feat: better error handling

Logs are better for connection events!

arduino/feather-evm.ino

@@ -14,7 +14,7 @@ uint16_t read_from_msp(unsigned int reg, int size) {
   Wire.beginTransmission(msp_address);
   Wire.write(reg);
   Wire.endTransmission(false);
-  Wire.requestFrom(msp_address, 1);
+  Wire.requestFrom(msp_address, size);
 
   unsigned int returnInt = Wire.read();
   for(int i = 0; i < size-1; i++) {
@@ -70,7 +70,7 @@ int get_register_from_params(String command_params) {
 
 int get_third_from_params(String command_params) {
   String sub = command_params.substring(command_params.indexOf(' '));
-  String third = sub.substring(command_params.indexOf(' ')+1);
+  String third = sub.substring(command_params.indexOf(' '));
   return third.toInt();
 }
 
@@ -92,10 +92,11 @@ void loop() {
     if (x == '\n')
     {
       input[i] = 0x00;
+
       String command = String(input);
       String command_head = command.substring(0, command.indexOf(' '));
       String command_params = command.substring(command.indexOf(' ') + 1);
-      
+
       unsigned int device = get_device_from_params(command_params);
       unsigned int reg = get_register_from_params(command_params);
       unsigned int third = get_third_from_params(command_params);

src-tauri/src/main.rs

@@ -42,7 +42,8 @@ fn open_serial_port(port_state: tauri::State<PortState>, port_name: &str, baud_r
         Ok(p) => p,
         Err(e) => match e.kind {
             ErrorKind::NoDevice => return 1,
-            _ => return 2,
+            ErrorKind::Io(_) => return 3,
+            _ => return 4,
         },
     };
 
@@ -56,7 +57,7 @@ fn open_serial_port(port_state: tauri::State<PortState>, port_name: &str, baud_r
             return 0;
         }
         Err(_) => {
-            return 3;
+            return 2;
         }
     }
 }

src/lib/Connect.svelte

@@ -28,6 +28,11 @@
                 break;
             }
 
+            case StatusCode.UNKNOWN: {
+                portError = port_name + ": Error Opening Port (In use by another process?)"; 
+                break;
+            }
+
             default: {
                 portError = port_name + ": " + portResponse;
                 break;

src/lib/StatusCode.ts

@@ -2,6 +2,8 @@ enum StatusCode {
     SUCCESS=0,
     NO_DEVICE=1,
     MUTEX_ERROR=2,
+    IO_ERROR=3,
+    UNKNOWN=4,
 }
 
 export default StatusCode;