# WP7702 FX30 Talon CAN bus IoT **URL:** \ **Category:** FX30\ **Created:** [May 8, 2019, 12:42am UTC](https://forum.sierrawireless.com/t/wp7702-fx30-talon-can-bus-iot/16325 "2019-05-08T00:42:46Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![cporto](https://avatars.discourse-cdn.com/v4/letter/c/c57346/32.png) [@cporto](https://forum.sierrawireless.com/u/cporto)\ **Post date:** [May 8, 2019, 12:42am UTC](https://forum.sierrawireless.com/t/wp7702-fx30-talon-can-bus-iot/16325/1 "2019-05-08T00:42:46Z")
Hello, I have a Talon CAN bus IoT board working on an FX30 3G (WP85xx). Like I showed in the following link: [https://forum.sierrawireless.com/t/talon-can-bus-iot-expansion/14206](https://forum.sierrawireless.com/t/talon-can-bus-iot-expansion/14206) Now I’m trying to migrate the system to an FX30 LTE (WP7702), but I’m having issues bringing the interface up. I compiled the system with the Kernel Modules specified for this chip and I got it loaded, but I cannot find the correct GPIO that brings the board up. > root@swi-mdm9x28-wp:~# lsmod > Tainted: G > mcp251x 9636 0 - Live 0xbf004000 (O) > can\_iot 1072 0 - Live 0xbf000000 (O) > [14.658633] can\_iot\_init: mcp2515 (gpio:79 irq:131). > [14.731595] spi1.0 supply vdd not found, using dummy regulator > [14.731692] spi1.0 supply xceiver not found, using dummy regulator I tried to set the same GPIOs that I have before for the WP85xx (33 and 6), but the system shows me: > root@swi-mdm9x28-wp:~# ip link set can0 type can bitrate 500000 triple-sampling on > Cannot find device “can0” Is there anyone that could help me with that? Thank you very much! ---
**Author:** ![cchenry](https://avatars.discourse-cdn.com/v4/letter/c/a183cd/32.png) [@cchenry](https://forum.sierrawireless.com/u/cchenry)\ **Post date:** [May 8, 2019, 4:13pm UTC](https://forum.sierrawireless.com/t/wp7702-fx30-talon-can-bus-iot/16325/2 "2019-05-08T16:13:36Z")
Hi cporto, Could you please clarify which firmware version you are running? It appears that you’re running a stock version of WP module code, at least the kernel. I recommend using the FX30 R14 source code, otherwise your peripheral won’t function properly. For the GPIO numbering, please take a look at the latest User Guide as there is a GPIO mapping table. If you need further assistance, please let me know. BR, Chris ---
**Author:** ![cporto](https://avatars.discourse-cdn.com/v4/letter/c/c57346/32.png) [@cporto](https://forum.sierrawireless.com/u/cporto)\ **Post date:** [May 10, 2019, 7:41am UTC](https://forum.sierrawireless.com/t/wp7702-fx30-talon-can-bus-iot/16325/3 "2019-05-10T07:41:12Z")
Hi, Just an update. I could figure out the issue doing multiple testings. Here is the script that I have to use with the WP7702 on FX30, I haven’t seen anything like this anywhere before: > #!/bin/sh > > # It seems that taking the IoT card out of reset fails in the core > # mangOH driver - but placing things after user-space has fully started > # and through the SWI gpiolib-sysfs code works - TODO fix and move into > # the core driver so no shell script is needed. > # Thus, we remove the inserted chip driver and bring it back. > > drv=“can\_iot.ko” > drv2=`find /legato/systems/current/modules/ -name "*mcp251x.ko"` > # remove the driver > /mnt/legato/system/bin/kmod unload $drv > /sbin/rmmod mcp251x > > # Take IoT card out of reset > echo 6 \> /sys/class/gpio/export > echo out \> /sys/class/gpio/gpio6/direction > echo 1 \> /sys/class/gpio/gpio6/value > > # Enable level shifter on the CAN IoT card > echo 33 \> /sys/class/gpio/export > echo out \> /sys/class/gpio/gpio33/direction > echo 1 \> /sys/class/gpio/gpio33/value > > # Give a bit of time for the IoT card to come out of reset before loading drivers > sleep 1 > > # Bring driver back & iproute2 add in CAN > /mnt/legato/system/bin/kmod load $drv > /sbin/insmod $drv2 > /sbin/ip link set can0 type can bitrate 500000 triple-sampling on > /sbin/ifconfig can0 up I hope that it will be useful for future people. Thank you!