Merge pull request #151 from dalathegreat/feature/LEAF-charger

Feature: LEAF charger + Cell monitoring

Software/Software.ino

@@ -70,6 +70,7 @@ uint8_t bms_status = ACTIVE;            // ACTIVE - [0..5]<>[STANDBY,INACTIVE,DA
 uint16_t stat_batt_power = 0;           // Power going in/out of battery
 uint16_t cell_max_voltage = 3700;       // Stores the highest cell voltage value in the system
 uint16_t cell_min_voltage = 3700;       // Stores the minimum cell voltage value in the system
+uint16_t cellvoltages[120];             // Stores all cell voltages
 bool LFP_Chemistry = false;
 
 // Common charger parameters
@@ -414,8 +415,12 @@ void receive_can() {  // This section checks if we have a complete CAN message i
 #ifdef SMA_CAN
       receive_can_sma(rx_frame);
 #endif
+      // Charger
 #ifdef CHEVYVOLT_CHARGER
       receive_can_chevyvolt_charger(rx_frame);
+#endif
+#ifdef NISSANLEAF_CHARGER
+      receive_can_nissanleaf_charger(rx_frame);
 #endif
     } else {
       //printf("New extended frame");
@@ -478,6 +483,9 @@ void send_can() {
 #ifdef CHEVYVOLT_CHARGER
   send_can_chevyvolt_charger();
 #endif
+#ifdef NISSANLEAF_CHARGER
+  send_can_nissanleaf_charger();
+#endif
 }
 
 #ifdef DUAL_CAN

Software/USER_SETTINGS.cpp

@@ -15,7 +15,7 @@ volatile uint16_t MAXCHARGEAMP =
 volatile uint16_t MAXDISCHARGEAMP =
     300;  //30.0A , BYD CAN specific setting, Max discharge speed in Amp (Some inverters needs to be artificially limited)
 
-/* Charger settings */
+/* Charger settings (Optional, when generator charging) */
 volatile float CHARGER_SET_HV = 384;      // Reasonably appropriate 4.0v per cell charging of a 96s pack
 volatile float CHARGER_MAX_HV = 420;      // Max permissible output (VDC) of charger
 volatile float CHARGER_MIN_HV = 200;      // Min permissible output (VDC) of charger

Software/USER_SETTINGS.h

@@ -41,6 +41,7 @@
 
 /* Select charger used (Optional) */
 //#define CHEVYVOLT_CHARGER //Enable this line to control a Chevrolet Volt charger connected to battery - for example, when generator charging or using an inverter without a charging function.
+//#define NISSANLEAF_CHARGER //Enable this line to control a Nissan LEAF PDM connected to battery - for example, when generator charging
 
 /* Battery limits: These are set in the USER_SETTINGS.cpp file, or later on via the Webserver */
 extern volatile uint16_t BATTERY_WH_MAX;
@@ -50,7 +51,7 @@ extern volatile uint16_t MAXCHARGEAMP;
 extern volatile uint16_t MAXDISCHARGEAMP;
 extern volatile uint8_t AccessPointEnabled;
 
-/* Charger limits: Set in the USER_SETTINGS.cpp or later in the webserver */
+/* Charger limits (Optional): Set in the USER_SETTINGS.cpp or later in the webserver */
 extern volatile float charger_setpoint_HV_VDC;
 extern volatile float charger_setpoint_HV_IDC;
 extern volatile float charger_setpoint_HV_IDC_END;

Software/src/battery/NISSAN-LEAF-BATTERY.cpp

@@ -237,6 +237,11 @@ void update_values_leaf_battery() { /* This function maps all the values fetched
     max_target_charge_power = 0;  //No need to charge further, set max power to 0
   }
 
+  //Map all cell voltages to the global array
+  for (int i = 0; i < 96; ++i) {
+    cellvoltages[i] = cell_voltages[i];
+  }
+
   bms_status = ACTIVE;  //Startout in active mode
 
   /*Extra safety functions below*/
@@ -856,7 +861,10 @@ void send_can_leaf_battery() {
         break;
     }
 
+//Only send this message when NISSANLEAF_CHARGER is not defined (otherwise it will collide!)
+#ifndef NISSANLEAF_CHARGER
     ESP32Can.CANWriteFrame(&LEAF_1F2);  //Contains (CHG_STA_RQ == 1 == Normal Charge)
+#endif
 
     mprun10r = (mprun10r + 1) % 20;  // 0x1F2 patter repeats after 20 messages. 0-1..19-0
 

Software/src/battery/NISSAN-LEAF-BATTERY.h

@@ -26,6 +26,7 @@ extern uint16_t temperature_max;   //C+1,  Goes thru convert2unsignedint16 funct
 extern uint16_t cell_max_voltage;   //mV,   0-4350
 extern uint16_t cell_min_voltage;   //mV,   0-4350
 extern uint8_t LEDcolor;            //Enum, 0-10
+extern uint16_t cellvoltages[120];  //mV    0-4350 per cell
 extern bool batteryAllowsContactorClosing;  //Bool, 1=true, 0=false
 
 void update_values_leaf_battery();

Software/src/battery/TESLA-MODEL-3-BATTERY.cpp

@@ -451,6 +451,22 @@ void receive_can_tesla_model_3_battery(CAN_frame_t rx_frame) {
         min_temp = (rx_frame.data.u8[3] * 5) - 400;  //Multiply by 5 and remove offset to get C+1 (0x61*5=485-400=8.5*C)
       }
       break;
+    case 0x401:  // Cell stats
+      mux = (rx_frame.data.u8[0]);
+
+      static uint16_t volts;
+
+      if (rx_frame.data.u8[1] == 0x2A)  // status byte must be 0x2A to read cellvoltages
+      {
+        // Example, frame3=0x89,frame2=0x1D = 35101 / 10 = 3510mV
+        volts = ((rx_frame.data.u8[3] << 8) | rx_frame.data.u8[2]) / 10;
+        cellvoltages[mux * 3] = volts;
+        volts = ((rx_frame.data.u8[5] << 8) | rx_frame.data.u8[4]) / 10;
+        cellvoltages[1 + mux * 3] = volts;
+        volts = ((rx_frame.data.u8[7] << 8) | rx_frame.data.u8[6]) / 10;
+        cellvoltages[2 + mux * 3] = volts;
+      }
+      break;
     case 0x2d2:
       //Min / max limits
       min_voltage = ((rx_frame.data.u8[1] << 8) | rx_frame.data.u8[0]) * 0.01 * 2;  //Example 24148mv * 0.01 = 241.48 V

Software/src/battery/TESLA-MODEL-3-BATTERY.h

@@ -28,6 +28,7 @@ extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 funct
 extern uint16_t temperature_max;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
 extern uint16_t cell_max_voltage;   //mV,   0-4350
 extern uint16_t cell_min_voltage;   //mV,   0-4350
+extern uint16_t cellvoltages[120];  //mV    0-4350 per cell
 extern uint8_t LEDcolor;            //Enum, 0-10
 extern bool batteryAllowsContactorClosing;   //Bool, 1=true, 0=false
 extern bool inverterAllowsContactorClosing;  //Bool, 1=true, 0=false

Software/src/battery/TEST-FAKE-BATTERY.cpp

@@ -25,7 +25,7 @@ void update_values_test_battery() { /* This function puts fake values onto the p
 
   StateOfHealth = 9900;  // 99.00%
 
-  battery_voltage = 3700;  // 370.0V
+  //battery_voltage = 3700;  // 370.0V , value set in startup in .ino file, editable via webUI
 
   battery_current = 0;  // 0 A
 
@@ -33,9 +33,9 @@ void update_values_test_battery() { /* This function puts fake values onto the p
 
   remaining_capacity_Wh = 15000;  // 15kWh
 
-  cell_max_voltage = 3750;
+  cell_max_voltage = 3596;
 
-  cell_min_voltage = 3730;
+  cell_min_voltage = 3500;
 
   stat_batt_power = 0;  // 0W
 
@@ -47,6 +47,10 @@ void update_values_test_battery() { /* This function puts fake values onto the p
 
   max_target_charge_power = 5000;  // 5kW
 
+  for (int i = 0; i < 97; ++i) {
+    cellvoltages[i] = 3500 + i;
+  }
+
 /*Finally print out values to serial if configured to do so*/
 #ifdef DEBUG_VIA_USB
   Serial.println("FAKE Values going to inverter");

Software/src/battery/TEST-FAKE-BATTERY.h

@@ -25,6 +25,7 @@ extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 funct
 extern uint16_t temperature_max;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
 extern uint16_t cell_max_voltage;   //mV,   0-4350
 extern uint16_t cell_min_voltage;   //mV,   0-4350
+extern uint16_t cellvoltages[120];  //mV 0-5000 per cell
 extern bool batteryAllowsContactorClosing;   //Bool, 1=true, 0=false
 extern bool inverterAllowsContactorClosing;  //Bool, 1=true, 0=false
 extern uint8_t LEDcolor;                     //Enum, 0-10

Software/src/charger/CHARGERS.h

@@ -2,7 +2,11 @@
 #define CHARGERS_H
 
 #ifdef CHEVYVOLT_CHARGER
-#include "chevyvolt.h"
+#include "CHEVY-VOLT-CHARGER.h"
+#endif
+
+#ifdef NISSANLEAF_CHARGER
+#include "NISSAN-LEAF-CHARGER.h"
 #endif
 
 #endif

Software/src/charger/CHEVY-VOLT-CHARGER.cpp

@@ -1,4 +1,4 @@
-#include "chevyvolt.h"
+#include "CHEVY-VOLT-CHARGER.h"
 #include "../lib/miwagner-ESP32-Arduino-CAN/CAN_config.h"
 #include "../lib/miwagner-ESP32-Arduino-CAN/ESP32CAN.h"
 

Software/src/charger/CHEVY-VOLT-CHARGER.h

@@ -1,5 +1,5 @@
-#ifndef CHEVYVOLT_H
+#ifndef CHEVYVOLT_CHARGER_H
-#define CHEVYVOLT_H
+#define CHEVYVOLT_CHARGER_H
 #include <Arduino.h>
 #include "../../USER_SETTINGS.h"
 #include "../lib/miwagner-ESP32-Arduino-CAN/ESP32CAN.h"

Software/src/charger/NISSAN-LEAF-CHARGER.cpp

@@ -0,0 +1,275 @@
+#include "NISSAN-LEAF-CHARGER.h"
+#include "../lib/miwagner-ESP32-Arduino-CAN/CAN_config.h"
+#include "../lib/miwagner-ESP32-Arduino-CAN/ESP32CAN.h"
+
+/* This implements Nissan LEAF PDM charger support. 2013-2024 Gen2/3 PDMs are supported
+ *
+ * This code is intended to facilitate standalone battery charging, 
+ * for instance for troubleshooting purposes or emergency generator usage
+ *
+ * Credits go to:
+ *   Damien Maguire (evmbw.org, https://github.com/damienmaguire/Stm32-vcu)
+ *
+ * The code functions a bit differently incase a Nissan LEAF battery is used. Almost
+ * all CAN messages are already sent from the battery in that case, so the charger
+ * implementation can focus on only controlling the charger, spoofing battery messages
+ * is not needed.
+ *
+ * Incase another battery type is used, the code ofcourse emulates a complete Nissan LEAF
+ * battery onto the CAN bus. 
+*/
+
+/* CAN cycles and timers */
+static const uint8_t interval10ms = 10;
+static const uint8_t interval100ms = 100;
+static unsigned long previousMillis10ms = 0;
+static unsigned long previousMillis100ms = 0;
+
+/* LEAF charger/battery parameters */
+enum OBC_MODES : uint8_t {
+  IDLE_OR_QC = 1,
+  FINISHED = 2,
+  CHARGING_OR_INTERRUPTED = 4,
+  IDLE1 = 8,
+  IDLE2 = 9,
+  PLUGGED_IN_WAITING_ON_TIMER
+};
+enum OBC_VOLTAGES : uint8_t { NO_SIGNAL = 0, AC110 = 1, AC230 = 2, ABNORMAL_WAVE = 3 };
+static uint16_t OBC_Charge_Power = 0;  // Actual charger output
+static uint8_t mprun100 = 0;           // Counter 0-3
+static uint8_t mprun10 = 0;            // Counter 0-3
+static uint8_t OBC_Charge_Status = IDLE_OR_QC;
+static uint8_t OBC_Status_AC_Voltage = 0;  //1=110V, 2=230V
+static uint8_t OBCpowerSetpoint = 0;
+static uint8_t OBCpower = 0;
+static bool PPStatus = false;
+static bool OBCwakeup = false;
+
+/* Voltage and current settings. Validation performed to set ceiling of 3300w vol*cur */
+extern volatile float charger_setpoint_HV_VDC;
+extern volatile float charger_setpoint_HV_IDC;
+extern volatile float charger_setpoint_HV_IDC_END;
+extern bool charger_HV_enabled;
+extern bool charger_aux12V_enabled;
+
+extern float charger_stat_HVcur;
+extern float charger_stat_HVvol;
+extern float charger_stat_ACcur;
+extern float charger_stat_ACvol;
+extern float charger_stat_LVcur;
+extern float charger_stat_LVvol;
+
+//Actual content messages
+static CAN_frame_t LEAF_1DB = {.FIR = {.B =
+                                           {
+                                               .DLC = 8,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x1DB,
+                               .data = {0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00}};
+static CAN_frame_t LEAF_1DC = {.FIR = {.B =
+                                           {
+                                               .DLC = 8,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x1DC,
+                               .data = {0x6E, 0x0A, 0x05, 0xD5, 0x00, 0x00, 0x00, 0x00}};
+static CAN_frame_t LEAF_1F2 = {.FIR = {.B =
+                                           {
+                                               .DLC = 8,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x1F2,
+                               .data = {0x30, 0x00, 0x20, 0xAC, 0x00, 0x3C, 0x00, 0x8F}};
+static CAN_frame_t LEAF_50B = {.FIR = {.B =
+                                           {
+                                               .DLC = 7,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x50B,
+                               .data = {0x00, 0x00, 0x06, 0xC0, 0x00, 0x00, 0x00}};
+static CAN_frame_t LEAF_55B = {.FIR = {.B =
+                                           {
+                                               .DLC = 8,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x55B,
+                               .data = {0xA4, 0x40, 0xAA, 0x00, 0xDF, 0xC0, 0x10, 0x00}};
+static CAN_frame_t LEAF_5BC = {.FIR = {.B =
+                                           {
+                                               .DLC = 8,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x5BC,
+                               .data = {0x3D, 0x80, 0xF0, 0x64, 0xB0, 0x01, 0x00, 0x32}};
+
+static CAN_frame_t LEAF_59E = {.FIR = {.B =
+                                           {
+                                               .DLC = 8,
+                                               .FF = CAN_frame_std,
+                                           }},
+                               .MsgID = 0x59E,
+                               .data = {0x00, 0x00, 0x0C, 0x76, 0x18, 0x00, 0x00, 0x00}};
+
+static uint8_t crctable[256] = {
+    0,   133, 143, 10,  155, 30,  20,  145, 179, 54,  60,  185, 40,  173, 167, 34,  227, 102, 108, 233, 120, 253,
+    247, 114, 80,  213, 223, 90,  203, 78,  68,  193, 67,  198, 204, 73,  216, 93,  87,  210, 240, 117, 127, 250,
+    107, 238, 228, 97,  160, 37,  47,  170, 59,  190, 180, 49,  19,  150, 156, 25,  136, 13,  7,   130, 134, 3,
+    9,   140, 29,  152, 146, 23,  53,  176, 186, 63,  174, 43,  33,  164, 101, 224, 234, 111, 254, 123, 113, 244,
+    214, 83,  89,  220, 77,  200, 194, 71,  197, 64,  74,  207, 94,  219, 209, 84,  118, 243, 249, 124, 237, 104,
+    98,  231, 38,  163, 169, 44,  189, 56,  50,  183, 149, 16,  26,  159, 14,  139, 129, 4,   137, 12,  6,   131,
+    18,  151, 157, 24,  58,  191, 181, 48,  161, 36,  46,  171, 106, 239, 229, 96,  241, 116, 126, 251, 217, 92,
+    86,  211, 66,  199, 205, 72,  202, 79,  69,  192, 81,  212, 222, 91,  121, 252, 246, 115, 226, 103, 109, 232,
+    41,  172, 166, 35,  178, 55,  61,  184, 154, 31,  21,  144, 1,   132, 142, 11,  15,  138, 128, 5,   148, 17,
+    27,  158, 188, 57,  51,  182, 39,  162, 168, 45,  236, 105, 99,  230, 119, 242, 248, 125, 95,  218, 208, 85,
+    196, 65,  75,  206, 76,  201, 195, 70,  215, 82,  88,  221, 255, 122, 112, 245, 100, 225, 235, 110, 175, 42,
+    32,  165, 52,  177, 187, 62,  28,  153, 147, 22,  135, 2,   8,   141};
+
+static uint8_t calculate_CRC_Nissan(CAN_frame_t* frame) {
+  uint8_t crc = 0;
+  for (uint8_t j = 0; j < 7; j++) {
+    crc = crctable[(crc ^ static_cast<uint8_t>(frame->data.u8[j])) % 256];
+  }
+  return crc;
+}
+
+static uint8_t calculate_checksum_nibble(CAN_frame_t* frame) {
+  uint8_t sum = 0;
+  for (uint8_t i = 0; i < 7; i++) {
+    sum += frame->data.u8[i] >> 4;
+    sum += frame->data.u8[i] & 0xF;
+  }
+  sum = (sum + 2) & 0xF;
+  return sum;
+}
+
+void receive_can_nissanleaf_charger(CAN_frame_t rx_frame) {
+
+  switch (rx_frame.MsgID) {
+    case 0x679:  // This message fires once when charging cable is plugged in
+      OBCwakeup = true;
+      charger_aux12V_enabled = true;  //Not possible to turn off 12V charging
+      // Startout with default values, so that charging can begin right when user plugs in cable
+      charger_HV_enabled = true;
+      charger_setpoint_HV_IDC = 16;   // Ampere
+      charger_setpoint_HV_VDC = 400;  // Target voltage
+      break;
+    case 0x390:
+      OBC_Charge_Status = ((rx_frame.data.u8[5] & 0x7E) >> 1);
+      if (OBC_Charge_Status == PLUGGED_IN_WAITING_ON_TIMER || CHARGING_OR_INTERRUPTED) {
+        PPStatus = true;  //plug inserted
+      } else {
+        PPStatus = false;  //plug not inserted
+      }
+      OBC_Status_AC_Voltage = ((rx_frame.data.u8[3] & 0x18) >> 3);
+      if (OBC_Status_AC_Voltage == AC110) {
+        charger_stat_ACvol = 110;
+      }
+      if (OBC_Status_AC_Voltage == AC230) {
+        charger_stat_ACvol = 230;
+      }
+      if (OBC_Status_AC_Voltage == ABNORMAL_WAVE) {
+        charger_stat_ACvol = 1;
+      }
+
+      OBC_Charge_Power = ((rx_frame.data.u8[0] & 0x01) << 8) | (rx_frame.data.u8[1]);
+      charger_stat_HVcur = OBC_Charge_Power;
+      break;
+    default:
+      break;
+  }
+}
+
+void send_can_nissanleaf_charger() {
+  unsigned long currentMillis = millis();
+
+  /* Send keepalive with mode every 10ms */
+  if (currentMillis - previousMillis10ms >= interval10ms) {
+    previousMillis10ms = currentMillis;
+
+    mprun10++;
+    if (mprun10 >= 4)
+      mprun10 = 0;
+
+/* 1DB is the main control message. If LEAF battery is used, the battery controls almost everything */
+// Only send these messages if Nissan LEAF battery is not used
+#ifndef NISSAN_LEAF_BATTERY
+
+    // VCM message, containing info if battery should sleep or stay awake
+    ESP32Can.CANWriteFrame(&LEAF_50B);  // HCM_WakeUpSleepCommand == 11b == WakeUp, and CANMASK = 1
+
+    LEAF_1DB.data.u8[7] = calculate_CRC_Nissan(&LEAF_1DB);
+    ESP32Can.CANWriteFrame(&LEAF_1DB);
+
+    LEAF_1DC.data.u8[7] = calculate_CRC_Nissan(&LEAF_1DC);
+    ESP32Can.CANWriteFrame(&LEAF_1DC);
+#endif
+
+    OBCpowerSetpoint = ((charger_setpoint_HV_IDC * 4) + 0x64);
+
+    // convert power setpoint to PDM format:
+    //    0xA0 = 15A (60x)
+    //    0x70 = 3 amps ish (12x)
+    //    0x6a = 1.4A (6x)
+    //    0x66 = 0.5A (2x)
+    //    0x65 = 0.3A (1x)
+    //    0x64 = no chg
+    //    so 0x64=100. 0xA0=160. so 60 decimal steps. 1 step=100W???
+
+    // This line controls if power should flow or not
+    if (PPStatus &&
+        charger_HV_enabled) {  //Charging starts when cable plugged in and User has requested charging to start via WebUI
+      // clamp min and max values
+      if (OBCpowerSetpoint > 0xA0) {  //15A TODO, raise once cofirmed how to map bits into frame0 and frame1
+        OBCpowerSetpoint = 0xA0;
+      } else if (OBCpowerSetpoint <= 0x64) {
+        OBCpowerSetpoint = 0x64;  // 100W? stuck at 100 in drive mode (no charging)
+      }
+
+      // if actual battery_voltage is less than setpoint got to max power set from web ui
+      if (battery_voltage < (CHARGER_SET_HV * 10)) {  //battery_voltage = V+1,  0-500.0 (0-5000)
+        OBCpower = OBCpowerSetpoint;
+      }
+
+      // decrement charger power if volt setpoint is reached
+      if (battery_voltage >= (CHARGER_SET_HV * 10)) {
+        if (OBCpower > 0x64) {
+          OBCpower--;
+        }
+      }
+    } else {
+      // set power to 0 if charge control is set to off or not in charge mode
+      OBCpower = 0x64;
+    }
+
+    LEAF_1F2.data.u8[1] = OBCpower;
+    LEAF_1F2.data.u8[6] = mprun10;
+    LEAF_1F2.data.u8[7] = calculate_checksum_nibble(&LEAF_1F2);
+
+    ESP32Can.CANWriteFrame(
+        &LEAF_1F2);  // Sending of 1F2 message is halted in LEAF-BATTERY function incase charger is used!
+  }
+
+  /* Send messages every 100ms here */
+  if (currentMillis - previousMillis100ms >= interval100ms) {
+    previousMillis100ms = currentMillis;
+
+    mprun100++;
+    if (mprun100 > 3) {
+      mprun100 = 0;
+    }
+
+// Only send these messages if Nissan LEAF battery is not used
+#ifndef NISSAN_LEAF_BATTERY
+
+    LEAF_55B.data.u8[6] = ((0x1 << 4) | (mprun100));
+
+    LEAF_55B.data.u8[7] = calculate_CRC_Nissan(&LEAF_55B);
+    ESP32Can.CANWriteFrame(&LEAF_55B);
+
+    ESP32Can.CANWriteFrame(&LEAF_59E);
+
+    ESP32Can.CANWriteFrame(&LEAF_5BC);
+#endif
+  }
+}

Software/src/charger/NISSAN-LEAF-CHARGER.h

@@ -0,0 +1,12 @@
+#ifndef NISSANLEAF_CHARGER_H
+#define NISSANLEAF_CHARGER_H
+#include <Arduino.h>
+#include "../../USER_SETTINGS.h"
+#include "../lib/miwagner-ESP32-Arduino-CAN/ESP32CAN.h"
+
+extern uint16_t battery_voltage;  //V+1,  0-500.0 (0-5000)
+
+void send_can_nissanleaf_charger();
+void receive_can_nissanleaf_charger(CAN_frame_t rx_frame);
+
+#endif

Software/src/devboard/webserver/webserver.cpp

@@ -65,6 +65,11 @@ void init_webserver() {
   server.on("/settings", HTTP_GET,
             [](AsyncWebServerRequest* request) { request->send_P(200, "text/html", index_html, settings_processor); });
 
+  // Route for going to cellmonitor web page
+  server.on("/cellmonitor", HTTP_GET, [](AsyncWebServerRequest* request) {
+    request->send_P(200, "text/html", index_html, cellmonitor_processor);
+  });
+
   // Route for editing Wh
   server.on("/updateBatterySize", HTTP_GET, [](AsyncWebServerRequest* request) {
     if (request->hasParam("value")) {
@@ -125,7 +130,23 @@ void init_webserver() {
     }
   });
 
-#ifdef CHEVYVOLT_CHARGER
+#ifdef TEST_FAKE_BATTERY
+  // Route for editing FakeBatteryVoltage
+  server.on("/updateFakeBatteryVoltage", HTTP_GET, [](AsyncWebServerRequest* request) {
+    if (!request->hasParam("value")) {
+      request->send(400, "text/plain", "Bad Request");
+    }
+
+    String value = request->getParam("value")->value();
+    float val = value.toFloat();
+
+    battery_voltage = val * 10;
+
+    request->send(200, "text/plain", "Updated successfully");
+  });
+#endif
+
+#if defined CHEVYVOLT_CHARGER || defined NISSANLEAF_CHARGER
   // Route for editing ChargerTargetV
   server.on("/updateChargeSetpointV", HTTP_GET, [](AsyncWebServerRequest* request) {
     if (!request->hasParam("value")) {
@@ -414,10 +435,13 @@ String processor(const String& var) {
 #endif
     content += "</h4>";
 
-#ifdef CHEVYVOLT_CHARGER
+#if defined CHEVYVOLT_CHARGER || defined NISSANLEAF_CHARGER
     content += "<h4 style='color: white;'>Charger protocol: ";
 #ifdef CHEVYVOLT_CHARGER
     content += "Chevy Volt Gen1 Charger";
+#endif
+#ifdef NISSANLEAF_CHARGER
+    content += "Nissan LEAF 2013-2024 PDM charger";
 #endif
     content += "</h4>";
 #endif
@@ -515,7 +539,13 @@ String processor(const String& var) {
       content += "<span style='color: red;'>&#10005;</span></h4>";
     }
 
-#ifdef CHEVYVOLT_CHARGER
+    // Close the block
+    content += "</div>";
+
+#if defined CHEVYVOLT_CHARGER || defined NISSANLEAF_CHARGER
+    // Start a new block with orange background color
+    content += "<div style='background-color: #FF6E00; padding: 10px; margin-bottom: 10px;border-radius: 50px'>";
+
     content += "<h4>Charger HV Enabled: ";
     if (charger_HV_enabled) {
       content += "<span>&#10003;</span>";
@@ -531,6 +561,7 @@ String processor(const String& var) {
       content += "<span style='color: red;'>&#10005;</span>";
     }
     content += "</h4>";
+#ifdef CHEVYVOLT_CHARGER
     float chgPwrDC = static_cast<float>(charger_stat_HVcur * charger_stat_HVvol);
     float chgPwrAC = static_cast<float>(charger_stat_ACcur * charger_stat_ACvol);
     float chgEff = chgPwrDC / chgPwrAC * 100;
@@ -543,24 +574,40 @@ String processor(const String& var) {
 
     content += formatPowerValue("Charger Output Power", chgPwrDC, "", 1);
     content += "<h4 style='color: white;'>Charger Efficiency: " + String(chgEff) + "%</h4>";
-    content += "<h4 style='color: white;'>Charger HVDC Output V: " + String(HVvol, 2) + "</h4>";
+    content += "<h4 style='color: white;'>Charger HVDC Output V: " + String(HVvol, 2) + " V</h4>";
-    content += "<h4 style='color: white;'>Charger HVDC Output I: " + String(HVcur, 2) + "</h4>";
+    content += "<h4 style='color: white;'>Charger HVDC Output I: " + String(HVcur, 2) + " A</h4>";
     content += "<h4 style='color: white;'>Charger LVDC Output I: " + String(LVcur, 2) + "</h4>";
     content += "<h4 style='color: white;'>Charger LVDC Output V: " + String(LVvol, 2) + "</h4>";
     content += "<h4 style='color: white;'>Charger AC Input V: " + String(ACvol, 2) + " VAC</h4>";
-    content += "<h4 style='color: white;'>Charger AC Input I: " + String(ACvol, 2) + "VAC</h4>";
+    content += "<h4 style='color: white;'>Charger AC Input I: " + String(ACcur, 2) + " A</h4>";
 #endif
+#ifdef NISSANLEAF_CHARGER
+    float chgPwrDC = static_cast<float>(charger_stat_HVcur * 100);
+    charger_stat_HVcur = chgPwrDC / (battery_voltage / 10);  // P/U=I
+    charger_stat_HVvol = static_cast<float>(battery_voltage / 10);
+    float ACvol = charger_stat_ACvol;
+    float HVvol = charger_stat_HVvol;
+    float HVcur = charger_stat_HVcur;
 
+    content += formatPowerValue("Charger Output Power", chgPwrDC, "", 1);
+    content += "<h4 style='color: white;'>Charger HVDC Output V: " + String(HVvol, 2) + " V</h4>";
+    content += "<h4 style='color: white;'>Charger HVDC Output I: " + String(HVcur, 2) + " A</h4>";
+    content += "<h4 style='color: white;'>Charger AC Input V: " + String(ACvol, 2) + " VAC</h4>";
+#endif
     // Close the block
     content += "</div>";
+#endif
 
     content += "<button onclick='goToUpdatePage()'>Perform OTA update</button>";
     content += " ";
-    content += "<button onclick='goToSettingsPage()'>Change Battery Settings</button>";
+    content += "<button onclick='goToSettingsPage()'>Change Settings</button>";
+    content += " ";
+    content += "<button onclick='goToCellmonitorPage()'>Cellmonitor</button>";
     content += " ";
     content += "<button onclick='promptToReboot()'>Reboot Emulator</button>";
     content += "<script>";
     content += "function goToUpdatePage() { window.location.href = '/update'; }";
+    content += "function goToCellmonitorPage() { window.location.href = '/cellmonitor'; }";
     content += "function goToSettingsPage() { window.location.href = '/settings'; }";
     content +=
         "function promptToReboot() { if (window.confirm('Are you sure you want to reboot the emulator? NOTE: If "
@@ -605,7 +652,25 @@ String settings_processor(const String& var) {
                " A </span> <button onclick='editMaxChargeA()'>Edit</button></h4>";
     content += "<h4 style='color: white;'>Max discharge speed: " + String(MAXDISCHARGEAMP / 10.0, 1) +
                " A </span> <button onclick='editMaxDischargeA()'>Edit</button></h4>";
-#ifdef CHEVYVOLT_CHARGER
+    // Close the block
+    content += "</div>";
+
+#ifdef TEST_FAKE_BATTERY
+    // Start a new block with blue background color
+    content += "<div style='background-color: #2E37AD; padding: 10px; margin-bottom: 10px;border-radius: 50px'>";
+    float voltageFloat = static_cast<float>(battery_voltage) / 10.0;  // Convert to float and divide by 10
+    content += "<h4 style='color: white;'>Fake battery voltage: " + String(voltageFloat, 1) +
+               " V </span> <button onclick='editFakeBatteryVoltage()'>Edit</button></h4>";
+
+    // Close the block
+    content += "</div>";
+#endif
+
+#if defined CHEVYVOLT_CHARGER || defined NISSANLEAF_CHARGER
+
+    // Start a new block with orange background color
+    content += "<div style='background-color: #FF6E00; padding: 10px; margin-bottom: 10px;border-radius: 50px'>";
+
     content += "<h4 style='color: white;'>Charger HVDC Enabled: ";
     if (charger_HV_enabled) {
       content += "<span>&#10003;</span>";
@@ -626,6 +691,9 @@ String settings_processor(const String& var) {
                " V </span> <button onclick='editChargerSetpointVDC()'>Edit</button></h4>";
     content += "<h4 style='color: white;'>Charger Current Setpoint: " + String(charger_setpoint_HV_IDC, 1) +
                " A </span> <button onclick='editChargerSetpointIDC()'>Edit</button></h4>";
+
+    // Close the block
+    content += "</div>";
 #endif
 
     content += "<script>";
@@ -698,7 +766,22 @@ String settings_processor(const String& var) {
     content += "}";
     content += "}";
 
-#ifdef CHEVYVOLT_CHARGER
+#ifdef TEST_FAKE_BATTERY
+    content += "function editFakeBatteryVoltage() {";
+    content += "  var value = prompt('Enter new fake battery voltage');";
+    content += "if (value !== null) {";
+    content += "  if (value >= 0 && value <= 5000) {";
+    content += "    var xhr = new XMLHttpRequest();";
+    content += "    xhr.open('GET', '/updateFakeBatteryVoltage?value=' + value, true);";
+    content += "    xhr.send();";
+    content += "  } else {";
+    content += "    alert('Invalid value. Please enter a value between 0 and 1000');";
+    content += "  }";
+    content += "}";
+    content += "}";
+#endif
+
+#if defined CHEVYVOLT_CHARGER || defined NISSANLEAF_CHARGER
     content += "function editChargerHVDCEnabled() {";
     content += "  var value = prompt('Enable or disable HV DC output. Enter 1 for enabled, 0 for disabled');";
     content += "  if (value !== null) {";
@@ -774,6 +857,57 @@ String settings_processor(const String& var) {
 #endif
     content += "</script>";
 
+    content += "<button onclick='goToMainPage()'>Back to main page</button>";
+    content += "<script>";
+    content += "function goToMainPage() { window.location.href = '/'; }";
+    content += "</script>";
+    return content;
+  }
+  return String();
+}
+
+String cellmonitor_processor(const String& var) {
+  if (var == "PLACEHOLDER") {
+    String content = "";
+    // Page format
+    content += "<style>";
+    content += "body { background-color: black; color: white; }";
+    content += ".container { display: flex; flex-wrap: wrap; justify-content: space-around; }";
+    content += ".cell { width: 48%; margin: 1%; padding: 10px; border: 1px solid white; text-align: center; }";
+    content += ".low-voltage { color: red; }";              // Style for low voltage text
+    content += ".voltage-values { margin-bottom: 10px; }";  // Style for voltage values section
+    content += "</style>";
+
+    // Start a new block with a specific background color
+    content += "<div style='background-color: #303E47; padding: 10px; margin-bottom: 10px; border-radius: 50px'>";
+
+    // Display max, min, and deviation voltage values
+    content += "<div class='voltage-values'>";
+    content += "Max Voltage: " + String(cell_max_voltage) + " mV<br>";
+    content += "Min Voltage: " + String(cell_min_voltage) + " mV<br>";
+    int deviation = cell_max_voltage - cell_min_voltage;
+    content += "Voltage Deviation: " + String(deviation) + " mV";
+    content += "</div>";
+
+    // Visualize the populated cells in forward order using flexbox with conditional text color
+    content += "<div class='container'>";
+    for (int i = 0; i < 120; ++i) {
+      // Skip empty values
+      if (cellvoltages[i] == 0) {
+        continue;
+      }
+
+      String cellContent = "Cell " + String(i + 1) + "<br>" + String(cellvoltages[i]) + " mV";
+
+      // Check if the cell voltage is below 3000, apply red color
+      if (cellvoltages[i] < 3000) {
+        cellContent = "<span class='low-voltage'>" + cellContent + "</span>";
+      }
+
+      content += "<div class='cell'>" + cellContent + "</div>";
+    }
+    content += "</div>";
+
     // Close the block
     content += "</div>";
 

Software/src/devboard/webserver/webserver.h

@@ -25,6 +25,7 @@ extern uint16_t temperature_min;   //C+1,  Goes thru convert2unsignedint16 funct
 extern uint16_t temperature_max;    //C+1,  Goes thru convert2unsignedint16 function (15.0C = 150, -15.0C =  65385)
 extern uint16_t cell_max_voltage;   //mV,   0-4350
 extern uint16_t cell_min_voltage;   //mV,   0-4350
+extern uint16_t cellvoltages[120];  //mV    0-4350 per cell
 extern uint8_t LEDcolor;            //Enum, 0-10
 extern bool batteryAllowsContactorClosing;   //Bool, 1=true, 0=false
 extern bool inverterAllowsContactorClosing;  //Bool, 1=true, 0=false
@@ -43,6 +44,9 @@ extern float charger_stat_ACvol;
 extern float charger_stat_LVcur;
 extern float charger_stat_LVvol;
 
+//LEAF charger
+extern uint16_t OBC_Charge_Power;
+
 /**
  * @brief Initialization function for the webserver.
  *
@@ -107,6 +111,15 @@ String processor(const String& var);
  */
 String settings_processor(const String& var);
 
+/**
+ * @brief Replaces placeholder with content section in web page
+ *
+ * @param[in] var
+ *
+ * @return String
+ */
+String cellmonitor_processor(const String& var);
+
 /**
  * @brief Executes on OTA start 
  *