DefaultVendor= 0x19d2
DefaultProduct=0x0166
TargetVendor= 0x19d2
TargetProduct=0x0167
MessageEndpoint=0x01
MessageContent=55534243e856e2892400000080000685000000240000000000000000000000
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Extra AT command for locking the device to use only 4G LTE , have fun!!
AT+ZSNT=6,0,0
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The above setting has been tested on ZTE MF820 (CSL Hong Kong Ver.) with one2free SIM card only.
Thank you very much!
Especially for the AT command which may prove very useful. I quote from your posting on HKEPC if you don't mind:
May I add your name as the contributor of this device in the coming versions of the device reference?
Especially for the AT command which may prove very useful. I quote from your posting on HKEPC if you don't mind:
Code: Select all
AT+ZSNT=0,0,0 (Auto) - Default
AT+ZSNT=1,0,0 GPRS Only
AT+ZSNT=2,0,0 3G Only
AT+ZSNT=0,0,1 GPRS Preferred
AT+ZSNT=0,0,2 3G Preferred
AT+ZSNT=6,0,0 LTE Only (Tested)
AT+ZSNT=0,0,6 LTE Preferred (Not tested yet)
Sure.
In addition
1) CheckSuccess=20 should be added to the config as well. It is tested work.
2) I tested that the usbserial module in kernel 2.6.38 works on ZTE MF820 with "modprobe usbserial product=0x19d2 vendor=0x0167". However, Kernel 2.6.35 doesn't not work even with forced product/vendor ID.
In addition
1) CheckSuccess=20 should be added to the config as well. It is tested work.
2) I tested that the usbserial module in kernel 2.6.38 works on ZTE MF820 with "modprobe usbserial product=0x19d2 vendor=0x0167". However, Kernel 2.6.35 doesn't not work even with forced product/vendor ID.
In any case, the driver "option" is recommended for high speed modems.
If it does not know the USB ID of the modem yet, it can be activated manually:
If it does not know the USB ID of the modem yet, it can be activated manually:
Code: Select all
# modprobe -v option
# echo "19d2 0167" > /sys/bus/usb-serial/drivers/option1/new_id
I have tested that the driver "option" results lesser CPU usage on a OpenWRT powered router. However, the driver "usb-serial" result better transfer speed when using single TCP connection.
Testing setup: maximum downstream only, value taken from DUmeter, TP-Link WR841NDv3 with USB 2.0 mod
Downloading using FlashGet with 10 connections:
usb-serial: 3.2MB/s,CPU 75%
option: 3.2MB/s,CPU 96%
OFTA Hong Kong:
usb-serial: 2.9MB/s,Latency 30ms,Jitter 4ms
option: 2.5MB/s,Latency 29ms,Jitter 1ms
Testing setup: maximum downstream only, value taken from DUmeter, TP-Link WR841NDv3 with USB 2.0 mod
Downloading using FlashGet with 10 connections:
usb-serial: 3.2MB/s,CPU 75%
option: 3.2MB/s,CPU 96%
OFTA Hong Kong:
usb-serial: 2.9MB/s,Latency 30ms,Jitter 4ms
option: 2.5MB/s,Latency 29ms,Jitter 1ms