From c933b4cdcdd85d11934f200b5f49af0a29f05901 Mon Sep 17 00:00:00 2001
From: "Dustin C. Hatch" <dustin@hatch.name>
Date: Mon, 16 May 2022 21:42:41 -0500
Subject: [PATCH] mqtt discovery: Set icon for soil moisture sensor

---
 mqtt_discovery.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/mqtt_discovery.cpp b/mqtt_discovery.cpp
index a7c4465..736c948 100644
--- a/mqtt_discovery.cpp
+++ b/mqtt_discovery.cpp
@@ -13,6 +13,7 @@ struct sensor_config {
     const char* unit;
     const char* state_class;
     const char* entity_category;
+    const char* icon;
 };
 
 static bool publish_config(PubSubClient* mqtt, const char* topic,
@@ -34,6 +35,9 @@ static bool publish_config(PubSubClient* mqtt, const char* topic,
     if (config->entity_category != NULL) {
         doc["entity_category"] = config->entity_category;
     }
+    if (config->icon != NULL) {
+        doc["icon"] = config->icon;
+    }
     auto device = doc.createNestedObject("device");
     device["manufacturer"] = DEVICE_MANUFACTURER;
     device["name"] = DEVICE_NAME;
@@ -61,7 +65,9 @@ bool publish_all_config(PubSubClient* mqtt, const char* ident) {
         .device_class = NULL,
         .unit = NULL,
         .state_class = "measurement",
-        .entity_category = NULL};
+        .entity_category = NULL,
+        .icon = "mdi:water",
+    };
     publish_config(mqtt, TOPIC_CFG_MOISTURE, &moisture);
     struct sensor_config temperature = {
         .name = "Garden Sensor Temperature",