replace VICTRON_MAX_COUNT

determine the amount of controllers actually in use dynamically,
especially to avoid indices which are invalid, causing an error
to be printed, even though the user did not do anything wrong.

include/Configuration.h

@@ -30,8 +30,6 @@
 
 #define DEV_MAX_MAPPING_NAME_STRLEN 63
 
-#define VICTRON_MAX_COUNT 2
-
 #define POWERMETER_MAX_PHASES 3
 #define POWERMETER_MAX_HTTP_URL_STRLEN 1024
 #define POWERMETER_MAX_USERNAME_STRLEN 64

include/VictronMppt.h

@@ -24,6 +24,7 @@ class VictronMpptClass {
     uint32_t getDataAgeMillis() const;
     uint32_t getDataAgeMillis(size_t idx) const;
 
+    size_t controllerAmount() const { return _controllers.size(); }
     std::optional<VeDirectMpptController::spData_t> getData(size_t idx = 0) const;
 
     // total output of all MPPT charge controllers in Watts

include/WebApi_ws_vedirect_live.h

@@ -25,7 +25,7 @@ class WebApiWsVedirectLiveClass {
 
     uint32_t _lastFullPublish = 0;
     uint32_t _lastPublish = 0;
-    static constexpr uint16_t _responseSize = VICTRON_MAX_COUNT * (1024 + 128);
+    uint16_t responseSize() const;
 
     std::mutex _mutex;
 

src/MqttHandlVedirectHass.cpp

@@ -57,7 +57,7 @@ void MqttHandleVedirectHassClass::publishConfig()
     }
 
     // device info
-    for (int idx = 0; idx < VICTRON_MAX_COUNT; ++idx) {
+    for (int idx = 0; idx < VictronMppt.controllerAmount(); ++idx) {
         // ensure data is received from victron
         if (!VictronMppt.isDataValid(idx)) {
             continue;

src/MqttHandleVedirect.cpp

@@ -58,7 +58,7 @@ void MqttHandleVedirectClass::loop()
         }
         #endif
 
-        for (int idx = 0; idx < VICTRON_MAX_COUNT; ++idx) {
+        for (int idx = 0; idx < VictronMppt.controllerAmount(); ++idx) {
             if (!VictronMppt.isDataValid(idx)) {
                 continue;
             }

src/WebApi_ws_vedirect_live.cpp

@@ -60,6 +60,11 @@ bool WebApiWsVedirectLiveClass::hasUpdate(size_t idx)
     return dataAgeMillis < publishAgeMillis;
 }
 
+uint16_t WebApiWsVedirectLiveClass::responseSize() const
+{
+    return VictronMppt.controllerAmount() * (1024 + 128);
+}
+
 void WebApiWsVedirectLiveClass::sendDataTaskCb()
 {
     // do nothing if no WS client is connected
@@ -69,7 +74,7 @@ void WebApiWsVedirectLiveClass::sendDataTaskCb()
     bool fullUpdate = (millis() - _lastFullPublish > (10 * 1000));
     bool updateAvailable = false;
     if (!fullUpdate) {
-        for (int idx = 0; idx < VICTRON_MAX_COUNT; ++idx) {
+        for (size_t idx = 0; idx < VictronMppt.controllerAmount(); ++idx) {
             if (hasUpdate(idx)) {
                 updateAvailable = true;
                 break;
@@ -80,7 +85,7 @@ void WebApiWsVedirectLiveClass::sendDataTaskCb()
     if (fullUpdate || updateAvailable) {
         try {
             std::lock_guard<std::mutex> lock(_mutex);
-            DynamicJsonDocument root(_responseSize);
+            DynamicJsonDocument root(responseSize());
             if (Utils::checkJsonAlloc(root, __FUNCTION__, __LINE__)) {
                 JsonVariant var = root;
                 generateJsonResponse(var, fullUpdate);
@@ -114,7 +119,7 @@ void WebApiWsVedirectLiveClass::generateJsonResponse(JsonVariant& root, bool ful
     const JsonObject &array = root["vedirect"].createNestedObject("instances");
     root["vedirect"]["full_update"] = fullUpdate;
 
-    for (int idx = 0; idx < VICTRON_MAX_COUNT; ++idx) {
+    for (size_t idx = 0; idx < VictronMppt.controllerAmount(); ++idx) {
         std::optional<VeDirectMpptController::spData_t> spOptMpptData = VictronMppt.getData(idx);
         if (!spOptMpptData.has_value()) {
             continue;
@@ -213,7 +218,7 @@ void WebApiWsVedirectLiveClass::onLivedataStatus(AsyncWebServerRequest* request)
     }
     try {
         std::lock_guard<std::mutex> lock(_mutex);
-        AsyncJsonResponse* response = new AsyncJsonResponse(false, _responseSize);
+        AsyncJsonResponse* response = new AsyncJsonResponse(false, responseSize());
         auto& root = response->getRoot();
 
         generateJsonResponse(root, true/*fullUpdate*/);