About EC200S-CN Linux Driver

Dear Supporter:
When we used the 4G module EC200S,We follow the doc:Quectel_EC200T_Linux_USB_Driver_User_Guide_V1.0 to modify out linux kernel.
and KBA_EC200&UC200_Linux&Android_USB_driver.doc
here is the issuse:
when the ec200s bootup,and the usb controller can enumerate a usb device.but the pid and vid is 2c7c,6002.
not 2c7c ,6026
and no usb serials create.here is the dmesg:

usb 1-1: new high-speed USB device number 2 using nuc970-ehci
cdc_acm 1-1:1.0: This device cannot do calls on its own. It is not a modem.
cdc_acm 1-1:1.0: ttyACM0: USB ACM device
usb 1-1: USB disconnect, device number 2
usb 1-1: new high-speed USB device number 3 using nuc970-ehci
cdc_ether 1-1:1.0 usb0: register ‘cdc_ether’ at usb-nuc970-ehci-1, CDC Ethernet Device, ae:0c:29:a3:9b:6d

and lsusb info is:
Bus 001 Device 005: ID 2c7c:6002
Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0001

2: i run the follow 2 cmds
2.1 mount -t debugfs debugfs /sys/kernel/debug
2.2 echo 2c7c 6002 > /sys/bus/usb-serial/drivers/option1/new_id
it will create 2 usb-serials :/dev/ttyusb0 and /dev/ttyusb1 but no ppp usb port
and i can communicat with the ec200s with ttyusb1 port

the questions are:
1:the pid and vid is 2c7c ,6002
2 : if i echo 2c7c 6002 to option1 node, no ppp port create


Your usb to serial driver need to be modified, if you want to get more help you can create a ticket on https://e-service.quectel.com/.