SIM7000 not working with AT commands
![userHead](https://dfimg.dfrobot.com/dfPortrait2.png)
Hello there! I am currently trying to get a SIM7000A to send an SMS message to my phone. However, upon using the AT Test sample code from the DFRobot_SIM7000 library, I noticed that my SIM7000 does not return any AT commands. However, the SIM7000 does say that my SIM card works.
![](https://dfimg.dfrobot.com/65c97d46aa9508d63a437d19/enshopforum/5ad59632da1fdbc76f06e3e83ffaee27.png)
Other library samples say my SIM card is ok:
![](https://dfimg.dfrobot.com/65c97d46aa9508d63a437d19/enshopforum/67a8faa3ea78af0f1620a8557a2d8344.png)
Additionally, I keep getting a “Fail to Attach service” error.
Many thanks in advance for all of your help!