# Cannot find device Can0 **URL:** \ **Category:** mangOH Green\ **Created:** [March 5, 2021, 4:44pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280 "2021-03-05T16:44:17Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![lucanazzaro](https://avatars.discourse-cdn.com/v4/letter/l/edb3f5/32.png) [@lucanazzaro](https://mangoh.discourse.group/u/lucanazzaro)\ **Post date:** [March 11, 2021, 9:17am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/41 "2021-03-11T09:17:27Z")
ok i downloaded ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/f/fd2500278db3635152f221138b0171df4a4efe71.png) and I started the exe. now what should i do? ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 11, 2021, 9:20am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/42 "2021-03-11T09:20:56Z")
then you have the yocto image as mine ---
**Author:** ![lucanazzaro](https://avatars.discourse-cdn.com/v4/letter/l/edb3f5/32.png) [@lucanazzaro](https://mangoh.discourse.group/u/lucanazzaro)\ **Post date:** [March 11, 2021, 9:23am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/43 "2021-03-11T09:23:19Z")
but the problem is still the same ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/e/e5d8817157340472d059162f4c52d34005edb0e2.png) ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 11, 2021, 9:25am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/44 "2021-03-11T09:25:27Z")
as said before for your case, I have no idea as we have already used the same software. ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 11, 2021, 9:33am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/45 "2021-03-11T09:33:20Z")
![16154552579568451113231618412363](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/4/4f00fac0c0ba9cbe01b9ea4b473daf50cddd5730.jpeg) Sorry, on my mangOH green have I to change any switch? ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 11, 2021, 12:04pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/46 "2021-03-11T12:04:57Z")
another question: I put talon in slot0, but led5 (under it) doesn’t work: ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/4/4e95c8ac6539d4d80592db5677180b79f7fbff5f.png) Could be it a problem? Have I to do something when I insert Talon in mangOH green, or should I simply see the led 5 that turns on? ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 12, 2021, 2:09am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/47 "2021-03-12T02:09:32Z")
only switch 1 on SW401 is ON on my side. ![IMG_20210312_100531](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/6/632b628f459acbf024c25119f16cb5c7288f5d29.jpeg) ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 12, 2021, 2:10am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/48 "2021-03-12T02:10:05Z")
LED5 is OFF on my side. ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 12, 2021, 4:49am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/49 "2021-03-12T04:49:29Z")
Thanks, at least i’m sure that there aren’t hw issues ---
**Author:** ![lucanazzaro](https://avatars.discourse-cdn.com/v4/letter/l/edb3f5/32.png) [@lucanazzaro](https://mangoh.discourse.group/u/lucanazzaro)\ **Post date:** [March 12, 2021, 9:19am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/50 "2021-03-12T09:19:22Z")
I inserted the card that allows me to access the pins to check that the commands written in the script _start\_can.sh_ actually worked. sending the command `./start_can.sh green 1` with the oscilloscope I do not see anything, pin 7 remains at zero volts although in the script there is the command ``` echo 7 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio7/direction echo 1 > /sys/class/gpio/gpio7/value ``` on the 5V and 3.3V pins I detect the voltage ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/c/c47703f3ddb285e61631a2aab3c030b734cb0079.jpeg) ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 12, 2021, 9:25am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/51 "2021-03-12T09:25:57Z")
i checked the schematic of mangoh green board, pin 7 of IOT slot 1 is “not connected”. ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 15, 2021, 11:43am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/52 "2021-03-15T11:43:25Z")
Sorry, why are there two files green.wp76xx? which one should I use? [image] [image] ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 15, 2021, 11:59am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/53 "2021-03-15T11:59:46Z")
This is rar file, you need to download two files to extract!!! ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 15, 2021, 12:23pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/54 "2021-03-15T12:23:56Z")
honestly, I didn’t understand how to do and after two weeks can0 doesn’t work… 😫 😓 😣 😥 ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 15, 2021, 12:26pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/55 "2021-03-15T12:26:55Z")
are you sure that your guide is for wp76xx? in the name of your mangOH file I see the name wp75… is not that you did the tests only on the wp75 module instead of wp76? I really don’t know what to do anymore, I’m desperate ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 15, 2021, 12:46pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/56 "2021-03-15T12:46:14Z")
Honestly, i have no idea as we already used the same software ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 15, 2021, 1:33pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/57 "2021-03-15T13:33:38Z")
I think that the problem stays in yocto image…but you said that you didn’t do anything on yocto, so… ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 15, 2021, 2:21pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/58 "2021-03-15T14:21:17Z")
Have I to merge the two rar files? Believe me, I didn’t understand what do you mean… ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [March 15, 2021, 3:43pm UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/59 "2021-03-15T15:43:48Z")
[https://www.google.com/search?q=extract+part+rar&oq=extract+part+rar&aqs=chrome..69i57.10353j0j4&sourceid=chrome-mobile&ie=UTF-8](https://www.google.com/search?q=extract+part+rar&oq=extract+part+rar&aqs=chrome..69i57.10353j0j4&sourceid=chrome-mobile&ie=UTF-8) ---
**Author:** ![gavinoimparato1](https://avatars.discourse-cdn.com/v4/letter/g/f475e1/32.png) [@gavinoimparato1](https://mangoh.discourse.group/u/gavinoimparato1)\ **Post date:** [March 16, 2021, 8:57am UTC](https://mangoh.discourse.group/t/cannot-find-device-can0/6280/60 "2021-03-16T08:57:42Z")
sorry, have I to swice fw on the board with swice command? [Previous page](https://mangoh.discourse.group/t/cannot-find-device-can0/6280.md?page=2) [Next page](https://mangoh.discourse.group/t/cannot-find-device-can0/6280.md?page=4)