Improve error handling, ensure robust defaults, and eliminate unsafe unwraps/expectations across modules.

Software/MainBoard/rust/src/log/mod.rs

@@ -97,7 +97,7 @@ pub async fn log(
 impl LogArray {
     pub fn get(&mut self) -> Vec<LogEntry> {
         let head: RangedU8<0, MAX_LOG_ARRAY_INDEX> =
-            RangedU8::new(self.head).unwrap_or(RangedU8::new(0).unwrap());
+            RangedU8::new(self.head).unwrap_or(RangedU8::new_saturating(0));
 
         let mut rv: Vec<LogEntry> = Vec::new();
         let mut index = head.wrapping_sub(1);
@@ -120,7 +120,7 @@ impl LogArray {
         txt_long: &str,
     ) {
         let mut head: RangedU8<0, MAX_LOG_ARRAY_INDEX> =
-            RangedU8::new(self.head).unwrap_or(RangedU8::new(0).unwrap());
+            RangedU8::new(self.head).unwrap_or(RangedU8::new_saturating(0));
 
         let mut txt_short_stack: heapless::String<TXT_SHORT_LENGTH> = heapless::String::new();
         let mut txt_long_stack: heapless::String<TXT_LONG_LENGTH> = heapless::String::new();
@@ -281,6 +281,8 @@ pub enum LogMessage {
     PumpMissingSensorCurrent,
     #[strum(serialize = "MPPT Current sensor could not be reached")]
     MPPTError,
+    #[strum(serialize = "Parsing error reading message")]
+    UnknownMessage,
 }
 
 #[derive(Serialize)]
@@ -301,7 +303,7 @@ impl From<&LogMessage> for MessageTranslation {
 impl LogMessage {
     pub fn log_localisation_config() -> Vec<MessageTranslation> {
         Vec::from_iter((0..LogMessage::len()).map(|i| {
-            let msg_type = LogMessage::from_ordinal(i).unwrap();
+            let msg_type = LogMessage::from_ordinal(i).unwrap_or(LogMessage::UnknownMessage);
             (&msg_type).into()
         }))
     }