My problem was this: I could connect with Shield using SoftwareSerial, could see the startup Shield in the serial monitor (like "Call ready"), but when try send a simple AT nothing is response.
On first moment I solved using a simple wire jumper.
My problem was this: I could connect with Shield using SoftwareSerial, could see the startup Shield in the serial monitor (like "Call ready"), but when try send a simple AT nothing is response.
On first moment I solved using a simple wire jumper.