add MAC address to info output; fix naming convention

Author: coding-lemur

README.md

@@ -96,6 +96,7 @@ Topic: co2-meter/`{device ID}`/out/`{command}`
 | network.wifiQuality | quality of signal strength (value between 0 and 100%)   | number  |
 | network.wifiSsid    | SSID of connected wifi                                  | string  |
 | network.ip          | ip address of the module                                | string  |
+| network.mac         | MAC address of the device                               | string  |
 | co2.isPreheating    | TRUE if the sensor is preheated                         | boolean |
 | co2.temperature     | temperature from sensor (in °C)                         | number  |
 | co2.ppm             | CO2 concentration in the air (in ppm)                   | number  |

src/main.cpp

@@ -110,7 +110,7 @@ void onWiFiEvent(WiFiEvent_t event)
     }
 }
 
-int GetRssiAsQuality(int rssi)
+int getRssiAsQuality(int rssi)
 {
     int quality = 0;
 
@@ -151,9 +151,10 @@ DynamicJsonDocument getInfoJson()
     JsonObject network = doc.createNestedObject("network");
     int8_t rssi = WiFi.RSSI();
     network["wifiRssi"] = rssi;
-    network["wifiQuality"] = GetRssiAsQuality(rssi);
+    network["wifiQuality"] = getRssiAsQuality(rssi);
     network["wifiSsid"] = WiFi.SSID();
     network["ip"] = WiFi.localIP().toString();
+    network["mac"] = WiFi.macAddress();
 
     // CO2 meter
     JsonObject co2Meter = doc.createNestedObject("co2");