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

BR
Li

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/.