Connect SIM800L and AT&T Chip to the Cellular Network

Using Arduino General Electronics
1

First I am in Mexico. I want to connect the SIM800L module to the cellular network to be able to make HTTP requests with GET and POST, I have an AT&T chip. But I can't perform the initial configuration, these are my commands.

AT + SAPBR = 3.1, "CONTYPE", "GPRS"

AT + SAPBR = 3.1, "APN", "INTERNET"

AT + SAPBR = 1.1

AT + SAPBR = 2.1

AT + CLTS = 1

I hope you can help me, or comment if someone has managed to communicate for HTTP.

Thanks and regards

2

you need to read response coming from your sim800L for each each AT command sent

and you need to post your code here ( with code tags )

3

Thanks "KASSIMSAMJI":

I tell you that I have connected the module directly to the PC by UART. My specific question is towards the AT command "AT + SAPBR = 2.1" because it does not assign me an IP address.

RDY
+CFUN: 1
+CPIN: READY
Call Ready
SMS Ready
AT+SAPBR=3,1,"CONTYPE","GPRS"
OK
AT+SAPBR=3,1,"APN","INTERNET"
OK
AT+SAPBR=1,1
ERROR
AT+SAPBR=2,1
+SAPBR: 1,3,"0.0.0.0"
OK
AT+CLTS=1
OK

So, when using AT commands to make HTTP requests it always generates an error on the network. There is something wrong with the network configuration and I don't know what it is, I hope you can help me.

Thanks and Regards