Version 1.2.0:

- Ticker increments clockCnt on exit (first hook call with clockCnt=0)

- Protocol startup phase closer to original:
  - id155[0] set to 0xFF on Init
  - Transition from Init to Ready after 100 ms
  - 3MW timing changed to 200 ms
  - id155[3] update coupled to 3MW switch

- Added API functions to query charger infos:
  - int getChargerTemperature();
  - float getDCConverterCurrent();
  - bool isPluggedIn();
  - bool isSwitchedOn();

API.md

@@ -97,6 +97,21 @@ Note: all control functions validate their parameters. If you pass any value out
       | `TWIZY_SERV_STOP` | Set SERV + STOP indicator + beep      |
 
 
+## Info access
+
+  - `int getChargerTemperature()` -- Get internal charger temperature
+    - result: -40 .. 100 (°C, resolution 1 °C)
+    - Hint: use this to protect the charger against over temperature by reducing the charge current
+
+  - `float getDCConverterCurrent()` -- Get DC/DC converter current level
+    - result: 0 .. 51 (A, resolution 1/5 A)
+
+  - `bool isPluggedIn()` -- Get power grid connection status
+    - result: true = 230V detected
+
+  - `bool isSwitchedOn()` -- Get key switch status
+    - result: true = key turned
+
 
 ## User callback registration
 

HISTORY.md

@@ -1,5 +1,19 @@
 # History
 
+## Version 1.2.0 (2017-07-29)
+
+- Ticker increments clockCnt on exit (first hook call with clockCnt=0)
+- Protocol startup phase closer to original:
+  - id155[0] set to 0xFF on Init
+  - Transition from Init to Ready after 100 ms
+  - 3MW timing changed to 200 ms
+  - id155[3] update coupled to 3MW switch
+- Added API functions to query charger infos:
+  - int getChargerTemperature();
+  - float getDCConverterCurrent();
+  - bool isPluggedIn();
+  - bool isSwitchedOn();
+
 
 ## Version: 1.1.0 (2017-06-20)
 

examples/BlazejBMS/BlazejBMS.ino

@@ -76,8 +76,8 @@ unsigned long error = TWIZY_OK;
 // 
 void bmsEnterState(TwizyState currentState, TwizyState newState) {
   
-  // lower soc to prevent immediate charge stop:
+  // lower SOC at switch-on to prevent immediate charge stop:
-  if (newState == Init) {
+  if (currentState == Init && newState == Ready) {
     if (soc > 99) {
       soc -= 1;
       twizy.setSOC(soc);

examples/SimpleBMS/SimpleBMS.ino

@@ -83,7 +83,7 @@ void bmsEnterState(TwizyState currentState, TwizyState newState) {
   
   // The charger will not start charging at SOC=100%, so lower a too
   // high SOC on wakeup to enable topping-off charges:
-  if (newState == Init) {
+  if (currentState == Init && newState == Ready) {
     if (soc > 99) {
       soc -= 1;
       twizy.setSOC(soc);

keywords.txt

@@ -28,6 +28,11 @@ setCurrent	KEYWORD2
 setCurrentQA	KEYWORD2
 setError	KEYWORD2
 
+getChargerTemperature	KEYWORD2
+getDCConverterCurrent	KEYWORD2
+isPluggedIn	KEYWORD2
+isSwitchedOn	KEYWORD2
+
 attachEnterState	KEYWORD2
 attachCheckState	KEYWORD2
 attachProcessCanMsg	KEYWORD2

src/TwizyVirtualBMS.h

@@ -38,7 +38,7 @@
 #ifndef _TwizyVirtualBMS_h
 #define _TwizyVirtualBMS_h
 
-#define TWIZY_VBMS_VERSION		"V1.1.0 (2017-06-20)"
+#define TWIZY_VBMS_VERSION		"V1.2.0 (2017-07-29)"
 
 #ifndef TWIZY_TAG
 #define TWIZY_TAG							"twizy."
@@ -206,6 +206,11 @@ public:
 	bool setModuleTemperature(int module, int temp);
 	bool setTemperature(int tempMin, int tempMax, bool deriveModules);
 	bool setError(unsigned long error);
+  
+  int getChargerTemperature();
+  float getDCConverterCurrent();
+  bool isPluggedIn();
+  bool isSwitchedOn();
 	
 	// State access:
 	TwizyState state() {
@@ -365,7 +370,7 @@ bool TwizyVirtualBMS::setCurrent(float amps) {
 }
 
 // Set battery pack current level (native 1/4 A resolution)
-//  milliamps: -2000 .. +2000 (positive = charge, negative = discharge)
+//  quarterAmps: -2000 .. +2000 (positive = charge, negative = discharge)
 bool TwizyVirtualBMS::setCurrentQA(long quarterAmps) {
 	CHECKLIMIT(quarterAmps, -2000L, 2000L);
 	unsigned int level = 2000 + quarterAmps;
@@ -525,6 +530,26 @@ bool TwizyVirtualBMS::setError(unsigned long error) {
 }
 
 
+// Get charger temperature
+int TwizyVirtualBMS::getChargerTemperature() {
+  return (int) id597[7] - 40;
+}
+
+// Get DC converter current
+float TwizyVirtualBMS::getDCConverterCurrent() {
+  return (float) id597[2] / 5;
+}
+
+// Get plugin status
+bool TwizyVirtualBMS::isPluggedIn() {
+  return ((id597[0] & 0x20) != 0);
+}
+
+// Get key switch status
+bool TwizyVirtualBMS::isSwitchedOn() {
+  return ((id597[1] & 0x10) != 0);
+}
+
 
 // -----------------------------------------------------
 // Twizy CAN interface
@@ -667,9 +692,6 @@ bool TwizyVirtualBMS::sendMsg(INT32U id, INT8U len, INT8U *buf) {
 
 void TwizyVirtualBMS::ticker() {
   
-  if (++clockCnt == 3000)
-    clockCnt = 0;
-  
   // Note: currently we turn off all CAN sends in state Error,
   //  as that reliably lets the SEVCON and charger switch off.
   //  It may be an option to only turn off ID 554 (or all 55x)
@@ -715,18 +737,19 @@ void TwizyVirtualBMS::ticker() {
     
     //
     // Create 3MW pulse cycle
-    // (high 150ms → low 150ms → high)
+    // (high 200ms → low 200ms → high)
     //
     
     if (counter3MW > 0) {
       --counter3MW;
-      // 3MW low after 150 ms:
+      // 3MW low after 200 ms:
-      if (counter3MW == 15) {
+      if (counter3MW == 20) {
         digitalWrite(TWIZY_3MW_CONTROL_PIN, 0);
       }
-      // 3MW high after 300 ms (pulse finished):
+      // 3MW high after 400 ms (pulse finished):
       else if (counter3MW == 0) {
         digitalWrite(TWIZY_3MW_CONTROL_PIN, 1);
+        id155[3] = 0x54;
       }
     }
     
@@ -739,6 +762,10 @@ void TwizyVirtualBMS::ticker() {
       
       // Transition to Ready?
       case Init:
+        // …from Init after first 100 ms:
+        if (clockCnt < 9) {
+          break;
+        }
       case StopDrive:
       case StopCharge:
       case StopTrickle:
@@ -791,6 +818,14 @@ void TwizyVirtualBMS::ticker() {
   if (bmsTicker) {
 		(*bmsTicker)(clockCnt);
 	}
+
+  
+  //
+  // Cyclic clock counter
+  //
+  
+  if (++clockCnt == 3000)
+    clockCnt = 0;
 }
 
 
@@ -877,6 +912,7 @@ void TwizyVirtualBMS::enterState(TwizyState newState) {
     
     case Off:
     case Init:
+      id155[0] = 0xFF;
       id155[3] = 0x94;
       id424[0] = 0x00;
       id425[0] = 0x1D;
@@ -895,11 +931,10 @@ void TwizyVirtualBMS::enterState(TwizyState newState) {
       break;
       
     case Ready:
-      // restore minimum charge current level:
+      // restore minimum charge current level after stop/init:
-      if (id155[0] == 0) {
+      if (id155[0] == 0 || id155[0] == 0xFF) {
         id155[0] = 1;
       }
-      id155[3] = 0x54;
       // keep stop charge request if set:
       if (id424[0] != 0x12) {
         id424[0] = 0x11;
@@ -909,7 +944,7 @@ void TwizyVirtualBMS::enterState(TwizyState newState) {
       if (digitalRead(TWIZY_3MW_CONTROL_PIN) == 0) {
         // ...start 3MW pulse cycle:
         digitalWrite(TWIZY_3MW_CONTROL_PIN, 1);
-        counter3MW = 30;
+        counter3MW = 40;
       }
       break;