Must writeChanges or the XBee can't connect!

library.json

@@ -1,6 +1,6 @@
 {
   "name": "TinyGSM",
-  "version": "0.7.9",
+  "version": "0.7.10",
   "description": "A small Arduino library for GPRS modules, that just works. Includes examples for Blynk, MQTT, File Download, and Web Client. Supports many GSM, LTE, and WiFi modules with AT command interfaces.",
   "keywords": "GSM, AT commands, AT, SIM800, SIM900, A6, A7, M590, ESP8266, SIM7000, SIM800A, SIM800C, SIM800L, SIM800H, SIM808, SIM868, SIM900A, SIM900D, SIM908, SIM968, M95, MC60, MC60E, BG96, ublox, Quectel, SIMCOM, AI Thinker, LTE, LTE-M",
   "authors":

library.properties

@@ -1,5 +1,5 @@
 name=TinyGSM
-version=0.7.9
+version=0.7.10
 author=Volodymyr Shymanskyy
 maintainer=Volodymyr Shymanskyy
 sentence=A small Arduino library for GPRS modules, that just works.

src/TinyGsmClientXBee.h

@@ -864,31 +864,36 @@ protected:
 
   bool modemConnect(IPAddress ip, uint16_t port, uint8_t mux = 0, bool ssl = false, int timeout_s = 75) {
 
-    savedIP = ip;  // Set the newly requested IP address
     bool success = true;
     uint32_t timeout_ms = ((uint32_t)timeout_s)*1000;
     XBEE_COMMAND_START_DECORATOR(5, false)
-    String host; host.reserve(16);
-    host += ip[0];
-    host += ".";
-    host += ip[1];
-    host += ".";
-    host += ip[2];
-    host += ".";
-    host += ip[3];
-
-    if (ssl) {
-      sendAT(GF("IP"), 4);  // Put in SSL over TCP communication mode
+
+    if (ip != savedIP) {  // Can skip almost everything if there's no change in the IP address
+      savedIP = ip;  // Set the newly requested IP address
+      String host; host.reserve(16);
+      host += ip[0];
+      host += ".";
+      host += ip[1];
+      host += ".";
+      host += ip[2];
+      host += ".";
+      host += ip[3];
+
+      if (ssl) {
+        sendAT(GF("IP"), 4);  // Put in SSL over TCP communication mode
+        success &= (1 == waitResponse());
+      } else {
+        sendAT(GF("IP"), 1);  // Put in TCP mode
+        success &= (1 == waitResponse());
+      }
+
+      sendAT(GF("DL"), host);  // Set the "Destination Address Low"
       success &= (1 == waitResponse());
-    } else {
-      sendAT(GF("IP"), 1);  // Put in TCP mode
+      sendAT(GF("DE"), String(port, HEX));  // Set the destination port
       success &= (1 == waitResponse());
-    }
 
-    sendAT(GF("DL"), host);  // Set the "Destination Address Low"
-    success &= (1 == waitResponse());
-    sendAT(GF("DE"), String(port, HEX));  // Set the destination port
-    success &= (1 == waitResponse());
+      success &= writeChanges();
+    }
 
     for (unsigned long start = millis(); millis() - start < timeout_ms; ) {
       if (modemGetConnected()) {

src/TinyGsmCommon.h

@@ -10,7 +10,7 @@
 #define TinyGsmCommon_h
 
 // The current library version number
-#define TINYGSM_VERSION "0.7.9"
+#define TINYGSM_VERSION "0.7.10"
 
 #if defined(SPARK) || defined(PARTICLE)
   #include "Particle.h"