SNR是指信噪比，信号与噪声的比值，值越大就证明信号的功率比噪声功率大，信号质量越好。
C/N, C/No这两个是载噪声比值，一般是指GPS的射频噪声值，
C/N这个值是一般芯片或者是模块不包含发射链路的噪声值，
而C/No是从信号到天线发射整条链路的噪声值，一般这两个值在模块中都有提及。
Copy it from SNR，C/N, C/N0分别是什么意思，啥啥分不清楚，请技术大拿帮忙解答下
環境: Xubunt20.04
Get IP for MV31-W
#!/bin/bash
function cecho {
if [ "$1" == "red" ]; then
echo -e "\033[31m$2\033[0m"
elif [ "$1" == "blue" ]; then
echo -e "\033[34m$2\033[0m"
else
echo $2
fi
return 0
}
#Function to send an AT command and check the response.
function SendCommand {
local usb_interface="$1"
local at_command="$2"
local response
local line
sleep 1 # Avoid running AT commands too fast
echo -e "\nAT cmd: $at_command"
echo -n -e "$at_command" >"$usb_interface"
while IFS= read -r line <"$usb_interface"; do
#while read line <$usb_interface; do
if [[ "$line" == *COPS* ]]; then
# Extract the part of the line after the last comma
last_comma_part="${line##*,}"
# Check if the extracted part contains 7 or 13
if ! [[ "$last_comma_part" =~ (7|13) ]]; then
cecho "red" "Error: AT+COPS response does not contain 7 or 13."
exit 1
fi
fi
#echo aa$response
if [[ "$line" == *ERROR* ]]; then
cecho "red" "Error Code: -1002, Invalid AT command"
exit 1
fi
if [[ "$line" == *OK* ]]; then
echo -e "$response" | grep -v 'OK' #Print the response without OK
return 0
fi
done
#If the loop finishes without finding OK, it means there was no OK, thus error.
cecho "red" "Error: No OK response received for command: $at_command"
exit 1
}
function PrepareDriver {
local protocol=$1 # "mbim" or "qmi"
if [ "$protocol" == "mbim" ]; then
rv_name=("option" "usb_wwan" "usbserial" "cdc_mbim")
elif [ "$protocol" == "qmi" ]; then
drv_name=("option" "qmi_wwan")
else
cecho "red" "Error paramaters"
exit 1
fi
ret=0
for drv in ${drv_name[@]}; do
ret=$(lsmod | grep $drv | cut -f 1 -d " ") #drv: driver
if [ -z "$ret" ]; then
cecho "red" "Please install the driver of \"$drv\" with modprobe"
fi
done
}
function CheckInterface {
if ls "$1" >/dev/null 2>&1; then
echo "$1"
else
cecho "red" "Error code: -1001, Can't find the $1" >&2
echo ""
fi
}
# Function to write network configuration
function write_network_config {
local config_file=$1
local apn=$2
local apn_user=$3
local apn_pass=$4
local proxy=$5
sudo tee $config_file >/dev/null <<EOF
APN=$apn
APN_USER=$apn_user
APN_PASS=$apn_pass
PROXY=$proxy
EOF
if [ $? -ne 0 ]; then
cecho "red" "Error writing to $config_file"
exit 1
fi
}
function install_if_missing {
local package=$1
local cmd=$2
if ! type $cmd >/dev/null 2>&1; then
cecho "blue" "Installing $package..."
sudo apt-get install $package -y
else
cecho "blue" "$package is already installed."
fi
}
function PrepareGetIP {
local protocol=$1 # "mbim" or "qmi"
local cdc_wdm_device
local config_file
local wwan0
# Set config file and install utils based on protocol
if [ "$protocol" == "mbim" ]; then
config_file="/etc/mbim-network.conf"
install_if_missing "libmbim-utils" "mbimcli"
elif [ "$protocol" == "qmi" ]; then
config_file="/etc/qmi-network.conf"
install_if_missing "libqmi-utils" "qmicli"
else
cecho "red" "Invalid protocol: $protocol"
exit 1
fi
# Install udhcpc
install_if_missing "udhcpc" "udhcpc"
if [ -z /dev/cdc-wdm[0-9] ]; then
cecho "red" "Error Code: -1004, /dev/cdc-wdm* is null"
exit 1
else
cdc_wdm_device=$(ls /dev/ | grep cdc)
cdc_wdm_device=/dev/$cdc_wdm_device
fi
# Write network configuration
APN="INTERNET" #CHT
APN_USER=""
APN_PASS=""
PROXY="yes"
write_network_config "$config_file" "$APN" "$APN_USER" "$APN_PASS" "$PROXY"
# Check if /dev/cdc-wdm exists
if [ ! -c "$cdc_wdm_device" ]; then
cecho "red" "Error Code: -1004, $cdc_wdm_device does not exist"
exit 1
fi
# Protocol-specific configuration
if [ "$protocol" == "mbim" ]; then
# Find wwan interface
flag=0
for wwan in $(ls /sys/class/net); do
if [ -d "/sys/class/net/$wwan/device/driver" ]; then
driver=$(basename $(realpath /sys/class/net/$wwan/device/driver))
if [ "$driver" == "cdc_mbim" ]; then
flag=1
wwan0=$wwan
break
fi
fi
done
if [ "$flag" -eq 0 ]; then
cecho "red" "Error Code: -1005, can't find wwan interface."
exit 1
fi
# Get IP and connect to the Internet
sudo ip link set "$wwan0" down
sudo mbim-network "$cdc_wdm_device" start
sudo mbimcli -d "$cdc_wdm_device" --device-open-proxy --query-ip-configuration
sudo udhcpc -i "$wwan0"
sudo ip link set "$wwan0" up
elif [ "$protocol" == "qmi" ]; then
# Get wwan interface
wwan0=$(sudo qmicli -d "$cdc_wdm_device" -p --get-wwan-iface)
if [ $? -gt 0 ]; then
cecho "red" "Error Code: -1003, invalid wwan0 interface"
exit 1
fi
# Get IP and connect to the Internet
sudo qmicli -d "$cdc_wdm_device" --dms-set-operating-mode='online'
sudo ip link set "$wwan0" down
sudo tee /sys/class/net/"$wwan0"/qmi/raw_ip <<<'Y'
sudo ip link set "$wwan0" up
sudo qmicli -d "$cdc_wdm_device" --wda-get-data-format
sudo qmi-network "$cdc_wdm_device" start
sudo udhcpc -i "$wwan0"
fi
}
function TestIP {
#test
sync
sleep 3
echo "Ping a Network for Testing Connectivity"
ping -c 5 1.1.1.1
if [ $? -eq 0 ]; then
cecho "blue" "ping 1.1.1.1 successed"
else
cecho "red" "ping 1.1.1.1 failed"
fi
ping -c 5 tw.yahoo.com
if [ $? -eq 0 ]; then
cecho "blue" "ping tw.yahoo.com successed"
exit 0
else
cecho "red" "ping tw.yahoo.com failed"
exit 1
fi
}
#--Help---------------------------------------------------------------------------------
Devinterface=
Open_Qxdm_RecLog=0
TEST=0
COUNTER=0
MBIM=1 #default
QMI=0
function usageExit() {
cat >&2 <<EOF
telit.sh - Quick link to Internet for test
telit.sh [options]
options:
-h, --help Show this menu
-p, --path device_path Specify the port for AT command, such as: /dev/ttyUSB*
-t, --test counter Test the speed performance
-q, --qmi QMI mode
-m, --mbim MBIM mode (default)
EOF
exit 0
}
function checkArgExit() {
if [[ $# -lt 2 ]]; then
echo "Missing argument for option $1" >&2
usageExit
exit 1
fi
}
# Parse arguments
if [ $# -lt 1 ]; then
cat >&2 <<EOF
Enter paramaters, such as:
sudo ./telit.sh -m -p /dev/ttyUSB0 for MV31,
sudo ./telit.sh -q -p /dev/ttyUSB2 for FN990,
The default mode is MBIM, please use paramater -q or -m to switch QMI/MBIM mode
EOF
exit 0
else
while [ -n "$1" ]; do
case "$1" in
-h | --help)
usageExit
;;
-q | --qmi)
QMI=1
MBIM=0
shift 1
;;
-m | --mbim)
QMI=0
shift 1
;;
-p | --path)
checkArgExit $@
Devinterface=$2
shift 2
;;
-t | --test)
checkArgExit $@
COUNTER=$2
TEST=1
shift 2
;;
-v | --version)
echo version="1.2"
exit
;;
*)
echo "Unknown option $1" >&2
echo >&2
usageExit
;;
esac
done
fi
if [ "$TEST" -eq 1 ]; then
ii=0
log=speedtest_log.txt
if [ ! -f "./speedtest-cli" ]; then
wget -O speedtest-cli https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py
chmod +x speedtest-cli
fi
ret=$(whereis netperf | cut -f 2 -d " ")
if [ "$ret" == "netperf:" ]; then
sudo apt install netperf
fi
while [ $ii -lt $COUNTER ]; do
TIMESTAMP=$(date +%Y-%m-%d_%H:%M:%S)
ping -c 5 1.1.1.1
echo -e "Timestamp: $TIMESTAMP, OK\n" >>$log
if [ $? -eq 0 ]; then
cecho "blue" "ping 1.1.1.1 successed"
./speedtest-cli >/tmp/speedtest_result
cat /tmp/speedtest_result | grep "Download\|Upload\|Packet" >>$log
echo -n -e "\r" >>$log
echo -e "---> netperf -4 -H \"netperf-eu.bufferbloat.net\" -t TCP_MAERTS -l 10 -v 1 -P 1 "
netperf -4 -H "netperf-eu.bufferbloat.net" -t TCP_MAERTS -l 10 -v 1 -P 1
sleep 1
echo -e "\n---> netperf UL test "
echo -e "---> netperf -4 -H \"netperf-eu.bufferbloat.net\" -t TCP_STREAM -l 10 -v 1s -P 1 "
netperf -4 -H "netperf-eu.bufferbloat.net" -t TCP_STREAM -l 10 -v 1 -P 1
sleep 1
sleep 60
else
cecho "red" "ping 1.1.1.1 failed"
echo -e "Timestamp: $TIMESTAMP, Fail\n" >>$log
fi
ii=$((ii + 1))
done
exit 1
fi
dev=$(CheckInterface $Devinterface)
if [ -z $dev ]; then
exit 1
fi
echo $dev
SendCommand $dev "AT+COPS?\r"
if [ "$MBIM" -eq 1 ]; then
cecho "blue" "mbim"
PrepareGetIP "mbim"
PrepareDriver "mbim"
elif [ "$QMI" -eq 1 ]; then
cecho "blue" "qmi"
PrepareGetIP "qmi"
PrepareDriver "qmi"
fi
TestIP
exit
systemctl disable ModemManager.service後，電腦重新開機
或是確認 cdc_mbim.ko 是否有掛載
Linux Driver:
4.9.309 support (keyword: 1e2d and 00b3)
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