Add handling for responses with Frame ID 0x00

tools/esp8266/app.cpp

@@ -231,6 +231,9 @@ void app::loop(void) {
                     Inverter<> *iv = mSys->findInverter(&p->packet[1]);
                     if(NULL != iv) {
                         uint8_t *pid = &p->packet[9];
+                        if (*pid == 0x00) {
+                            DPRINT(DBG_DEBUG, "fragment number zero received and ignored");
+                        } else {
                             if((*pid & 0x7F) < 5) {
                                 memcpy(mPayload[iv->id].data[(*pid & 0x7F) - 1], &p->packet[10], len-11);
                                 mPayload[iv->id].len[(*pid & 0x7F) - 1] = len-11;
@@ -246,6 +249,7 @@ void app::loop(void) {
                         }
                     }
                 }
+            }
 
             mSys->BufCtrl.popBack();
         }