI_URL").expect("Set SPACEAPI_URL in environment"))
         .build()
         .unwrap();
 
-    // get initial door status
-    let mut door_status_old = check_door(&pin);
-    let _ = push_door_status(&spaceapi_client, door_status_old).await;
-
     loop {
-        // maybe not the best solution but the pi isn't doing anything else
-        log::debug!("Waiting {} secs to read the door status", RECHECK_DELAY);
-        sleep(Duration::from_secs(RECHECK_DELAY));
-
-        // read new status
-        let door_status_new = check_door(&pin);
-        log::debug!("Read {}", door_status_new);
-
-        // if the new status isn't the old one
-        if door_status_old != door_status_new {
-            // wait for the switch to stop bouncing around
-            log::debug!("Waiting {} secs for recheck", ANTI_BOUNCE_DELAY);
-            sleep(Duration::from_secs(ANTI_BOUNCE_DELAY));
-            // the new read status is still the same after a minute then push it to the api
-            if door_status_new == check_door(&pin) {
-                log::debug!("Check passed, applying new status");
-                log::debug!("Pushing space status: Open = {}", door_status_new);
-                let _ = push_door_status(&spaceapi_client, door_status_new)
+        log::debug!("Checking door status");
+        match check_door(&pin).await {
+            DoorStatus::Open => {
+                log::debug!("Door is open, sending keep open to server");
+                let _ = spaceapi_client
+                    .keep_open()
                     .await
+                    .map(|_| ())
                     .map_err(|err| format!("Problem while pushing door status: {err}"));
-                log::debug!("Saving space status: {}", door_status_new);
-                door_status_old = door_status_new;
-            } else {
-                log::debug!("Check wasn't successful")
             }
+            DoorStatus::Closed => {
+                log::debug!("Door is closed, doing nothing");
+            }
+        };
+
+        log::debug!("Waiting {RECHECK_DELAY:?} secs to read the door status");
+        sleep(RECHECK_DELAY).await;
+    }
+}
+
+async fn check_door(pin: &InputPin) -> DoorStatus {
+    // reading space status from door
+    let mut pin_state = pin.read();
+
+    // Anti bounce verification
+    loop {
+        sleep(ANTI_BOUNCE_DELAY).await;
+        let pin_state_check = pin.read();
+        if pin_state_check == pin_state {
+            break;
+        } else {
+            pin_state = pin_state_check
         }
     }
-}
 
-fn check_door(pin: &InputPin) -> bool {
-    // reading space status from door
-    pin.read() == Level::Low
-}
-
-async fn push_door_status(spaceapi: &Client, open: bool) -> Result<(), String> {
-    if open {
-        log::debug!("Sending keep open to server");
-        spaceapi.keep_open().await.map(|_| ())
+    log::debug!("Pin state is {pin_state}");
+    if pin_state == Level::Low {
+        DoorStatus::Open
     } else {
-        log::debug!("Sending explicit close to server");
-        spaceapi.close().await
+        DoorStatus::Closed
     }
 }