wifi config file handling added

rust/src/config.rs

@@ -1,10 +1,12 @@
+use std::fmt;
 
+use serde::{Serialize, Deserialize};
 
 use crate::PLANT_COUNT;
-pub struct Config {
-    ssid: heapless::String<32>,
-    password: Option<heapless::String<64>>,
 
+
+#[derive(Serialize, Deserialize)]
+pub struct Config {
     tank_sensor_enabled: bool,
     tank_full_ml: u32,
     tank_warn_percent: u8,
@@ -19,6 +21,16 @@ pub struct Config {
     night_lamp_hour_start: u8,
     night_lamp_hour_end: u8,
     night_lamp_only_when_dark: u8
-    
-    
+}
+#[derive(Serialize, Deserialize)]
+#[derive(Debug)]
+pub struct WifiConfig {
+    pub ssid: heapless::String<32>,
+    pub password: Option<heapless::String<64>>,
+}
+
+impl fmt::Display for WifiConfig {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "({}, ****)", self.ssid)
+    }
 }