SIM808 Module - Connection problem(looping)

[Fischoteth]

Hello everyone,

the problem is as follows:

I am getting module response using sudo screen /dev/serial0 9600 as follows :

RDY
+CFUN:1
+CPIN:READY

RDY
+CFUN:1
+CPIN:READY

^And this goes on and on (as if the module is retrying for connection..)

The SIM card is inserted in SIM808 module, and its connected to RPi + powered up normally.

What could be the problem here? I have searched the web, but somewhat came up short solution-wise..

[Fischoteth]

Nobody knows?

[RaTTuS]

you may need to give us more info
what instructions are you following
what have you got hooked up full URL's to everything

[Fischoteth]

I've setup RPi Zero W with no problems whatsoever (using SSH and/or VNC for connecting to RPi).
The OS is Raspbian stretch?, fully updated (update, upgrade, firmware..)

Below is the GSM SIM808 Breakout Board module:
https://www.aliexpress.com/store/produc ... 07442.html

I've got the basics such as connecting TX to RX and vice versa..

Additional info:

When the SIMCard is not inserted, I get no loop and I can work with module through 'screen /dev/serial0 9600' just fine (using AT commands).

SIM card info:
Sim card is T-mobile, 2G/3G/4G capable. It is activated (tested & works fine on mobile phone).

Hmm, what could be the issue?