Add monitor state reset on device reconnection

Introduces a resetState() method to IMonitor and its implementations, allowing monitor alert states to be reset to OK when ESC or BMS devices reconnect. This ensures alerts are re-evaluated cleanly after a device is reconnected, improving reliability and user feedback.

Author: zjwhitehead

inc/sp140/simple_monitor.h

@@ -117,6 +117,7 @@ struct IMonitor {
   virtual void check() = 0;
   virtual SensorID getSensorID() const = 0;
   virtual SensorCategory getCategory() const = 0;  // Each monitor knows its category
+  virtual void resetState() = 0;  // Reset internal alert state to OK
 };
 
 // Sensor monitor for analog values
@@ -154,6 +155,10 @@ struct SensorMonitor : public IMonitor {
   SensorCategory getCategory() const override {
     return category;
   }
+
+  void resetState() override {
+    last = AlertLevel::OK;
+  }
 };
 
 // New monitor for boolean conditions
@@ -189,6 +194,10 @@ struct BooleanMonitor : public IMonitor {
     SensorCategory getCategory() const override {
         return category;
     }
+
+    void resetState() override {
+        lastState = !alertOnTrue;  // Reset to the non-alerting state
+    }
 };
 
 // Global monitor registry

src/sp140/simple_monitor.cpp

@@ -338,6 +338,25 @@ void checkAllSensorsWithData(const STR_ESC_TELEMETRY_140& escData,
     }
   }
 
+  // If a device reconnected, reset monitor states so they can alert fresh (like at boot)
+  if (!prevEscConnected && escConnected) {
+    USBSerial.println("[MONITOR] ESC reconnected - resetting ESC monitor states");
+    for (auto* monitor : monitors) {
+      if (monitor && monitor->getCategory() == SensorCategory::ESC) {
+        monitor->resetState();
+      }
+    }
+  }
+
+  if (!prevBmsConnected && bmsConnected) {
+    USBSerial.println("[MONITOR] BMS reconnected - resetting BMS monitor states");
+    for (auto* monitor : monitors) {
+      if (monitor && monitor->getCategory() == SensorCategory::BMS) {
+        monitor->resetState();
+      }
+    }
+  }
+
   // Update previous connection states
   prevEscConnected = escConnected;
   prevBmsConnected = bmsConnected;