Integrate JBD BMS telemetry into ESP32 status

firmware/esp32/xterra-controller/xterra-controller.ino

@@ -6,30 +6,59 @@
 #include "protocol.h"
 #include "relays.h"
 #include "sensors.h"
+#include "bms/bms.h"
 
 WebServer server(80);
 HardwareSerial DashboardSerial(2);
 
 String uartLineBuffer;
 
-float batterySOC = 82.0;
-float batteryVoltage = 13.2;
-float batteryCurrent = -6.4;
-float batteryRemainingAh = 82.0;
-float batteryRuntimeHours = 12.0;
-float batteryTemp = 76.0;
+float calculateRuntimeHours() {
+    if (!bmsData.valid || bmsData.current >= 0) {
+        return 0;
+    }
+
+    float dischargeAmps = -bmsData.current;
+    if (dischargeAmps <= 0.1) {
+        return 0;
+    }
+
+    return bmsData.remainingAh / dischargeAmps;
+}
 
 void buildStatusDocument(JsonDocument& doc) {
     doc["type"] = MSG_STATUS_RESPONSE;
     doc["timestamp"] = millis();
 
     JsonObject battery = doc.createNestedObject("battery");
-    battery["soc"] = batterySOC;
-    battery["voltage"] = batteryVoltage;
-    battery["current"] = batteryCurrent;
-    battery["remaining_ah"] = batteryRemainingAh;
-    battery["runtime_hours"] = batteryRuntimeHours;
-    battery["temperature_f"] = batteryTemp;
+
+    if (bmsData.valid) {
+        battery["source"] = "jbd_bms";
+        battery["connected"] = bmsData.connected;
+        battery["soc"] = bmsData.soc;
+        battery["voltage"] = bmsData.voltage;
+        battery["current"] = bmsData.current;
+        battery["remaining_ah"] = bmsData.remainingAh;
+        battery["capacity_ah"] = bmsData.capacityAh;
+        battery["runtime_hours"] = calculateRuntimeHours();
+        battery["temperature_f"] = bmsData.temperatureF;
+        battery["cycle_count"] = bmsData.cycleCount;
+        battery["cell_count"] = bmsData.cellCount;
+        battery["ntc_count"] = bmsData.ntcCount;
+    } else {
+        battery["source"] = "placeholder";
+        battery["connected"] = false;
+        battery["soc"] = 0;
+        battery["voltage"] = 0;
+        battery["current"] = 0;
+        battery["remaining_ah"] = 0;
+        battery["capacity_ah"] = 150;
+        battery["runtime_hours"] = 0;
+        battery["temperature_f"] = 0;
+        battery["cycle_count"] = 0;
+        battery["cell_count"] = 0;
+        battery["ntc_count"] = 0;
+    }
 
     JsonObject temps = doc.createNestedObject("temps");
 
@@ -237,6 +266,7 @@ void setup() {
 
     initRelays();
     initSensors();
+    initBms();
 
     WiFi.mode(WIFI_AP);
 
@@ -264,6 +294,7 @@ void setup() {
 
 void loop() {
     server.handleClient();
+    updateBms();
     pollDashboardUart();
 
     static unsigned long lastSensorUpdate = 0;