Feature: Refactor/Simplify DPL settings

this changeset refactors the web application's DPL settings view. the
DPL settings can be complex, and they shall be presented in a way that
allows users to comprehend their meaning. irrelevant settings are now
hidden or displayed dynamically based on the influencing settings.

* group SoC thresholds into their own card

* hide battery SoC thresholds if battery disabled. if the user did not
  even enable the battery interface, battery SoC values will not be used
  for DPL decisions. in that case we completely hide the respective
  settings from the DPL admin view. this reduces the amount of settings
  for new users and especially users who don't even have a battery in
  their setup or have no BMS connected.

* group voltage thresholds and improve label texts

* fix load correction factor unit

* fix header (wording)

* group solar-passthrough settings in new card

* group inverter-related settings

* hide solar passthrough settings if VE.Direct is disabled. closes #662.

* completely disable form if any requirement is not met

* list available inverters by name and type. this makes it much more
  convenient to select the right inverter, especially since the order of
  the inverters in the web UI is decoupled from their position in the
  internal array, which was used to select them previously. care was
  taken that old configs select the same inverter after an update.
  however, when editing the DPL settings, the user is forced to select
  an inverter from the newly created drow-down list.

* disable form if no inverter is configured (config alert)

* make inverter input selection dynamic. adjust selection to actual
  amount of channels for selected inverter. skip selection altogether if
  inverter has only one channel, or if it is solar powered.

* web app: wording adjustments

* group meta data into new property and exclude from submission. saves
  memory when evaluating the submitted settings.

* hide irrelevant settings if inverter is solar-powered

* move restart hour setting to inverter card. translate setting which
  disabled automatic restart.

* simplify "drain strategy" setting into an on/off toggle. care was
  taken that existing configs work the same after an upgrade. the
  respective drain strategy is translated into the new setting when
  reading the config. once the config is written, the new setting is
  persisted.

* show more configuration hints, depending on actual configuration

* replace inputs by InputElement where possible

include/Configuration.h

@@ -204,11 +204,11 @@ struct CONFIG_T {
         bool VerboseLogging;
         bool SolarPassThroughEnabled;
         uint8_t SolarPassThroughLosses;
-        uint8_t BatteryDrainStategy;
+        bool BatteryAlwaysUseAtNight;
         uint32_t Interval;
         bool IsInverterBehindPowerMeter;
         bool IsInverterSolarPowered;
-        uint8_t InverterId;
+        uint64_t InverterId;
         uint8_t InverterChannelId;
         int32_t TargetPowerConsumption;
         int32_t TargetPowerConsumptionHysteresis;

include/defaults.h

@@ -119,7 +119,7 @@
 #define POWERLIMITER_ENABLED false
 #define POWERLIMITER_SOLAR_PASSTHROUGH_ENABLED true
 #define POWERLIMITER_SOLAR_PASSTHROUGH_LOSSES 3
-#define POWERLIMITER_BATTERY_DRAIN_STRATEGY 0
+#define POWERLIMITER_BATTERY_ALWAYS_USE_AT_NIGHT false
 #define POWERLIMITER_INTERVAL 10
 #define POWERLIMITER_IS_INVERTER_BEHIND_POWER_METER true
 #define POWERLIMITER_IS_INVERTER_SOLAR_POWERED false

src/Configuration.cpp

@@ -182,7 +182,7 @@ bool ConfigurationClass::write()
     powerlimiter["verbose_logging"] = config.PowerLimiter.VerboseLogging;
     powerlimiter["solar_passtrough_enabled"] = config.PowerLimiter.SolarPassThroughEnabled;
     powerlimiter["solar_passtrough_losses"] = config.PowerLimiter.SolarPassThroughLosses;
-    powerlimiter["battery_drain_strategy"] = config.PowerLimiter.BatteryDrainStategy;
+    powerlimiter["battery_always_use_at_night"] = config.PowerLimiter.BatteryAlwaysUseAtNight;
     powerlimiter["interval"] = config.PowerLimiter.Interval;
     powerlimiter["is_inverter_behind_powermeter"] = config.PowerLimiter.IsInverterBehindPowerMeter;
     powerlimiter["is_inverter_solar_powered"] = config.PowerLimiter.IsInverterSolarPowered;
@@ -429,7 +429,8 @@ bool ConfigurationClass::read()
     config.PowerLimiter.VerboseLogging = powerlimiter["verbose_logging"] | VERBOSE_LOGGING;
     config.PowerLimiter.SolarPassThroughEnabled = powerlimiter["solar_passtrough_enabled"] | POWERLIMITER_SOLAR_PASSTHROUGH_ENABLED;
     config.PowerLimiter.SolarPassThroughLosses = powerlimiter["solar_passthrough_losses"] | POWERLIMITER_SOLAR_PASSTHROUGH_LOSSES;
-    config.PowerLimiter.BatteryDrainStategy = powerlimiter["battery_drain_strategy"] | POWERLIMITER_BATTERY_DRAIN_STRATEGY;
+    config.PowerLimiter.BatteryAlwaysUseAtNight = powerlimiter["battery_always_use_at_night"] | POWERLIMITER_BATTERY_ALWAYS_USE_AT_NIGHT;
+    if (powerlimiter["battery_drain_strategy"] == 1) { config.PowerLimiter.BatteryAlwaysUseAtNight = true; } // convert legacy setting
     config.PowerLimiter.Interval =  powerlimiter["interval"] | POWERLIMITER_INTERVAL;
     config.PowerLimiter.IsInverterBehindPowerMeter = powerlimiter["is_inverter_behind_powermeter"] | POWERLIMITER_IS_INVERTER_BEHIND_POWER_METER;
     config.PowerLimiter.IsInverterSolarPowered = powerlimiter["is_inverter_solar_powered"] | POWERLIMITER_IS_INVERTER_SOLAR_POWERED;

src/Huawei_can.cpp

@@ -325,7 +325,13 @@ void HuaweiCanClass::loop()
 
     // Check if inverter used by the power limiter is active
     std::shared_ptr<InverterAbstract> inverter =
-        Hoymiles.getInverterByPos(config.PowerLimiter.InverterId);
+        Hoymiles.getInverterBySerial(config.PowerLimiter.InverterId);
+
+    if (inverter == nullptr) {
+        // we previously had an index saved as InverterId. fall back to the
+        // respective positional lookup if InverterId is not a known serial.
+        inverter = Hoymiles.getInverterByPos(config.PowerLimiter.InverterId);
+    }
 
     if (inverter != nullptr) {
         if(inverter->isProducing()) {

src/PowerLimiter.cpp

@@ -137,7 +137,13 @@ void PowerLimiterClass::loop()
     }
 
     std::shared_ptr<InverterAbstract> currentInverter =
-        Hoymiles.getInverterByPos(config.PowerLimiter.InverterId);
+        Hoymiles.getInverterBySerial(config.PowerLimiter.InverterId);
+
+    if (currentInverter == nullptr) {
+        // we previously had an index saved as InverterId. fall back to the
+        // respective positional lookup if InverterId is not a known serial.
+        currentInverter = Hoymiles.getInverterByPos(config.PowerLimiter.InverterId);
+    }
 
     // in case of (newly) broken configuration, shut down
     // the last inverter we worked with (if any)
@@ -242,14 +248,14 @@ void PowerLimiterClass::loop()
 
         if (isStartThresholdReached()) { return true; }
 
-        // with solar passthrough, and the respective drain strategy, we
+        // with solar passthrough, and the respective switch enabled, we
         // may start discharging the battery when it is nighttime. we also
         // stop the discharge cycle if it becomes daytime again.
         // TODO(schlimmchen): should be supported by sunrise and sunset, such
         // that a thunderstorm or other events that drastically lower the solar
         // power do not cause the start of a discharge cycle during the day.
         if (config.PowerLimiter.SolarPassThroughEnabled &&
-                config.PowerLimiter.BatteryDrainStategy == EMPTY_AT_NIGHT) {
+                config.PowerLimiter.BatteryAlwaysUseAtNight) {
             return getSolarPower() == 0;
         }
 
@@ -287,10 +293,10 @@ void PowerLimiterClass::loop()
                 (isStopThresholdReached()?"yes":"no"),
                 (_inverter->isProducing()?"is":"is NOT"));
 
-        MessageOutput.printf("[DPL::loop] battery discharging %s, SolarPT %s, Drain Strategy: %i\r\n",
+        MessageOutput.printf("[DPL::loop] battery discharging %s, SolarPT %s, use at night: %i\r\n",
                 (_batteryDischargeEnabled?"allowed":"prevented"),
                 (config.PowerLimiter.SolarPassThroughEnabled?"enabled":"disabled"),
-                config.PowerLimiter.BatteryDrainStategy);
+                config.PowerLimiter.BatteryAlwaysUseAtNight);
     };
 
     if (_verboseLogging) { logging(); }

src/WebApi_powerlimiter.cpp

@@ -26,18 +26,24 @@ void WebApiPowerLimiterClass::init(AsyncWebServer& server, Scheduler& scheduler)
 
 void WebApiPowerLimiterClass::onStatus(AsyncWebServerRequest* request)
 {
-    AsyncJsonResponse* response = new AsyncJsonResponse();
+    auto const& config = Configuration.get();
+
+    size_t invAmount = 0;
+    for (uint8_t i = 0; i < INV_MAX_COUNT; i++) {
+        if (config.Inverter[i].Serial != 0) { ++invAmount; }
+    }
+
+    AsyncJsonResponse* response = new AsyncJsonResponse(false, 1024 + 384 * invAmount);
     auto& root = response->getRoot();
-    const CONFIG_T& config = Configuration.get();
 
     root["enabled"] = config.PowerLimiter.Enabled;
     root["verbose_logging"] = config.PowerLimiter.VerboseLogging;
     root["solar_passthrough_enabled"] = config.PowerLimiter.SolarPassThroughEnabled;
     root["solar_passthrough_losses"] = config.PowerLimiter.SolarPassThroughLosses;
-    root["battery_drain_strategy"] = config.PowerLimiter.BatteryDrainStategy;
+    root["battery_alway_use_at_night"] = config.PowerLimiter.BatteryAlwaysUseAtNight;
     root["is_inverter_behind_powermeter"] = config.PowerLimiter.IsInverterBehindPowerMeter;
     root["is_inverter_solar_powered"] = config.PowerLimiter.IsInverterSolarPowered;
-    root["inverter_id"] = config.PowerLimiter.InverterId;
+    root["inverter_serial"] = config.PowerLimiter.InverterId;
     root["inverter_channel_id"] = config.PowerLimiter.InverterChannelId;
     root["target_power_consumption"] = config.PowerLimiter.TargetPowerConsumption;
     root["target_power_consumption_hysteresis"] = config.PowerLimiter.TargetPowerConsumptionHysteresis;
@@ -54,6 +60,35 @@ void WebApiPowerLimiterClass::onStatus(AsyncWebServerRequest* request)
     root["full_solar_passthrough_start_voltage"] = static_cast<int>(config.PowerLimiter.FullSolarPassThroughStartVoltage * 100 + 0.5) / 100.0;
     root["full_solar_passthrough_stop_voltage"] = static_cast<int>(config.PowerLimiter.FullSolarPassThroughStopVoltage * 100 + 0.5) / 100.0;
 
+    JsonObject metadata = root.createNestedObject("metadata");
+    metadata["power_meter_enabled"] = config.PowerMeter.Enabled;
+    metadata["battery_enabled"] = config.Battery.Enabled;
+    metadata["charge_controller_enabled"] = config.Vedirect.Enabled;
+
+    JsonObject inverters = metadata.createNestedObject("inverters");
+    for (uint8_t i = 0; i < INV_MAX_COUNT; i++) {
+        if (config.Inverter[i].Serial == 0) { continue; }
+
+        // we use the integer (base 10) representation of the inverter serial,
+        // rather than the hex represenation as used when handling the inverter
+        // serial elsewhere in the web application, because in this case, the
+        // serial is actually not displayed but only used as a value/index.
+        JsonObject obj = inverters.createNestedObject(String(config.Inverter[i].Serial));
+        obj["pos"] = i;
+        obj["name"] = String(config.Inverter[i].Name);
+        obj["poll_enable"] = config.Inverter[i].Poll_Enable;
+        obj["poll_enable_night"] = config.Inverter[i].Poll_Enable_Night;
+        obj["command_enable"] = config.Inverter[i].Command_Enable;
+        obj["command_enable_night"] = config.Inverter[i].Command_Enable_Night;
+
+        obj["type"] = "Unknown";
+        auto inv = Hoymiles.getInverterBySerial(config.Inverter[i].Serial);
+        if (inv != nullptr) { obj["type"] = inv->typeName(); }
+
+        auto channels = inv->Statistics()->getChannelsByType(TYPE_DC);
+        obj["channels"] = channels.size();
+    }
+
     response->setLength();
     request->send(response);
 }
@@ -105,7 +140,7 @@ void WebApiPowerLimiterClass::onAdminPost(AsyncWebServerRequest* request)
 
     if (!(root.containsKey("enabled") 
         	&& root.containsKey("lower_power_limit")
-            && root.containsKey("inverter_id")
+            && root.containsKey("inverter_serial")
             && root.containsKey("inverter_channel_id")
             && root.containsKey("target_power_consumption")
             && root.containsKey("target_power_consumption_hysteresis")
@@ -117,34 +152,52 @@ void WebApiPowerLimiterClass::onAdminPost(AsyncWebServerRequest* request)
         return;
     }
 
+    if (root["inverter_serial"].as<String>() == "invalid") {
+        retMsg["message"] = "No inverter selected!";
+        retMsg["code"] = WebApiError::GenericValueMissing;
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
 
     CONFIG_T& config = Configuration.get();
     config.PowerLimiter.Enabled = root["enabled"].as<bool>();
     PowerLimiter.setMode(PowerLimiterClass::Mode::Normal);  // User input sets PL to normal operation
     config.PowerLimiter.VerboseLogging = root["verbose_logging"].as<bool>();
-    config.PowerLimiter.SolarPassThroughEnabled = root["solar_passthrough_enabled"].as<bool>();
-    config.PowerLimiter.SolarPassThroughLosses = root["solar_passthrough_losses"].as<uint8_t>();
-    config.PowerLimiter.BatteryDrainStategy= root["battery_drain_strategy"].as<uint8_t>();
+
+    if (config.Vedirect.Enabled) {
+        config.PowerLimiter.SolarPassThroughEnabled = root["solar_passthrough_enabled"].as<bool>();
+        config.PowerLimiter.SolarPassThroughLosses = root["solar_passthrough_losses"].as<uint8_t>();
+        config.PowerLimiter.BatteryAlwaysUseAtNight= root["battery_alway_use_at_night"].as<bool>();
+        config.PowerLimiter.FullSolarPassThroughStartVoltage = static_cast<int>(root["full_solar_passthrough_start_voltage"].as<float>() * 100) / 100.0;
+        config.PowerLimiter.FullSolarPassThroughStopVoltage = static_cast<int>(root["full_solar_passthrough_stop_voltage"].as<float>() * 100) / 100.0;
+    }
+
     config.PowerLimiter.IsInverterBehindPowerMeter = root["is_inverter_behind_powermeter"].as<bool>();
     config.PowerLimiter.IsInverterSolarPowered = root["is_inverter_solar_powered"].as<bool>();
-    config.PowerLimiter.InverterId = root["inverter_id"].as<uint8_t>();
+    config.PowerLimiter.InverterId = root["inverter_serial"].as<uint64_t>();
     config.PowerLimiter.InverterChannelId = root["inverter_channel_id"].as<uint8_t>();
     config.PowerLimiter.TargetPowerConsumption = root["target_power_consumption"].as<int32_t>();
     config.PowerLimiter.TargetPowerConsumptionHysteresis = root["target_power_consumption_hysteresis"].as<int32_t>();
     config.PowerLimiter.LowerPowerLimit = root["lower_power_limit"].as<int32_t>();
     config.PowerLimiter.UpperPowerLimit = root["upper_power_limit"].as<int32_t>();
-    config.PowerLimiter.IgnoreSoc = root["ignore_soc"].as<bool>();
-    config.PowerLimiter.BatterySocStartThreshold = root["battery_soc_start_threshold"].as<uint32_t>();
-    config.PowerLimiter.BatterySocStopThreshold = root["battery_soc_stop_threshold"].as<uint32_t>();
+
+    if (config.Battery.Enabled) {
+        config.PowerLimiter.IgnoreSoc = root["ignore_soc"].as<bool>();
+        config.PowerLimiter.BatterySocStartThreshold = root["battery_soc_start_threshold"].as<uint32_t>();
+        config.PowerLimiter.BatterySocStopThreshold = root["battery_soc_stop_threshold"].as<uint32_t>();
+        if (config.Vedirect.Enabled) {
+            config.PowerLimiter.FullSolarPassThroughSoc = root["full_solar_passthrough_soc"].as<uint32_t>();
+        }
+    }
+
     config.PowerLimiter.VoltageStartThreshold = root["voltage_start_threshold"].as<float>();
     config.PowerLimiter.VoltageStartThreshold = static_cast<int>(config.PowerLimiter.VoltageStartThreshold * 100) / 100.0;
     config.PowerLimiter.VoltageStopThreshold = root["voltage_stop_threshold"].as<float>();
     config.PowerLimiter.VoltageStopThreshold = static_cast<int>(config.PowerLimiter.VoltageStopThreshold * 100) / 100.0;
     config.PowerLimiter.VoltageLoadCorrectionFactor = root["voltage_load_correction_factor"].as<float>();
     config.PowerLimiter.RestartHour = root["inverter_restart_hour"].as<int8_t>();
-    config.PowerLimiter.FullSolarPassThroughSoc = root["full_solar_passthrough_soc"].as<uint32_t>();
-    config.PowerLimiter.FullSolarPassThroughStartVoltage = static_cast<int>(root["full_solar_passthrough_start_voltage"].as<float>() * 100) / 100.0;
-    config.PowerLimiter.FullSolarPassThroughStopVoltage = static_cast<int>(root["full_solar_passthrough_stop_voltage"].as<float>() * 100) / 100.0;
 
     WebApi.writeConfig(retMsg);