Hello guys, i have problem with A6 GPRS Dev Board. When i connect it directly to my PC (Windows 10) using USB TTL there is no problems, i can send calls and SMS using AT Comand Tester software. But i dont know how to coonect board to the arduino serial. I used AltSoftSerial and SoftwareSerial but there is no return when I send AT comand. Can u help me ?>