- Feature RTT

WiFi power-management as station:  if aprs-is connection is
  established, switch power saving setting from WIFI_PS_MIN_MODEM
  to WIFI_PS_NONE. -> less delay.
- Beauty:
  - Webserver index.html: small change in description
  - getLocalTimeTheBetterWay():
    changed  if (now != ~0 && now) {
    to       if (now && now != ~((time_t ) 0)) {
    ;)

Signed-off-by: Thomas Osterried <dl9sau@darc.de>

data_embed/index.html

@@ -832,13 +832,13 @@ Hard readable lengths / too long for our display:
                  Use with care; resulting longer path consumes a bit more airtime.
             </div>
             <div class="grid-container full">
-              <h5 class="u-full-width">TTGO T-Beam middle hardware-button: User key functions:</h5>
+              <h5 class="u-full-width">TTGO T-Beam <b>middle</b> hardware-button<br>(User key functions):</h5>
             </div>
             <div>
                <h6 class="u-full-width">short press</h6>
                If OLED is enabled and OLED is OFF:<br/>
                <ul>
-                 <li>a short press will wake it up and show current data (as "Display Timeout" seconds</li>
+                 <li>a short press will wake it up and show current data (as long as your configured "Display Timeout")</li>
                </ul>
                If OLED is disabled or OLED is ON:<br>
                <ul>

src/TTGO_T-Beam_LoRa_APRS.ino

@@ -526,7 +526,7 @@ volatile boolean sema_lora_chip = false;
 bool getLocalTimeTheBetterWay(struct tm * info)
 {
   time_t now = time(0);
-  if (now != ~0 && now) {
+  if (now && now != ~((time_t ) 0)) {
     localtime_r(&now, info);
     if (info->tm_year > 99)
       return true;

src/taskGPS.cpp

@@ -6,6 +6,8 @@
 
 SFE_UBLOX_GPS myGPS;
 
+extern uint8_t usb_serial_data_type;
+
 #ifdef ENABLE_WIFI
   #include "wifi_clients.h"
   #define MAX_GPS_WIFI_CLIENTS 6
@@ -57,23 +59,25 @@ bool gpsInitialized = false;
     while (gpsSerial.available() > 0) {
       char gpsChar = (char)gpsSerial.read();
       gps.encode(gpsChar);
-      #ifdef ENABLE_WIFI
         if (gpsChar == '$') {
           gpsDataBuffer = String(gpsChar);
         } else {
           gpsDataBuffer += String(gpsChar);
 
           if (gpsChar == '\n') {
+	    if (usb_serial_data_type == 4)
+	      Serial.println(gpsDataBuffer);
+      #ifdef ENABLE_WIFI
             iterateWifiClients([](WiFiClient *client, int clientIdx, const String *data){
               if (client->connected()){
                 client->print(*data);
                 client->flush();
               }
             }, &gpsDataBuffer, gps_clients, MAX_GPS_WIFI_CLIENTS);
+      #endif
             gpsDataBuffer = "";
           }
         }
-      #endif
     }
     vTaskDelay(100 / portTICK_PERIOD_MS);
   }

src/taskWebServer.cpp

@@ -1358,8 +1358,6 @@ void restart_AP_or_STA(void) {
   } else if (WiFi.getMode() == WIFI_MODE_STA) {
 
     do_serial_println("WiFi: Status: " + String((int ) WiFi.status()) + ". Will run as mode STA (remote SSID: '" +  used_wifi_ModeSTA_SSID + "')");
-    // Save some battery
-    //WiFi.setSleep(true);
     esp_wifi_set_ps(WIFI_PS_MAX_MODEM);
     oled_wifi_SSID_curr = used_wifi_ModeSTA_SSID;
     oled_wifi_PASS_curr = used_wifi_ModeSTA_PASS;
@@ -1624,6 +1622,9 @@ int connect_to_aprsis(void) {
   // avoid sending old data
   to_aprsis_data = "";
 
+  // WiFi powermanagement. Disable sleep -> better network performance
+  WiFi.setSleep(false);
+
   return 0;
 }
 
@@ -1964,6 +1965,7 @@ void send_to_aprsis()
       #elif T_BEAM_V1_2
         axp.disableALDO2();
       #endif
+      WiFi.setSleep(false);
       Serial.printf("Firmware: Update: %s\r\n", upload.filename.c_str());
       if (!Update.begin(UPDATE_SIZE_UNKNOWN)) { //start with max available size
         #if defined(ENABLE_SYSLOG)
@@ -2173,6 +2175,7 @@ void send_to_aprsis()
               if ((ret = connect_to_aprsis()) < 0) {
                 log_msg = String("APRS-IS: on_Err: '") + aprsis_status + String("' [") + aprsis_client.remoteIP().toString() + String("], tries ") +  String(aprsis_connect_tries);
                 aprsis_client.stop();
+		WiFi.setSleep(true);
                 // Known problems which usually resolve by reboot:
                 if (ret == -5 /* login denied, until reboot. Reason unknown */ ||
                      (ret == -1 /* sometimes after boot it can't connect. DNS- or IP-stack Problem? */ && lora_digipeating_mode > 1) /* we are a digi */ ) {
@@ -2238,6 +2241,8 @@ void send_to_aprsis()
 
         } else {
 
+	  WiFi.setSleep(true);
+
           if (aprsis_status != "Error: no internet") {
             aprsis_status = "Error: no internet";
             // inform about state change