From e95b70efebbba8622194211244fd6647d4c614df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20B=C3=B6hm?= <andreas@boehm.cx>
Date: Fri, 26 Jul 2024 20:37:40 +0200
Subject: [PATCH] Feature: expose 'full solar passsthrough active' via MQTT
 (#1136)

---
 include/MqttHandlePowerLimiterHass.h |  1 +
 include/PowerLimiter.h               |  1 +
 src/MqttHandlePowerLimiter.cpp       |  1 +
 src/MqttHandlePowerLimiterHass.cpp   | 45 ++++++++++++++++++++++++++++
 4 files changed, 48 insertions(+)

diff --git a/include/MqttHandlePowerLimiterHass.h b/include/MqttHandlePowerLimiterHass.h
index 283f8ad8b..45bd80299 100644
--- a/include/MqttHandlePowerLimiterHass.h
+++ b/include/MqttHandlePowerLimiterHass.h
@@ -15,6 +15,7 @@ class MqttHandlePowerLimiterHassClass {
     void publish(const String& subtopic, const String& payload);
     void publishNumber(const char* caption, const char* icon, const char* category, const char* commandTopic, const char* stateTopic, const char* unitOfMeasure, const int16_t min, const int16_t max, const float step);
     void publishSelect(const char* caption, const char* icon, const char* category, const char* commandTopic, const char* stateTopic);
+    void publishBinarySensor(const char* caption, const char* icon, const char* stateTopic, const char* payload_on, const char* payload_off);
     void createDeviceInfo(JsonDocument& root);
 
     Task _loopTask;
diff --git a/include/PowerLimiter.h b/include/PowerLimiter.h
index c5727fe5c..8da2628f9 100644
--- a/include/PowerLimiter.h
+++ b/include/PowerLimiter.h
@@ -44,6 +44,7 @@ class PowerLimiterClass {
     uint8_t getInverterUpdateTimeouts() const { return _inverterUpdateTimeouts; }
     uint8_t getPowerLimiterState();
     int32_t getLastRequestedPowerLimit() { return _lastRequestedPowerLimit; }
+    bool getFullSolarPassThroughEnabled() const { return _fullSolarPassThroughEnabled; }
 
     enum class Mode : unsigned {
         Normal = 0,
diff --git a/src/MqttHandlePowerLimiter.cpp b/src/MqttHandlePowerLimiter.cpp
index bb3dd00a8..f01a9b146 100644
--- a/src/MqttHandlePowerLimiter.cpp
+++ b/src/MqttHandlePowerLimiter.cpp
@@ -91,6 +91,7 @@ void MqttHandlePowerLimiterClass::loop()
     MqttSettings.publish("powerlimiter/status/threshold/voltage/stop", String(config.PowerLimiter.VoltageStopThreshold));
 
     if (config.Vedirect.Enabled) {
+        MqttSettings.publish("powerlimiter/status/full_solar_passthrough_active", String(PowerLimiter.getFullSolarPassThroughEnabled()));
         MqttSettings.publish("powerlimiter/status/threshold/voltage/full_solar_passthrough_start", String(config.PowerLimiter.FullSolarPassThroughStartVoltage));
         MqttSettings.publish("powerlimiter/status/threshold/voltage/full_solar_passthrough_stop", String(config.PowerLimiter.FullSolarPassThroughStopVoltage));
     }
diff --git a/src/MqttHandlePowerLimiterHass.cpp b/src/MqttHandlePowerLimiterHass.cpp
index 66c8566d1..e5706cd85 100644
--- a/src/MqttHandlePowerLimiterHass.cpp
+++ b/src/MqttHandlePowerLimiterHass.cpp
@@ -75,6 +75,10 @@ void MqttHandlePowerLimiterHassClass::publishConfig()
             "config", "threshold/voltage/stop", "threshold/voltage/stop", "V", 16, 60, 0.1);
 
     if (config.Vedirect.Enabled) {
+        publishBinarySensor("full solar passthrough active",
+            "mdi:transmission-tower-import",
+            "full_solar_passthrough_active", "1", "0");
+
         publishNumber("DPL full solar passthrough start voltage",
                 "mdi:transmission-tower-import", "config",
                 "threshold/voltage/full_solar_passthrough_start",
@@ -187,6 +191,47 @@ void MqttHandlePowerLimiterHassClass::publishNumber(
     publish(configTopic, buffer);
 }
 
+void MqttHandlePowerLimiterHassClass::publishBinarySensor(
+    const char* caption, const char* icon,
+    const char* stateTopic, const char* payload_on, const char* payload_off)
+{
+
+    String numberId = caption;
+    numberId.replace(" ", "_");
+    numberId.toLowerCase();
+
+    const String configTopic = "binary_sensor/" + MqttHandleHass.getDtuUniqueId() + "/" + numberId + "/config";
+
+    const String statTopic = MqttSettings.getPrefix() + "powerlimiter/status/" + stateTopic;
+
+    JsonDocument root;
+
+    root["name"] = caption;
+    root["uniq_id"] = MqttHandleHass.getDtuUniqueId() + "_" + numberId;
+    if (strcmp(icon, "")) {
+        root["ic"] = icon;
+    }
+    root["stat_t"] = statTopic;
+    root["pl_on"] = payload_on;
+    root["pl_off"] = payload_off;
+
+    auto const& config = Configuration.get();
+    if (config.Mqtt.Hass.Expire) {
+        root["exp_aft"] = config.Mqtt.PublishInterval * 3;
+    }
+
+    createDeviceInfo(root);
+
+    if (!Utils::checkJsonAlloc(root, __FUNCTION__, __LINE__)) {
+        return;
+    }
+
+    String buffer;
+    serializeJson(root, buffer);
+    publish(configTopic, buffer);
+}
+
+
 void MqttHandlePowerLimiterHassClass::createDeviceInfo(JsonDocument& root)
 {
     JsonObject object = root["dev"].to<JsonObject>();