From b3ee38b03ee3a8e2ed5d0b7accd104aa7c8b3a52 Mon Sep 17 00:00:00 2001
From: Tobias Diedrich <ranma+git@tdiedrich.de>
Date: Mon, 9 Sep 2024 15:16:37 +0200
Subject: [PATCH] Publish ESP heap and temperature details on MQTT

I noticed that some useful ESP stats are missing on the MQTT feed, so this adds:

- ESP temperature
- ESP heap stats (size, free, minFree, maxAlloc)
---
 src/MqttHandleDtu.cpp  | 6 ++++++
 src/MqttHandleHass.cpp | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/src/MqttHandleDtu.cpp b/src/MqttHandleDtu.cpp
index e8192b2e2..6c8c38c8e 100644
--- a/src/MqttHandleDtu.cpp
+++ b/src/MqttHandleDtu.cpp
@@ -7,6 +7,7 @@
 #include "MqttSettings.h"
 #include "NetworkSettings.h"
 #include <Hoymiles.h>
+#include <CpuTemperature.h>
 
 MqttHandleDtuClass MqttHandleDtu;
 
@@ -34,6 +35,11 @@ void MqttHandleDtuClass::loop()
     MqttSettings.publish("dtu/uptime", String(millis() / 1000));
     MqttSettings.publish("dtu/ip", NetworkSettings.localIP().toString());
     MqttSettings.publish("dtu/hostname", NetworkSettings.getHostname());
+    MqttSettings.publish("dtu/temperature", String(CpuTemperature.read()));
+    MqttSettings.publish("dtu/heap/size", String(ESP.getHeapSize()));
+    MqttSettings.publish("dtu/heap/free", String(ESP.getFreeHeap()));
+    MqttSettings.publish("dtu/heap/minfree", String(ESP.getMinFreeHeap()));
+    MqttSettings.publish("dtu/heap/maxalloc", String(ESP.getMaxAllocHeap()));
     if (NetworkSettings.NetworkMode() == network_mode::WiFi) {
         MqttSettings.publish("dtu/rssi", String(WiFi.RSSI()));
         MqttSettings.publish("dtu/bssid", WiFi.BSSIDstr());
diff --git a/src/MqttHandleHass.cpp b/src/MqttHandleHass.cpp
index 87f1ccb9b..258a3cdce 100644
--- a/src/MqttHandleHass.cpp
+++ b/src/MqttHandleHass.cpp
@@ -61,6 +61,11 @@ void MqttHandleHassClass::publishConfig()
     publishDtuSensor("IP", "", "diagnostic", "mdi:network-outline", "", "");
     publishDtuSensor("WiFi Signal", "signal_strength", "diagnostic", "", "dBm", "rssi");
     publishDtuSensor("Uptime", "duration", "diagnostic", "", "s", "");
+    publishDtuSensor("Temperature", "temperature", "diagnostic", "mdi:thermometer", "°C", "temperature");
+    publishDtuSensor("Heap Size", "", "diagnostic", "mdi:memory", "Bytes", "heap/size");
+    publishDtuSensor("Heap Free", "", "diagnostic", "mdi:memory", "Bytes", "heap/free");
+    publishDtuSensor("Largest Free Heap Block", "", "diagnostic", "mdi:memory", "Bytes", "heap/maxalloc`");
+    publishDtuSensor("Lifetime Minimum Free Heap", "", "diagnostic", "mdi:memory", "Bytes", "heap/minfree`");
     publishDtuBinarySensor("Status", "connectivity", "diagnostic", config.Mqtt.Lwt.Value_Online, config.Mqtt.Lwt.Value_Offline, config.Mqtt.Lwt.Topic);
 
     yield();