added buzzer

Cargo.lock

@@ -79,9 +79,18 @@ name = "fw-anwesenheit"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "gpio",
  "regex",
+ "serde",
+ "serde_json",
 ]
 
+[[package]]
+name = "gpio"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fe6783270536547ac473c9d2ae5a7e0e715ea43f29004ced47fbd1c1372d2c7"
+
 [[package]]
 name = "iana-time-zone"
 version = "0.1.63"
@@ -106,6 +115,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
+
 [[package]]
 name = "js-sys"
 version = "0.3.77"
@@ -202,6 +217,12 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
 
+[[package]]
+name = "ryu"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
+
 [[package]]
 name = "serde"
 version = "1.0.219"
@@ -222,6 +243,18 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
+version = "1.0.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"

Cargo.toml

@@ -5,4 +5,7 @@ edition = "2024"
 
 [dependencies]
 chrono = { version = "0.4.40", features = ["serde"] }
+gpio = "0.4.1"
 regex = "1.11.1"
+serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0.140"

src/buzzer.rs

@@ -0,0 +1,40 @@
+use rppal::gpio::Gpio;
+use std::{thread, time};
+
+/// Gibt einen Ton auf einem passiven Buzzer aus.
+pub fn modulated_tone(pin_num: u8, carrier_hz: u32, sound_hz: u32, duration_ms: u64) {
+    let gpio = Gpio::new().expect("GPIO konnte nicht initialisiert werden");
+    let mut pin = gpio.get(pin_num).expect("Pin konnte nicht geöffnet werden").into_output();
+
+    let carrier_period = time::Duration::from_micros((1_000_000.0 / carrier_hz as f64 / 2.0) as u64);
+    let mod_period = 1_000.0 / sound_hz as f64; // in ms
+    let total_cycles = duration_ms as f64 / mod_period;
+
+    for _ in 0..total_cycles as u64 {
+        // Modulations-Ein: Träger an für mod_period / 2
+        let cycles_on = (carrier_hz as f64 * (mod_period / 2.0) / 1000.0) as u64;
+        for _ in 0..cycles_on {
+            pin.set_high();
+            thread::sleep(carrier_period);
+            pin.set_low();
+            thread::sleep(carrier_period);
+        }
+
+        // Modulations-Aus: Träger aus für mod_period / 2
+        let pause = time::Duration::from_millis((mod_period / 2.0) as u64);
+        thread::sleep(pause);
+    }
+}
+
+pub fn beep_ack() {
+    // GPIO 17, Träger = 2300 Hz, Ton = 440 Hz, Dauer = 1 Sekunde
+    modulated_tone(4, 2300, 500, 500);
+    modulated_tone(4, 2300, 700, 500);
+}
+
+pub fn beep_nak() {
+        // GPIO 17, Träger = 2300 Hz, Ton = 440 Hz, Dauer = 1 Sekunde
+        modulated_tone(4, 2300, 700, 500);
+        modulated_tone(4, 2300, 500, 500);
+}
+

src/id_store.rs

@@ -1,30 +1,39 @@
-use std::collections::HashMap;
+use std::{collections::HashMap, error::Error, fs::{self, read_to_string}, result};
+use serde::{Deserialize, Serialize};
 
 #[derive(PartialEq, Eq)]
+#[derive(Deserialize, Serialize)]
 struct TellyID (String);
 
+#[derive(Deserialize, Serialize)]
 struct AttendanceDay {
     date: String,
     ids: Vec<TellyID>,
 }
 
+#[derive(Deserialize, Serialize)]
 struct IDStore {
     days: HashMap<String,AttendanceDay>
 }
 
 impl IDStore {
+    
     fn new() -> Self {
         IDStore{
             days: HashMap::new(),
         }
     }
 
+    fn new_from_json(filepath:&str) -> Result<Self, Box<dyn Error>>{
+        let readed_string = fs::read_to_string(filepath)?;
+        Ok(serde_json::from_str(&readed_string)?)
+    }
+
     fn add_id(&mut self, id: TellyID){
         let day = self.get_current_day();
 
         day.add_id(id);
     
-        self.clean_map();
     }
 
     fn get_current_day(&mut self) -> &mut AttendanceDay {
@@ -39,8 +48,10 @@ impl IDStore {
         self.days.get_mut(&current_day.clone()).unwrap()
     }
 
-    fn clean_map(&mut self){
+    fn export_jason(&self, filepath:&str) -> Result <(), Box<dyn Error>> {
-       todo!()
+
+        // Serialize it to a JSON string and safe it in filepath file
+        Ok(fs::write("attendence_list.json", serde_json::to_string(&self)?)?)
     }
 }
 
@@ -56,7 +67,6 @@ impl AttendanceDay {
         if self.ids.contains(&id) {
             return
         } 
-
         self.ids.push(id);
     }
 }

src/main.rs

@@ -3,6 +3,7 @@ use pm3::run_pm3;
 mod parser;
 mod pm3;
 mod id_store;
+mod buzzer;
 
 fn main() {
     run_pm3().unwrap();