Shift EC20 mode and switch

Move away EC20 Support 4 Patterns .
0:rmnet Pattern
     adopt QMI Sent by tool QMI command , Access to the public network IP. This mode can cooperate usb_ecm Drive or Qualcomm GobiNet Driver USES .
1:ecm Pattern
     standard-passing CDC-ECM launch data call, Send standard ECM command , Get LAN ip. This mode matches cdc_ether Driver USES
2:mbim Pattern
    Mobile Broadband Interface Model, Authentic mobile broadband interface model , Dedicated to 3G/4G/5G Modular , Only in win8 The above windows Upper use . Generally only WINDOWS Next use .
3:rndis Pattern
     be based on USB Realization RNDIS It's actually TCP/IP over USB, Is in the USB Running on the device TCP/IP, Give Way USB The device looks like a network card to obtain a LAN ip. This is the easiest way , After inserting the mobile phone card into the module , The module will automatically dial up the Internet .

Switching method
     Send through serial port AT command

echo -e "AT+QCFG=\"usbnet\",0\r\n" > /dev/ttyUSB2    # Set mode 
echo -e "AT+CFUN=1,1\r\n" >/dev/ttyUSB2             # Restart the module 

The switch can be completed by replacing the number with the number of the corresponding mode .

Use RNDIS Mode time , You can set up the connection using the following command APN

echo -e "AT+CGDCONT=1,\"IPV4V6\",\"3gnet\"\r\n" > /dev/ttyUSB2   # Set context 
echo -e "AT+CGACT=1,1\r\n" > /dev/ttyUSB2     # Activation context 
echo -e "AT+CFUN=1,1\r\n" >/dev/ttyUSB2