Fix SIMCOM length read/confirmed/requested

src/TinyGsmClientSIM7000.h

@@ -807,44 +807,33 @@ protected:
     size_t len_requested = stream.readStringUntil(',').toInt();
     //  ^^ Requested number of data bytes (1-1460 bytes)to be read
     size_t len_confirmed = stream.readStringUntil('\n').toInt();
-    if (len_confirmed > len_requested) {
+    if (len_confirmed < len_requested) {
       DBG(len_requested - len_confirmed, "fewer bytes confirmed than requested!");
     }
     sockets[mux]->sock_available = len_confirmed;
     // ^^ Confirmed number of data bytes to be read, which may be less than requested.
     // 0 indicates that no data can be read.
 
-    for (size_t i=0; i<len_confirmed; i++) {
+  size_t len_read = 0;
+    for (size_t i=0; i<TinyGsmMin(len_confirmed, len_requested) ; i++) {
 #ifdef TINY_GSM_USE_HEX
       while (stream.available() < 2) { TINY_GSM_YIELD(); }
       char buf[4] = { 0, };
       buf[0] = stream.read();
+      len_read++;
       buf[1] = stream.read();
       char c = strtol(buf, NULL, 16);
+      len_read++;
 #else
       while (!stream.available()) { TINY_GSM_YIELD(); }
       char c = stream.read();
+      len_read++;
 #endif
       sockets[mux]->rx.put(c);
     }
     waitResponse();
-    DBG("### READ:", len_confirmed, "from", mux);
-    return len_confirmed;
-  }
-
-  size_t modemGetAvailable(uint8_t mux) {
-    sendAT(GF("+CIPRXGET=4,"), mux);
-    size_t result = 0;
-    if (waitResponse(GF("+CIPRXGET:")) == 1) {
-      streamSkipUntil(','); // Skip mode 4
-      streamSkipUntil(','); // Skip mux
-      result = stream.readStringUntil('\n').toInt();
-      waitResponse();
-    }
-    if (!result) {
-      sockets[mux]->sock_connected = modemGetConnected(mux);
-    }
-    return result;
+    DBG("### READ:", len_read, "from", mux);
+    return len_read;
   }
 
   bool modemGetConnected(uint8_t mux) {

src/TinyGsmClientSIM800.h

@@ -735,29 +735,33 @@ protected:
     size_t len_requested = stream.readStringUntil(',').toInt();
     //  ^^ Requested number of data bytes (1-1460 bytes)to be read
     size_t len_confirmed = stream.readStringUntil('\n').toInt();
-    if (len_confirmed > len_requested) {
+    if (len_confirmed < len_requested) {
       DBG(len_requested - len_confirmed, "fewer bytes confirmed than requested!");
     }
     sockets[mux]->sock_available = len_confirmed;
     // ^^ Confirmed number of data bytes to be read, which may be less than requested.
     // 0 indicates that no data can be read.
 
-    for (size_t i=0; i<len_confirmed; i++) {
+  size_t len_read = 0;
+    for (size_t i=0; i<TinyGsmMin(len_confirmed, len_requested) ; i++) {
 #ifdef TINY_GSM_USE_HEX
       while (stream.available() < 2) { TINY_GSM_YIELD(); }
       char buf[4] = { 0, };
       buf[0] = stream.read();
+      len_read++;
       buf[1] = stream.read();
       char c = strtol(buf, NULL, 16);
+      len_read++;
 #else
       while (!stream.available()) { TINY_GSM_YIELD(); }
       char c = stream.read();
+      len_read++;
 #endif
       sockets[mux]->rx.put(c);
     }
     waitResponse();
-    DBG("### READ:", len_confirmed, "from", mux);
-    return len_confirmed;
+    DBG("### READ:", len_read, "from", mux);
+    return len_read;
   }
 
   size_t modemGetAvailable(uint8_t mux) {