ev: new params: parametrize instead of hardcode

Author: manio

contrib/config.toml

@@ -88,3 +88,9 @@
   # Path to script executed when Android Auto session starts/stops and EV battery data is needed
   # Argument "start" or "stop" is appended automatically when invoked
   # ev_battery_logger = "/usr/bin/some_script"
+
+  # Traction battery capacity [Wh]
+  ev_battery_capacity = 22000
+
+  # Some unknown parameter - change this to have a correct range (u2->u3)
+  ev_factor = 0.075

src/main.rs

@@ -141,6 +141,8 @@ pub struct AppConfig {
     dhu: bool,
     ev: bool,
     ev_battery_logger: Option<PathBuf>,
+    ev_battery_capacity: u64,
+    ev_factor: f32,
 }
 
 impl Default for AppConfig {
@@ -172,6 +174,8 @@ impl Default for AppConfig {
             dhu: false,
             ev: false,
             ev_battery_logger: None,
+            ev_battery_capacity: 22000,
+            ev_factor: 0.075,
         }
     }
 }