Thank you very much for your answers. 'll try to reply:
1.- Sorry, I don’t know anything about TCP/IP…but I promise you I’'try to learn.
2…-When the code is running, blynk connects and it doesn’t drop, so I am able to control my arduino (with lcds, rtc, leds…) using my android phone (blynk app) without any problem, and if I include “#define BLYNK_DEBUG” to enable debug prints on serial, it seems not to be therefore saturated…I think connection is ok and doesn’t block the code (not for any second at least).
3.-In fact…when blynk has connected, a few times, SMS and CALLS work (Serial port overloaded?), but when I disconnect it (removing “Blynk.begin…” it works perfect (not any fail). (Blynk.begin is on setup, and blynk.run is included in the loop)
I’ll try to get a very, very simply code, only with both performances. If it remains failing, I’'post this simply code.