Refactor of Host ESP32

Create a json string that is readable by the server (will be later sent). Closes #54 (closed) Major refactors and cleanup of the host code. This includes SD card specific utilities, moving logging to separate files, move commonly used definitions to a separate file. Closes #56 (closed) Renamed TimeManager to NTPManager to better reflect its purpose in the project. Try remounting SD after a number of failed attempts (see Definitions.h) Early exit continuous SD access if the SD has not been found before. Closes #47 (closed)

host/host_central_mast/src/main.cpp

@@ -60,7 +60,7 @@ void on_data_sent(const uint8_t *mac_addr, esp_now_send_status_t status) {
 }
 
 void on_data_recv(const uint8_t *mac, const uint8_t *incomingData, int len) {
-    esp_log_write(ESP_LOG_INFO, TAG_ESPNOW, "Message recieved\n");
+    esp_log_write(ESP_LOG_INFO, TAG_ESPNOW, "Message received\n");
     // copy received data to a char array
     char data[len];
     memcpy(data, incomingData, len);
@@ -78,9 +78,7 @@ void on_data_recv(const uint8_t *mac, const uint8_t *incomingData, int len) {
         }
     }
 
-    DynamicJsonDocument doc = parseReceivedJsonData(data);
-
-    // TODO: Respond to the client. Maybe do that before parsing anything
+    // TODO: Think if response to client may contain error messages
     response response = {};
     response.type = dataAck;
     esp_read_mac(response.mac, ESP_MAC_WIFI_STA);
@@ -88,6 +86,8 @@ void on_data_recv(const uint8_t *mac, const uint8_t *incomingData, int len) {
     esp_err_t success = esp_now_send(mac, (uint8_t *)&response, sizeof(response));
     esp_log_write(ESP_LOG_DEBUG, TAG_ESPNOW, (success == ESP_OK) ? "Response sent\n" : "Failed to respond\n");
 
+    DynamicJsonDocument doc = parseReceivedJsonData(data);
+
     String macAddress = getMacAddressAsString(mac);
 
     // add timestamp and mac address
@@ -190,9 +190,6 @@ void setup() {
                             0);                  /* Core where the task should run */
 
     SerialAT.begin(UART_BAUD, SERIAL_8N1, PIN_RX, PIN_TX);
-
-    // Restart takes quite some time
-    // To skip it, call init() instead of restart()
 }
 
 void loop() {