Dual SIM (Switching GPO) - NO CORRECT WORK


#1

Hello.

I use dual SIM, and switch between them using the GPO pin.
But , works this variant not correct…
When enabling is initialized first SIM,and under switching GPO pin
second SIM is not initialized.


Thank you in advance.
Alex


#2

Depends on what you are switching. Supply voltage?
Write down what exactly your proceeding is.

IMO the module doesn’t catch the change.

Heinz


#3

On not use SIM(rezerv) I fix RESET(use SIMRST ) -active, and on SIM(Base) I permit exchange data…