2x mPCIe + 1x M.2 B

The internal interface:

• mPCIe #0: USB 2 Only

• mPCIe #1: USB 2 + PCIe

• M.2 B: USB 3 + USB 2

Hardware reset sequence depends on the specific module.

Jetpack5.x Reset

sudo -s 
# sudo cat /sys/kernel/debug/gpio


# mPCIe #0 (USB 2 Only) # Only from ES2
# PR.01 _ gpio-457
echo 457 > /sys/class/gpio/export
echo out > /sys/class/gpio/PR.01/direction
echo 0 > /sys/class/gpio/PR.01/value
sleep 1
echo 1 > /sys/class/gpio/PR.01/value

#module:Telit HE-910-D
# mPCIe #1 (USB 2 + PCIe) Reset Only for pure USB devices
# PK.03 _ gpio-415
echo 415 > /sys/class/gpio/export
echo out > /sys/class/gpio/PK.03/direction
echo 0 > /sys/class/gpio/PK.03/value
sleep 3
echo 1 > /sys/class/gpio/PK.03/value
sleep 15

# M.2 B Key (USB 3 + USB 2) Reset
# PA.00 _ gpio-348
echo 348 > /sys/class/gpio/export
echo out > /sys/class/gpio/PA.00/direction
echo 0 > /sys/class/gpio/PA.00/value
sleep 1
echo 1 > /sys/class/gpio/PA.00/value

Jetpack6.x Reset

sudo -s

function setGPO_JP6(){ 
# $1=gpo_id $2=gpo_value
    PIN=$1
    sudo pkill -f -- "$(sudo gpiofind $PIN)"
    sudo gpioset -m signal $(sudo gpiofind $PIN)=$2 &
}

# mPCIe #0 (USB 2 Only) # Only from ES2
U2_RESET=PR.01
setGPO_JP6 $U2_RESET 0

# mPCIe #1 (USB 2 + PCIe) Reset Only for pure USB devices
U2_PCIe_RESET=PK.03
setGPO_JP6 $U2_PCIe_RESET 1

# M.2 B Key (USB 3 + USB 2) Reset
U2_U3_RESET=PA.00
setGPO_JP6 $U2_U3_RESET 0
sleep 1
setGPO_JP6 $U2_U3_RESET 1

mPCIe #1 with EM7455

If the USB signal is unstable and keeps connecting and disconnecting, you can try the following steps:

sudo -s

function setGPO_JP6(){ 
# $1=gpo_id $2=gpo_value
    PIN=$1
    sudo pkill -f -- "$(sudo gpiofind $PIN)"
    sudo gpioset -m signal $(sudo gpiofind $PIN)=$2 &
}

# mPCIe #1 (USB 2 + PCIe) Reset Only for pure USB devices
U2_PCIe_RESET=PK.03
setGPO_JP6 $U2_PCIe_RESET 1

exit

watch -n 1 lsusb # Check the USB device remains stable.