feat: now you can leave blank the "wifi" and "password" (or only "password") fields in config.json

Author: infra-blue

lib/Set_NTP_Time/Set_NTP_Time.cpp

@@ -17,16 +17,49 @@ void set_NTP_time() {
   WiFi.mode(WIFI_STA);
   uint8_t n_net = WiFi.scanNetworks();
 
-  WiFi.begin(conf.wifi.SSID, conf.wifi.PASSWORD);
-  Serial.printf("Connecting to %s ", conf.wifi.SSID);
+  char ssid[256];
+  strlcpy(ssid, conf.wifi.SSID, sizeof(ssid));
+
+  if(strcmp(conf.wifi.SSID, "") == 0) {
+    bool open_ap_found = false;
+
+    if (n_net) {
+      Serial.println("Network found!\n");
+      for (uint8_t i = 0; i < n_net; ++i)
+        if(WiFi.encryptionType(i) == WIFI_AUTH_OPEN) {
+          strlcpy(ssid, WiFi.SSID(i).c_str(), sizeof(ssid));
+          open_ap_found = true;
+          break;
+        }
+    }
+    else
+      Serial.println("No network found.\n");
+
+    if(open_ap_found) {
+      WiFi.begin(ssid);
+      Serial.printf("Connecting to %s ", ssid);
+    }
+    else {
+      Serial.println("No open network found.\n");
+      return;
+    }
+  }
+  else if((strcmp(conf.wifi.SSID, "") != 0) && (strcmp(conf.wifi.PASSWORD, "") == 0)) {
+    WiFi.begin(conf.wifi.SSID);
+    Serial.printf("Connecting to %s ", conf.wifi.SSID);
+  }
+  else {
+    WiFi.begin(conf.wifi.SSID, conf.wifi.PASSWORD);
+    Serial.printf("Connecting to %s ", conf.wifi.SSID);
+  }
 
   while(WiFi.status() != WL_CONNECTED && WiFi.status() != WL_CONNECT_FAILED)
     delay(100);
 
   if(WiFi.status() == WL_CONNECT_FAILED)
-    Serial.printf("\nError connecting to %s.\n", conf.wifi.SSID);
+    Serial.printf("\nError connecting to %s.\n", ssid);
 
-  Serial.printf("\nConnected to %s.\n", conf.wifi.SSID);
+  Serial.printf("\nConnected to %s.\n", ssid);
 
   timeClient.begin();
   delay(50);
@@ -35,7 +68,7 @@ void set_NTP_time() {
 
   if(timeClient.isTimeSet()) {
     rtc.adjust(timeClient.getEpochTime());
-    Serial.printf("RTC adjusted with NTP time.\nDisconnecting from %s.\n", conf.wifi.SSID);
+    Serial.printf("RTC adjusted with NTP time.\nDisconnecting from %s.\n", ssid);
   }
   else {
     Serial.printf("NTP server error. Time not set.\n");