Cannot connect to the Network on SARA-R5 AWS IOT

Wireless & IoT
1

I have a problem regarding the connection initialization to SARA-R5 AWS IOT product. The device cannot initialized due to unknown reasons. I cannot finish the initialization set up according to this document: https://content.u-blox.com/sites/default/files/SARA-R5-AWS-IoT-ExpressLink-development-guide_AppNote_UBX-21042016.pdf
Everytime I entered AT+CONNECT after I got OK from the endpoint settings, it will return me “ERR14 2 UNABLE TO CONNECT”, which is not the right answer, meaning that I cannot continue the steps later.

2

Please check your power supply. See if the voltage is adequate for the SARA-AWS.

3

Also try the steps here and maybe a different carrier SIM card

4

I have tried using direct power supply from a Rigol, It does not work still.

5

I have changed sim cards twice but it is still give me unable to connect? Could it be something with the original antenna or something else?