add /limit /limit/set to mqtt

docs/mqtt.md

@@ -44,6 +44,11 @@ Scheduler data:
 `<base-topic>/scheduler/set <json data>`	: set/update schedules ( data as refered from API: https://openevse.stoplight.io/docs/openevse-wifi-v4/e87e6f3f90787-batch-update-schedule )  
 `<base-topic>/scheduler/clear <id>          :`remove related event  
 
+Limit:
+`<base-topic>/limit/`    				: get limit data ([json data]  
+`<base-topic>/limit/set <json data>`	: set/update limit ( data as refered from API:https://openevse.stoplight.io/docs/openevse-wifi-v4/c410fb5e48294-set-charge-limit )
+`<base-topic>/limit/set clear`	: clear current limit
+
 Main settings:
 
 `<base-topic>/divertmode/set [1 | 2]`       : enable (1)/ disable (2) divert mode  

src/limit.h

@@ -20,7 +20,7 @@ class LimitType {
 			Soc,
 			Range
 		};
-		
+
 		LimitType() = default;
   		constexpr LimitType(Value value) : _value(value) { }
 		uint8_t fromString(const char *value);

src/mqtt.cpp

@@ -25,6 +25,7 @@
 MongooseMqttClient mqttclient;
 EvseProperties claim_props;
 EvseProperties override_props;
+LimitProperties limit_props;
 DynamicJsonDocument mqtt_doc(4096);
 
 static long nextMqttReconnectAttempt = 0;
@@ -33,6 +34,7 @@ static bool connecting = false;
 uint8_t claimsVersion = 0;
 uint8_t overrideVersion = 0;
 uint8_t scheduleVersion = 0;
+uint8_t limitVersion = 0;
 
 String lastWill = "";
 
@@ -68,14 +70,13 @@ void mqttmsg_callback(MongooseString topic, MongooseString payload) {
     if (shaper.getState()) {
       shaper.shapeCurrent();
     }
-
   }
   else if (topic_string == mqtt_grid_ie)
   {
     grid_ie = payload_str.toInt();
     DBUGF("grid:%dW", grid_ie);
     divert.update_state();
-    
+
     // if shaper use the same topic as grid_ie
     if (mqtt_live_pwr == mqtt_grid_ie) {
       shaper.setLivePwr(grid_ie);
@@ -183,6 +184,16 @@ void mqttmsg_callback(MongooseString topic, MongooseString payload) {
     mqtt_clear_schedule(payload_str.toInt());
   }
 
+  else if (topic_string == mqtt_topic + "/limit/set") {
+    if (payload_str.equals("clear")) {
+      DBUGLN("clearing limits");
+      limit.clear();
+    }
+    else if (limit_props.deserialize(payload_str)) {
+      mqtt_set_limit(limit_props);
+    }
+  }
+
   // Restart
   else if (topic_string == mqtt_topic + "/restart") {
     restart_system();
@@ -292,6 +303,7 @@ mqtt_connect()
     mqtt_publish_override();
     mqtt_publish_claim();
     mqtt_publish_schedule();
+    mqtt_publish_limit();
 
     // MQTT Topic to subscribe to receive RAPI commands via MQTT
     String mqtt_sub_topic = mqtt_topic + "/rapi/in/#";
@@ -366,6 +378,10 @@ mqtt_connect()
     mqttclient.subscribe(mqtt_sub_topic);
     yield();
 
+    mqtt_sub_topic = mqtt_topic + "/limit/set";
+    mqttclient.subscribe(mqtt_sub_topic);
+    yield();
+
     // ask for a system restart
     mqtt_sub_topic = mqtt_topic + "/restart";
     mqttclient.subscribe(mqtt_sub_topic);
@@ -489,6 +505,24 @@ mqtt_publish_schedule() {
   }
 }
 
+void
+mqtt_set_limit(LimitProperties &limitProps) {
+  Profile_Start(mqtt_set_limit);
+  limit.set(limitProps);
+  mqtt_publish_limit();
+  Profile_End(mqtt_set_limit, 5);
+}
+
+void
+mqtt_publish_limit() {
+  LimitProperties limitProps;
+  const size_t capacity = JSON_OBJECT_SIZE(3) + 512;
+  DynamicJsonDocument limit_data(capacity);
+  limitProps = limit.get();
+  bool success = limitProps.serialize(limit_data);
+  mqtt_publish_json(limit_data, "/limit");
+}
+
 void
 mqtt_publish_json(JsonDocument &data, const char* topic) {
   Profile_Start(mqtt_publish_json);
@@ -555,6 +589,11 @@ mqtt_loop() {
       DBUGF("Schedule has changed, publishing to MQTT");
       scheduleVersion = scheduler.getVersion();
     }
+    if (limitVersion != limit.getVersion()) {
+      mqtt_publish_limit();
+      DBUGF("Limit has changed, publishing to MQTT");
+      limitVersion = limit.getVersion();
+    }
   }
   Profile_End(mqtt_loop, 5);
 }

src/mqtt.h

@@ -8,11 +8,14 @@
 #include <Arduino.h>
 #include <ArduinoJson.h>
 #include "evse_man.h"
+#include "limit.h"
 
-#define MQTT_PROTOCOL_MQTT          0
-#define MQTT_PROTOCOL_MQTT_SSL      1
-#define MQTT_PROTOCOL_WEBSOCKET     2
-#define MQTT_PROTOCOL_WEBSOCKET_SSL 3
+enum mqtt_protocol {
+	MQTT_PROTOCOL_MQTT,
+	MQTT_PROTOCOL_MQTT_SSL,
+	MQTT_PROTOCOL_WEBSOCKET,
+	MQTT_PROTOCOL_WEBSOCKET_SSL
+};
 
 #define MQTT_LOOP	500
 
@@ -37,6 +40,8 @@ extern void mqtt_publish_json(JsonDocument &data, const char* topic);
 extern void mqtt_publish_schedule();
 extern void mqtt_set_schedule(String schedule);
 extern void mqtt_clear_schedule(uint32_t event);
+extern void mqtt_publish_limit();
+extern void mqtt_set_limit(LimitProperties &limitProps);
 
 // -------------------------------------------------------------------
 // Restart the MQTT connection