3G GSM Shield - American Version SIM5320A - Tinysine

Projects Networking, Protocols, and Devices
1

Hello,

I am looking for any help that you may be able to offer,

I purchased a GSM shield off of Amazon:
3G GSM Shield - American Version SIM5320A
Maker: Tinysine

I can not get the board to connect,

  • The error code is: "No response to AT"
    "Couldn't find FONA"

I have tried to follow the instructions from the makers website:

The screen capture video of my issues:

Overall I am using a Arduino 2560
Arduino version 1.8.8

  • I have tried to use a software and hardware serial connection
  • I have tried multiple computers
  • I have tried to connect with or without the SIM installed
  • I have tried to connect with and without the additional 9V power

Please help,

I'm willing to try anything you can offer,

Thank you,

Joe

Connection 2 (Resize).jpg
Connection 2 (Resize).jpg2944×1752 1.44 MB

Serial Output.txt (1.45 KB)

FONA3G_setbaud.ino (2.31 KB)

2

Solution:

I contacted the maker for help,

After they sent me the data sheet, I was able to determine the fix,

For a mega 2560 board, I had to jump the Tx and Rx to pin 12 and 13 using jumper wires.

I updated the code to reflect this change,

Afterwards, the problem was fixed,

Thank you all,

J

3

Another thing to note with most SIM modules is that if they have the USB interface, you can test them by connecting them to the PC USB. Then you can directly access the command line and AT command set. I like to set up all my SIM card parameters, APN, etc, and make sure they work. Then I connect it to a microcontroller system.