Robu - India's Innovative Electronics Community

I'm facing an issue with the recently purchased 4G LTE Shield With GNSS and BLE5.0 ( https://robu.in/product/4g-lte-shield-w ... nd-ble5-0/ )
Its not connecting to my web server.
As I need to send data through this module, I tried connecting using AT commands, but it's giving an error without displaying any error message.

Kindly help me to solve this issue.

AT commands and output I am using

AT+CGDCONT=1,"IP","airtelgprs.com"
OK
AT+CGACT=1,1
OK
AT+CIPSTART="TCP","https://bitsphere.in/dustbin/action.php","443"
ERROR
AT+CIPSTART="TCP","http://bitsphere.in/dustbin/action.php","80"
ERROR
AT+CIPSTART="TCP","167.71.227.54","80"
ERROR
AT+CIPSTART="TCP","167.71.227.54","443"
ERROR

It looks like you're having trouble establishing a TCP connection with your 4G LTE Shield. Here are some steps to help troubleshoot the issue:

1) Check APN: Ensure the APN (airtelgprs.com) is correct for your provider.
2) Signal Quality: Use AT+CSQ to check the signal strength.
3) Verify PDP Context: After AT+CGDCONT, use AT+CGACT? to confirm the context is active (1,1).
4) Use Correct Command: For AT+CIPSTART, omit http:// or https://. Use AT+CIPSTART="TCP","bitsphere.in","80" for HTTP.
5) Server Configuration: Check if your server allows connections on the specified ports (80 and 443).
6) Verbose Errors: Enable detailed error messages with AT+CMEE=2.
7) Test Simple URL: Try connecting to google.com using AT+CIPSTART="TCP","google.com","80".

Let me know if you still face issues!