Add Firmware Version to MQTT

Author: caco3

code/components/jomjol_mqtt/server_mqtt.cpp

@@ -151,6 +151,7 @@ bool MQTThomeassistantDiscovery(int qos) {
     //                                                   Group | Field            | User Friendly Name | Icon                      | Unit | Device Class     | State Class  | Entity Category
     allSendsSuccessed |= sendHomeAssistantDiscoveryTopic("",     "uptime",          "Uptime",            "clock-time-eight-outline", "s",   "",                "",            "diagnostic", qos);
     allSendsSuccessed |= sendHomeAssistantDiscoveryTopic("",     "MAC",             "MAC Address",       "network-outline",          "",    "",                "",            "diagnostic", qos);
+    allSendsSuccessed |= sendHomeAssistantDiscoveryTopic("",     "FirmwareVersion", "Firmware Version",  "application-outline",      "",    "",                "",            "diagnostic", qos);
     allSendsSuccessed |= sendHomeAssistantDiscoveryTopic("",     "hostname",        "Hostname",          "network-outline",          "",    "",                "",            "diagnostic", qos);
     allSendsSuccessed |= sendHomeAssistantDiscoveryTopic("",     "freeMem",         "Free Memory",       "memory",                   "B",   "",                "measurement", "diagnostic", qos);
     allSendsSuccessed |= sendHomeAssistantDiscoveryTopic("",     "wifiRSSI",        "Wi-Fi RSSI",        "wifi",                     "dBm", "signal_strength", "",            "diagnostic", qos);
@@ -244,6 +245,7 @@ bool publishStaticData(int qos) {
 
 	int aFreeInternalHeapSizeBefore = heap_caps_get_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);
 
+    allSendsSuccessed |= MQTTPublish(maintopic + "/" + "Firmware Version", getFwVersion().c_str(), qos, retainFlag);
     allSendsSuccessed |= MQTTPublish(maintopic + "/" + "MAC", getMac(), qos, retainFlag);
     allSendsSuccessed |= MQTTPublish(maintopic + "/" + "IP", *getIPAddress(), qos, retainFlag);
     allSendsSuccessed |= MQTTPublish(maintopic + "/" + "hostname", wlan_config.hostname, qos, retainFlag);